{"id":47499,"date":"2025-12-25T08:20:18","date_gmt":"2025-12-25T08:20:18","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=47499"},"modified":"2025-12-25T08:20:18","modified_gmt":"2025-12-25T08:20:18","slug":"junction-box-nec-code-standards","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/","title":{"rendered":"Caixa de Jun\u00e7\u00e3o - Normas do C\u00f3digo El\u00e9trico Nacional (NEC)"},"content":{"rendered":"<p>O NEC (C\u00f3digo El\u00e9trico Nacional), como requisito m\u00ednimo de seguran\u00e7a para instala\u00e7\u00f5es el\u00e9tricas nos Estados Unidos, fornece diretrizes abrangentes para todos os setores. Quais s\u00e3o as normas el\u00e9tricas espec\u00edficas especificadas pelo NEC? Se voc\u00ea precisa instalar sistemas de fia\u00e7\u00e3o el\u00e9trica em edif\u00edcios usando caixas de jun\u00e7\u00e3o, este artigo abordar\u00e1 os requisitos do NEC que voc\u00ea precisa seguir.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u00cdndice<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Alternar \u00edndice\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Alternar<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#What_is_the_NEC_Code\" >O que \u00e9 o C\u00f3digo NEC?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#How_NEC_is_Updated_and_Maintained\" >Como o NEC \u00e9 atualizado e mantido<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_Requirements_for_Junction_Boxes_and_Enclosures\" >Requisitos da NEC para caixas de jun\u00e7\u00e3o e inv\u00f3lucros<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_31428%E2%80%94Junction_Box_Material\" >NEC 314.28 \u2014 Material da caixa de jun\u00e7\u00e3o<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Material_Requirements\" >Requisitos de materiais<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#IP_Rating_Requirements\" >Requisitos de classifica\u00e7\u00e3o IP<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_31416%E2%80%94Volume_Size_of_the_Junction_Box\" >NEC 314.16 \u2014 Dimens\u00f5es da caixa de jun\u00e7\u00e3o<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Method_of_Determining_the_Correct_Volume\" >M\u00e9todo para determinar o volume correto<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Box_Fill_Requirements\" >Requisitos de preenchimento da caixa<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_370-29%E2%80%94Junction_Boxes_in_Hazardous_Locations\" >NEC 370-29 \u2014 Caixas de Jun\u00e7\u00e3o em Locais Perigosos<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Special_Requirements_for_Hazardous_Areas\" >Requisitos especiais para \u00e1reas classificadas como perigosas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Installation_Restrictions\" >Restri\u00e7\u00f5es de Instala\u00e7\u00e3o<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_31429%E2%80%94Junction_Box_in_Non-Hazardous_Locations\" >NEC 314.29 \u2014 Caixa de Jun\u00e7\u00e3o em Locais N\u00e3o Perigosos<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_Requirements\" >Requisitos da NEC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Cover_Requirements\" >Requisitos de cobertura<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_250110%E2%80%94Grounding_Requirements\" >NEC 250.110 \u2014 Requisitos de aterramento<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Grounding_for_Metal_Junction_Boxes\" >Aterramento para caixas de jun\u00e7\u00e3o met\u00e1licas<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Grounding_for_Non-Metallic_Junction_Boxes\" >Aterramento para caixas de jun\u00e7\u00e3o n\u00e3o met\u00e1licas<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#NEC_11026-Clearance_Requirements\" >Requisitos de folga NEC 110.26<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Clearance_Operation_Requirements\" >Requisitos de Opera\u00e7\u00e3o de Desminagem<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Accessibility_Rules\" >Regras de Acessibilidade<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#How_to_Avoid_Common_NEC_Violations\" >Como evitar viola\u00e7\u00f5es comuns do NEC<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Junction_Box_Overload\" >Sobrecarga da caixa de jun\u00e7\u00e3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Improper_Equipment_Wiring\" >Fia\u00e7\u00e3o inadequada do equipamento<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Using_the_Incorrect_Type_of_Junction_Box\" >Utilizando o tipo incorreto de caixa de jun\u00e7\u00e3o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Excessive_Filling_of_Conduit_or_Cable_Trays\" >Enchimento excessivo de eletrodutos ou bandejas de cabos<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#FAQ\" >Perguntas frequentes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#What_Are_the_Differences_for_Enclosures_Between_NEMA_and_NEC\" >Quais s\u00e3o as diferen\u00e7as entre os inv\u00f3lucros NEMA e NEC?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#How_to_Choose_a_Junction_Box_of_the_Appropriate_Volume\" >Como escolher uma caixa de jun\u00e7\u00e3o com o volume adequado?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Is_the_Covering_Junction_Box_Safe_and_Complies_with_NEC_Regulations\" >A caixa de jun\u00e7\u00e3o com cobertura \u00e9 segura e est\u00e1 em conformidade com as normas NEC?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#What_Consequences_can_be_Caused_by_Incorrect_Grounding_of_the_Junction_Box\" >Quais as consequ\u00eancias que podem ser causadas por um aterramento incorreto da caixa de jun\u00e7\u00e3o?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/#Final_Thought\" >Considera\u00e7\u00f5es finais<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_NEC_Code\"><\/span>O que \u00e9 o C\u00f3digo NEC?<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47504\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/NEC-Code.jpg\" alt=\"C\u00f3digo NEC\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/NEC-Code.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/NEC-Code-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/NEC-Code-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/NEC-Code-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>O C\u00f3digo El\u00e9trico Nacional (NEC, na sigla em ingl\u00eas) \u00e9 um texto normativo modelo formulado por uma organiza\u00e7\u00e3o n\u00e3o governamental, que estabelece os requisitos m\u00ednimos de seguran\u00e7a para garantir a prote\u00e7\u00e3o de pessoas e propriedades. O NEC visa promover a fia\u00e7\u00e3o el\u00e9trica correta e fornece um guia completo para instala\u00e7\u00f5es e equipamentos el\u00e9tricos. O NEC detalha os m\u00e9todos de seguran\u00e7a para a instala\u00e7\u00e3o de sistemas el\u00e9tricos. Al\u00e9m disso, o NEC tamb\u00e9m oferece orienta\u00e7\u00f5es abrangentes sobre precau\u00e7\u00f5es de seguran\u00e7a. A instala\u00e7\u00e3o correta, seguindo as diretrizes do c\u00f3digo, pode ajudar a prevenir inc\u00eandios, curtos-circuitos e mau funcionamento.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_NEC_is_Updated_and_Maintained\"><\/span>Como o NEC \u00e9 atualizado e mantido<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>O c\u00f3digo NEC para<a href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao\/\">caixa de jun\u00e7\u00e3o<\/a>\u00a0Em si, o NEC n\u00e3o tem efeito legal, mas a maioria dos estados dos Estados Unidos adotou o c\u00f3digo el\u00e9trico nacional (NEC) em sua forma legal como regulamenta\u00e7\u00e3o el\u00e9trica dentro de suas jurisdi\u00e7\u00f5es. O rigor da reda\u00e7\u00e3o do NEC e sua ampla aplica\u00e7\u00e3o o tornaram a especifica\u00e7\u00e3o el\u00e9trica de maior influ\u00eancia internacional. Ele j\u00e1 se tornou a base para seguros e justi\u00e7a.<\/p>\n<p>Um dos principais aspectos da autoridade do NEC (C\u00f3digo El\u00e9trico Nacional) decorre de sua tecnologia avan\u00e7ada e seguran\u00e7a. Ele \u00e9 atualizado e revisado a cada tr\u00eas anos e analisado por um painel de especialistas para tornar as instala\u00e7\u00f5es el\u00e9tricas mais seguras e eficientes.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NEC_Requirements_for_Junction_Boxes_and_Enclosures\"><\/span>Requisitos da NEC para caixas de jun\u00e7\u00e3o e inv\u00f3lucros<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>O NEC (C\u00f3digo El\u00e9trico Nacional) possui requisitos espec\u00edficos para todos os aspectos das caixas de jun\u00e7\u00e3o, a fim de garantir a fia\u00e7\u00e3o el\u00e9trica correta e sua seguran\u00e7a. A seguir, alguns requisitos espec\u00edficos do NEC para caixas de jun\u00e7\u00e3o.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_31428%E2%80%94Junction_Box_Material\"><\/span>NEC 314.28 \u2014 Material da caixa de jun\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A se\u00e7\u00e3o 314.28 estipula a sele\u00e7\u00e3o do material das caixas de jun\u00e7\u00e3o, que geralmente s\u00e3o feitas de metal ou pl\u00e1stico. Voc\u00ea pode avaliar, com base no ambiente de instala\u00e7\u00e3o, a escolha da caixa de jun\u00e7\u00e3o espec\u00edfica mais adequada.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Material_Requirements\"><\/span>Requisitos de materiais<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>A produ\u00e7\u00e3o de caixas de jun\u00e7\u00e3o geralmente emprega materiais n\u00e3o combust\u00edveis, como a\u00e7o inoxid\u00e1vel e PVC. Naturalmente, ao escolher o material para a caixa de jun\u00e7\u00e3o, tamb\u00e9m \u00e9 preciso levar em considera\u00e7\u00e3o os diferentes ambientes de uso.<\/p>\n<p>Por exemplo, se o ambiente de instala\u00e7\u00e3o for \u00famido, a umidade pode infiltrar-se facilmente na caixa de jun\u00e7\u00e3o, representando um risco \u00e0 seguran\u00e7a el\u00e9trica. Portanto, \u00e9 necess\u00e1rio utilizar uma caixa de jun\u00e7\u00e3o com classifica\u00e7\u00e3o de resist\u00eancia \u00e0 umidade adequada.<\/p>\n<p>Se a instala\u00e7\u00e3o for em ambientes corrosivos, voc\u00ea pode optar por caixas de jun\u00e7\u00e3o met\u00e1licas, como as feitas de... <a href=\"https:\/\/www.kdmsteel.com\/pt\/gabinete-eletrico\/gabinete-eletrico-de-aco-inoxidavel\/\">a\u00e7o inoxid\u00e1vel<\/a>\u00a0e <a href=\"https:\/\/www.kdmsteel.com\/pt\/gabinete-de-aluminio\/\">alum\u00ednio<\/a>. Este material possui baixa taxa de corros\u00e3o, previne ferrugem e degrada\u00e7\u00e3o, garantindo uma vida \u00fatil mais longa.<\/p>\n<p>Se voc\u00ea usar uma caixa el\u00e9trica de pl\u00e1stico, ela deve ser capaz de suportar condi\u00e7\u00f5es ambientais adversas, como raios UV e umidade, e ser constru\u00edda estritamente de acordo com as normas para instala\u00e7\u00f5es el\u00e9tricas.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47380\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/2_3_4-Gang-Junction-Box.jpg\" alt=\"Caixa de jun\u00e7\u00e3o de 2, 3 e 4 vias\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/2_3_4-Gang-Junction-Box.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/2_3_4-Gang-Junction-Box-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/2_3_4-Gang-Junction-Box-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/2_3_4-Gang-Junction-Box-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"IP_Rating_Requirements\"><\/span>Requisitos de classifica\u00e7\u00e3o IP<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Independentemente do material da caixa de jun\u00e7\u00e3o, o NEC especifica que ela deve ter um certo grau de... <a href=\"https:\/\/www.kdmsteel.com\/pt\/gabinete-ip\/\">prote\u00e7\u00e3o contra entrada (IP)<\/a>. A classifica\u00e7\u00e3o IP determina a capacidade de resistir \u00e0 umidade e \u00e0 poeira. Isso \u00e9 crucial para a seguran\u00e7a el\u00e9trica em ambientes externos, f\u00e1bricas e locais de produ\u00e7\u00e3o \u00famidos.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_31416%E2%80%94Volume_Size_of_the_Junction_Box\"><\/span>NEC 314.16 \u2014 Dimens\u00f5es da caixa de jun\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A norma NEC 314.16 detalha as regras sobre o volume m\u00ednimo exigido para caixas de jun\u00e7\u00e3o de diferentes tipos de fios. O objetivo principal \u00e9 garantir que haja espa\u00e7o suficiente na caixa para fios, conectores e equipamentos, evitando superaquecimento, danos ao isolamento ou falhas de conex\u00e3o causadas por sobrecarga.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Method_of_Determining_the_Correct_Volume\"><\/span>M\u00e9todo para determinar o volume correto<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>O NEC especifica que o volume deve ser medido em polegadas c\u00fabicas. Normalmente, o volume necess\u00e1rio \u00e9 determinado com base na quantidade e na bitola dos fios que precisam ser acomodados dentro da caixa de jun\u00e7\u00e3o, bem como em quaisquer dispositivos instalados em seu interior, como lumin\u00e1rias, interruptores e tomadas.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Box_Fill_Requirements\"><\/span>Requisitos de preenchimento da caixa<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Para garantir uma instala\u00e7\u00e3o el\u00e9trica adequada e a seguran\u00e7a el\u00e9trica, o c\u00f3digo NEC especifica claramente o tamanho e o volume m\u00ednimos das caixas de jun\u00e7\u00e3o necess\u00e1rias para diferentes bitolas e quantidades de fios. Por exemplo, uma caixa de jun\u00e7\u00e3o de 18 polegadas c\u00fabicas pode acomodar, no m\u00e1ximo, de tr\u00eas a seis fios, enquanto uma de 20 polegadas c\u00fabicas pode acomodar, no m\u00e1ximo, de sete a oito fios.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_370-29%E2%80%94Junction_Boxes_in_Hazardous_Locations\"><\/span>NEC 370-29 \u2014 Caixas de Jun\u00e7\u00e3o em Locais Perigosos<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47373\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Plastic-Junction-Box-2.jpg\" alt=\"Caixa de jun\u00e7\u00e3o de pl\u00e1stico (2)\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Plastic-Junction-Box-2.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Plastic-Junction-Box-2-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Plastic-Junction-Box-2-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Plastic-Junction-Box-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Para a produ\u00e7\u00e3o de caixas de jun\u00e7\u00e3o em \u00e1reas classificadas como perigosas, \u00e9 necess\u00e1rio selecionar materiais espec\u00edficos. Esse tipo de caixa de jun\u00e7\u00e3o \u00e9 geralmente utilizado em ambientes com gases e poeira inflam\u00e1veis. Portanto, sua produ\u00e7\u00e3o deve atender a normas de seguran\u00e7a espec\u00edficas para evitar explos\u00f5es de grande escala.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Special_Requirements_for_Hazardous_Areas\"><\/span>Requisitos especiais para \u00e1reas classificadas como perigosas<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Em \u00e1reas classificadas como perigosas, as caixas de jun\u00e7\u00e3o devem ser rigorosamente seladas para impedir a fuga de gases inflam\u00e1veis. Devem tamb\u00e9m ser \u00e0 prova de explos\u00e3o. Mesmo que ocorra uma explos\u00e3o interna, a caixa de jun\u00e7\u00e3o n\u00e3o deve ser danificada para evitar explos\u00f5es ou inc\u00eandios de grandes propor\u00e7\u00f5es.<\/p>\n<p>Al\u00e9m disso, tamb\u00e9m precisa impedir que a eletricidade est\u00e1tica cause igni\u00e7\u00e3o. A elimina\u00e7\u00e3o da eletricidade est\u00e1tica \u00e9 uma fun\u00e7\u00e3o essencial. Diferentes caixas de jun\u00e7\u00e3o requerem etiquetas claras, como marca\u00e7\u00f5es de perigo e faixas de temperatura m\u00e1xima.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Installation_Restrictions\"><\/span>Restri\u00e7\u00f5es de Instala\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>As caixas de jun\u00e7\u00e3o n\u00e3o devem ser escondidas em tetos, paredes ou espa\u00e7os inacess\u00edveis, como s\u00f3t\u00e3os e \u00e1reas sob o piso.<\/p>\n<p>N\u00e3o deve ser colocado em \u00e1reas onde gases ou poeira inflam\u00e1veis possam causar inc\u00eandios ou explos\u00f5es.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_31429%E2%80%94Junction_Box_in_Non-Hazardous_Locations\"><\/span>NEC 314.29 \u2014 Caixa de Jun\u00e7\u00e3o em Locais N\u00e3o Perigosos<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"NEC_Requirements\"><\/span>Requisitos da NEC<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Para caixas de jun\u00e7\u00e3o em \u00e1reas n\u00e3o classificadas como perigosas, o NEC (C\u00f3digo El\u00e9trico Nacional) estipula claramente que elas devem ser instaladas em locais de f\u00e1cil acesso para facilitar a manuten\u00e7\u00e3o e a inspe\u00e7\u00e3o. N\u00e3o deve haver obst\u00e1culos ao redor do local de instala\u00e7\u00e3o, permitindo opera\u00e7\u00e3o e manuten\u00e7\u00e3o seguras. Al\u00e9m disso, a caixa de jun\u00e7\u00e3o precisa ser firmemente apoiada para evitar deslocamento e afrouxamento causados pelo uso prolongado.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Cover_Requirements\"><\/span>Requisitos de cobertura<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>A tampa precisa ser fixada firmemente, geralmente apertada com parafusos. Ela n\u00e3o deve ultrapassar a borda em mais de 3 mm (1\/8 de polegada), o que pode prevenir eficazmente choques el\u00e9tricos acidentais.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_250110%E2%80%94Grounding_Requirements\"><\/span>NEC 250.110 \u2014 Requisitos de aterramento<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47502\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-Grounding-Requirements.jpg\" alt=\"Requisitos de aterramento da caixa de jun\u00e7\u00e3o\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-Grounding-Requirements.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-Grounding-Requirements-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-Grounding-Requirements-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-Grounding-Requirements-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A Se\u00e7\u00e3o 250.110 estipula os padr\u00f5es de aterramento para equipamentos el\u00e9tricos. Esta \u00e9 uma medida eficaz para prevenir choques el\u00e9tricos e inc\u00eandios, aterrando a caixa de jun\u00e7\u00e3o e proporcionando um caminho seguro para o retorno da corrente de falha. Esta medida consiste principalmente em conectar o condutor de aterramento \u00e0 caixa de jun\u00e7\u00e3o.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Grounding_for_Metal_Junction_Boxes\"><\/span>Aterramento para caixas de jun\u00e7\u00e3o met\u00e1licas<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Os componentes met\u00e1licos dentro da caixa de jun\u00e7\u00e3o devem ser conectados ao sistema de aterramento. \u00c9 importante observar que o fio de aterramento precisa ter a mesma bitola da caixa de jun\u00e7\u00e3o. As caixas de jun\u00e7\u00e3o met\u00e1licas devem ser aterradas instalando parafusos de aterramento nos orif\u00edcios roscados.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Grounding_for_Non-Metallic_Junction_Boxes\"><\/span>Aterramento para caixas de jun\u00e7\u00e3o n\u00e3o met\u00e1licas<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>Para caixas de jun\u00e7\u00e3o n\u00e3o met\u00e1licas, como as de pl\u00e1stico, ainda \u00e9 necess\u00e1rio instal\u00e1-las nas posi\u00e7\u00f5es adequadas usando clipes de aterramento ou condutores de aterramento compat\u00edveis. Em seguida, voc\u00ea deve aterr\u00e1-las de acordo com os m\u00e9todos de aterramento compat\u00edveis com o NEC (C\u00f3digo El\u00e9trico Nacional).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_11026-Clearance_Requirements\"><\/span>Requisitos de folga NEC 110.26<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A Se\u00e7\u00e3o 110.26 estipula principalmente a dist\u00e2ncia de seguran\u00e7a entre caixas de jun\u00e7\u00e3o e outros equipamentos el\u00e9tricos, deixando um espa\u00e7o razo\u00e1vel e seguro para as opera\u00e7\u00f5es dos eletricistas.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Clearance_Operation_Requirements\"><\/span>Requisitos de Opera\u00e7\u00e3o de Desminagem<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>O espa\u00e7o m\u00ednimo de trabalho em frente \u00e0 caixa el\u00e9trica \u00e9 de 91 cm (36 polegadas) de profundidade. O espa\u00e7o em profundidade para realizar inspe\u00e7\u00f5es e usar ferramentas de opera\u00e7\u00e3o \u00e9 de 76 cm (30 polegadas). Para fins de seguran\u00e7a e manuten\u00e7\u00e3o, o NEC (C\u00f3digo El\u00e9trico Nacional) estipula que uma altura livre m\u00ednima de pelo menos 1,8 m (6 p\u00e9s) deve ser mantida, a qual \u00e9 determinada com base na tens\u00e3o do equipamento instalado.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Accessibility_Rules\"><\/span>Regras de Acessibilidade<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>A porta do seu dispositivo deve poder abrir em pelo menos 90 graus para facilitar o acesso aos componentes e circuitos. A \u00e1rea de trabalho deve ser mantida limpa, sem obst\u00e1culos bloqueando as passagens.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Avoid_Common_NEC_Violations\"><\/span>Como evitar viola\u00e7\u00f5es comuns do NEC<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47503\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box.jpg\" alt=\"Caixa de jun\u00e7\u00e3o\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Junction_Box_Overload\"><\/span>Sobrecarga da caixa de jun\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u00e1 muitos fios, conectores e dispositivos dentro da caixa de jun\u00e7\u00e3o, excedendo o volume indicado. Isso pode causar ac\u00famulo de calor nos equipamentos, levando ao envelhecimento e derretimento do isolamento, podendo at\u00e9 mesmo provocar curtos-circuitos ou inc\u00eandios. Portanto, \u00e9 necess\u00e1rio calcular o volume da caixa de jun\u00e7\u00e3o com base na quantidade de fios. Se n\u00e3o tiver certeza, opte por uma caixa de jun\u00e7\u00e3o com capacidade maior.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Improper_Equipment_Wiring\"><\/span>Fia\u00e7\u00e3o inadequada do equipamento<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>O fio de aterramento do equipamento na caixa met\u00e1lica ou no canaleta do tubo n\u00e3o est\u00e1 conectado, ou est\u00e1 apenas enrolado no parafuso de aterramento sem o uso do terminal correto. Uma caixa met\u00e1lica que conduziu corrente por um longo per\u00edodo pode causar s\u00e9rios riscos de choque el\u00e9trico em caso de falha de aterramento. Utilize os blocos de terminais, clipes ou parafusos corretos para garantir um contato met\u00e1lico firme.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Using_the_Incorrect_Type_of_Junction_Box\"><\/span>Utilizando o tipo incorreto de caixa de jun\u00e7\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Por exemplo, em um ambiente \u00famido, utilize a caixa de jun\u00e7\u00e3o normalmente usada em locais secos. Uma caixa de jun\u00e7\u00e3o inadequada permite a entrada de poeira e umidade. A umidade pode causar corros\u00e3o, curto-circuito e risco de choque el\u00e9trico. Voc\u00ea deve sempre utilizar caixas de jun\u00e7\u00e3o espec\u00edficas que estejam em conformidade com as normas NEC para conectar acess\u00f3rios.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Excessive_Filling_of_Conduit_or_Cable_Trays\"><\/span>Enchimento excessivo de eletrodutos ou bandejas de cabos<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Se a \u00e1rea da se\u00e7\u00e3o transversal do fio inserido no eletroduto exceder a taxa de preenchimento m\u00e1xima permitida, isso levar\u00e1 a uma dissipa\u00e7\u00e3o de calor deficiente, superaquecimento do fio e poder\u00e1 danificar o isolamento. Portanto, calcular a taxa de preenchimento adequada do eletroduto ou escolher um eletroduto de maior di\u00e2metro pode melhorar a dissipa\u00e7\u00e3o de calor e deixar espa\u00e7o suficiente para futuras expans\u00f5es da linha.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47501\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg\" alt=\"Caixa de Jun\u00e7\u00e3o (2)\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQ\"><\/span>Perguntas frequentes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"What_Are_the_Differences_for_Enclosures_Between_NEMA_and_NEC\"><\/span>Quais s\u00e3o as diferen\u00e7as entre os inv\u00f3lucros NEMA e NEC?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/www.kdmsteel.com\/pt\/involucro-nema\/\">NEMA<\/a>\u00a0A NEC (National Electrical Code) \u00e9 uma organiza\u00e7\u00e3o de padr\u00f5es industriais. Ela define principalmente os padr\u00f5es de desempenho de produtos para inv\u00f3lucros, que s\u00e3o usados para classificar as propriedades f\u00edsicas de inv\u00f3lucros el\u00e9tricos, como resist\u00eancia \u00e0 poeira, \u00e0 \u00e1gua e \u00e0 corros\u00e3o, etc. A NEC \u00e9 uma especifica\u00e7\u00e3o regulamentar de seguran\u00e7a para instala\u00e7\u00f5es el\u00e9tricas que exige o uso de inv\u00f3lucros que atendam \u00e0 classifica\u00e7\u00e3o NEMA correspondente em instala\u00e7\u00f5es espec\u00edficas.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Choose_a_Junction_Box_of_the_Appropriate_Volume\"><\/span>Como escolher uma caixa de jun\u00e7\u00e3o com o volume adequado?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>De acordo com a norma NEC 314.16, \u00e9 necess\u00e1rio contar todos os componentes dentro da caixa e calcular o n\u00famero de fios que eles ocupam, conforme o c\u00f3digo NEC. Em seguida, com base na especifica\u00e7\u00e3o m\u00e1xima de fios, determine o volume por unidade de quantidade de fios. O volume da caixa de jun\u00e7\u00e3o deve ser preferencialmente maior que o volume necess\u00e1rio.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_the_Covering_Junction_Box_Safe_and_Complies_with_NEC_Regulations\"><\/span>A caixa de jun\u00e7\u00e3o com cobertura \u00e9 segura e est\u00e1 em conformidade com as normas NEC?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sim, a caixa de jun\u00e7\u00e3o com tampa n\u00e3o s\u00f3 \u00e9 segura, como tamb\u00e9m \u00e9 um requisito obrigat\u00f3rio das normas NEC. Todas as caixas de jun\u00e7\u00e3o devem ser equipadas com tampas completas, que previnem choques el\u00e9tricos, impedem a entrada de poeira e umidade e garantem a integridade do sistema el\u00e9trico.<\/p>\n<p>\u00c9 importante observar que a placa de cobertura escolhida deve ser compat\u00edvel com o tipo de caixa de jun\u00e7\u00e3o e adequada ao ambiente de instala\u00e7\u00e3o. A tampa precisa ser instalada firmemente para cobrir com seguran\u00e7a a abertura da caixa.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Consequences_can_be_Caused_by_Incorrect_Grounding_of_the_Junction_Box\"><\/span>Quais as consequ\u00eancias que podem ser causadas por um aterramento incorreto da caixa de jun\u00e7\u00e3o?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Isso pode causar choques el\u00e9tricos fatais ou inc\u00eandios devido ao superaquecimento dos fios. A falha no retorno da tens\u00e3o de falta \u00e0 sua fonte pode levar a danos nos equipamentos. Mais importante ainda, instala\u00e7\u00f5es n\u00e3o homologadas n\u00e3o podem passar por inspe\u00e7\u00f5es el\u00e9tricas e podem resultar em multas ou mesmo responsabilidade legal.<img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-47379\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Weatherproof-Junction-Box.jpg\" alt=\"Caixa de jun\u00e7\u00e3o \u00e0 prova de intemp\u00e9ries\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Weatherproof-Junction-Box.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Weatherproof-Junction-Box-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Weatherproof-Junction-Box-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Weatherproof-Junction-Box-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_Thought\"><\/span>Considera\u00e7\u00f5es finais<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Uma instala\u00e7\u00e3o el\u00e9trica segura exige n\u00e3o apenas o cumprimento das normas NEC, mas tamb\u00e9m a utiliza\u00e7\u00e3o de caixas de jun\u00e7\u00e3o que atendam \u00e0s especifica\u00e7\u00f5es para diversos cen\u00e1rios. <a href=\"https:\/\/www.kdmsteel.com\/pt\/\">KDM<\/a>\u00a0Somos fabricantes profissionais de caixas el\u00e9tricas personalizadas. Produzimos caixas el\u00e9tricas sob medida, de NEMA 1 a NEMA 13, atendendo plenamente a todas as suas necessidades de personaliza\u00e7\u00e3o. Resposta r\u00e1pida e servi\u00e7os completos de personaliza\u00e7\u00e3o s\u00e3o nossos diferenciais na fabrica\u00e7\u00e3o sob medida. Entre em contato conosco para obter uma solu\u00e7\u00e3o personalizada.<\/p>","protected":false},"excerpt":{"rendered":"<p>The NEC, as the minimum safety requirement for electrical installations in the United States, provides comprehensive guidance for all industries. What specific electrical standards does the NEC specify? If you need to install electrical wiring systems in buildings using junction boxes, this article will discuss the NEC requirements you need to follow. What is the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":47501,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1],"tags":[],"class_list":["post-47499","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Junction Box NEC Code Standards - KDM Steel<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/\" \/>\n<meta property=\"og:locale\" content=\"pt_PT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Junction Box NEC Code Standards - KDM Steel\" \/>\n<meta property=\"og:description\" content=\"The NEC, as the minimum safety requirement for electrical installations in the United States, provides comprehensive guidance for all industries. What specific electrical standards does the NEC specify? If you need to install electrical wiring systems in buildings using junction boxes, this article will discuss the NEC requirements you need to follow. What is the [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/\" \/>\n<meta property=\"og:site_name\" content=\"KDM Steel\" \/>\n<meta property=\"article:published_time\" content=\"2025-12-25T08:20:18+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"720\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"KDM Steel\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Escrito por\" \/>\n\t<meta name=\"twitter:data1\" content=\"KDM Steel\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo estimado de leitura\" \/>\n\t<meta name=\"twitter:data2\" content=\"10 minutos\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/\"},\"author\":{\"name\":\"KDM Steel\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#\\\/schema\\\/person\\\/20f9dd106f5824b75813f83f5a192a5f\"},\"headline\":\"Junction Box NEC Code Standards\",\"datePublished\":\"2025-12-25T08:20:18+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/\"},\"wordCount\":1827,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.kdmsteel.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Junction-Box-2.jpg\",\"articleSection\":[\"Blog\"],\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/\",\"url\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/\",\"name\":\"Junction Box NEC Code Standards - KDM Steel\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.kdmsteel.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Junction-Box-2.jpg\",\"datePublished\":\"2025-12-25T08:20:18+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#breadcrumb\"},\"inLanguage\":\"pt-PT\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.kdmsteel.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Junction-Box-2.jpg\",\"contentUrl\":\"https:\\\/\\\/www.kdmsteel.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/Junction-Box-2.jpg\",\"width\":1280,\"height\":720,\"caption\":\"Junction Box (2)\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/junction-box-nec-code-standards\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.kdmsteel.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Junction Box NEC Code Standards\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#website\",\"url\":\"https:\\\/\\\/www.kdmsteel.com\\\/\",\"name\":\"KDM Steel\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.kdmsteel.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"pt-PT\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#organization\",\"name\":\"KDM Steel\",\"url\":\"https:\\\/\\\/www.kdmsteel.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.kdmsteel.com\\\/wp-content\\\/uploads\\\/2024\\\/05\\\/cropped-kdmsteel-logo.png\",\"contentUrl\":\"https:\\\/\\\/www.kdmsteel.com\\\/wp-content\\\/uploads\\\/2024\\\/05\\\/cropped-kdmsteel-logo.png\",\"width\":998,\"height\":535,\"caption\":\"KDM Steel\"},\"image\":{\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.kdmsteel.com\\\/#\\\/schema\\\/person\\\/20f9dd106f5824b75813f83f5a192a5f\",\"name\":\"KDM Steel\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"pt-PT\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/64b16d13078b1bec337dbb31f593dfd16bc530c88ca9fe9b1c9d2a002408080e?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/64b16d13078b1bec337dbb31f593dfd16bc530c88ca9fe9b1c9d2a002408080e?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/64b16d13078b1bec337dbb31f593dfd16bc530c88ca9fe9b1c9d2a002408080e?s=96&d=mm&r=g\",\"caption\":\"KDM Steel\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Caixa de Jun\u00e7\u00e3o de acordo com as Normas do C\u00f3digo El\u00e9trico Nacional (NEC) - A\u00e7o KDM","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/","og_locale":"pt_PT","og_type":"article","og_title":"Junction Box NEC Code Standards - KDM Steel","og_description":"The NEC, as the minimum safety requirement for electrical installations in the United States, provides comprehensive guidance for all industries. What specific electrical standards does the NEC specify? If you need to install electrical wiring systems in buildings using junction boxes, this article will discuss the NEC requirements you need to follow. What is the [&hellip;]","og_url":"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-conforme-normas-do-codigo-nec\/","og_site_name":"KDM Steel","article_published_time":"2025-12-25T08:20:18+00:00","og_image":[{"width":1280,"height":720,"url":"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg","type":"image\/jpeg"}],"author":"KDM Steel","twitter_card":"summary_large_image","twitter_misc":{"Escrito por":"KDM Steel","Tempo estimado de leitura":"10 minutos"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#article","isPartOf":{"@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/"},"author":{"name":"KDM Steel","@id":"https:\/\/www.kdmsteel.com\/#\/schema\/person\/20f9dd106f5824b75813f83f5a192a5f"},"headline":"Junction Box NEC Code Standards","datePublished":"2025-12-25T08:20:18+00:00","mainEntityOfPage":{"@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/"},"wordCount":1827,"commentCount":0,"publisher":{"@id":"https:\/\/www.kdmsteel.com\/#organization"},"image":{"@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#primaryimage"},"thumbnailUrl":"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg","articleSection":["Blog"],"inLanguage":"pt-PT","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/","url":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/","name":"Caixa de Jun\u00e7\u00e3o de acordo com as Normas do C\u00f3digo El\u00e9trico Nacional (NEC) - A\u00e7o KDM","isPartOf":{"@id":"https:\/\/www.kdmsteel.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#primaryimage"},"image":{"@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#primaryimage"},"thumbnailUrl":"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg","datePublished":"2025-12-25T08:20:18+00:00","breadcrumb":{"@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#breadcrumb"},"inLanguage":"pt-PT","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/"]}]},{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#primaryimage","url":"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg","contentUrl":"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/12\/Junction-Box-2.jpg","width":1280,"height":720,"caption":"Junction Box (2)"},{"@type":"BreadcrumbList","@id":"https:\/\/www.kdmsteel.com\/junction-box-nec-code-standards\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.kdmsteel.com\/"},{"@type":"ListItem","position":2,"name":"Junction Box NEC Code Standards"}]},{"@type":"WebSite","@id":"https:\/\/www.kdmsteel.com\/#website","url":"https:\/\/www.kdmsteel.com\/","name":"A\u00e7o KDM","description":"","publisher":{"@id":"https:\/\/www.kdmsteel.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.kdmsteel.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"pt-PT"},{"@type":"Organization","@id":"https:\/\/www.kdmsteel.com\/#organization","name":"A\u00e7o KDM","url":"https:\/\/www.kdmsteel.com\/","logo":{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/www.kdmsteel.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2024\/05\/cropped-kdmsteel-logo.png","contentUrl":"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2024\/05\/cropped-kdmsteel-logo.png","width":998,"height":535,"caption":"KDM Steel"},"image":{"@id":"https:\/\/www.kdmsteel.com\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.kdmsteel.com\/#\/schema\/person\/20f9dd106f5824b75813f83f5a192a5f","name":"A\u00e7o KDM","image":{"@type":"ImageObject","inLanguage":"pt-PT","@id":"https:\/\/secure.gravatar.com\/avatar\/64b16d13078b1bec337dbb31f593dfd16bc530c88ca9fe9b1c9d2a002408080e?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/64b16d13078b1bec337dbb31f593dfd16bc530c88ca9fe9b1c9d2a002408080e?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/64b16d13078b1bec337dbb31f593dfd16bc530c88ca9fe9b1c9d2a002408080e?s=96&d=mm&r=g","caption":"KDM Steel"}}]}},"_links":{"self":[{"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/posts\/47499","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/comments?post=47499"}],"version-history":[{"count":2,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/posts\/47499\/revisions"}],"predecessor-version":[{"id":47505,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/posts\/47499\/revisions\/47505"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/media\/47501"}],"wp:attachment":[{"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/media?parent=47499"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/categories?post=47499"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kdmsteel.com\/pt\/wp-json\/wp\/v2\/tags?post=47499"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}