{"id":47146,"date":"2025-07-13T12:40:55","date_gmt":"2025-07-13T12:40:55","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=47146"},"modified":"2025-07-13T12:49:55","modified_gmt":"2025-07-13T12:49:55","slug":"plastic-vs-metal-junction-box","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/","title":{"rendered":"Voc\u00ea deve escolher uma caixa de jun\u00e7\u00e3o de pl\u00e1stico ou uma caixa de jun\u00e7\u00e3o de metal?"},"content":{"rendered":"<p>Quando se trata de escolher um <a href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao\/\">caixa de jun\u00e7\u00e3o<\/a>, Voc\u00ea tem a op\u00e7\u00e3o de escolher uma caixa de jun\u00e7\u00e3o de pl\u00e1stico ou <a href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-metal\/\">caixa de jun\u00e7\u00e3o de metal<\/a>.<\/p>\n<p>No entanto, sem a informa\u00e7\u00e3o correta sobre a diferen\u00e7a entre os dois, pode ser dif\u00edcil decidir qual \u00e9 o mais adequado. <a href=\"https:\/\/kdmfab.com\/how-to-choose-junction-boxes\/\">material da caixa de jun\u00e7\u00e3o<\/a>.<\/p>\n<p>\u00c9 exatamente por esse motivo que compararemos a principal diferen\u00e7a entre caixas de jun\u00e7\u00e3o de pl\u00e1stico e de metal.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 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-de-plastico-versus-caixa-de-juncao-de-metal\/#Difference_between_Plastic_and_Metal_Junction_Box\" >Diferen\u00e7a entre caixas de jun\u00e7\u00e3o de pl\u00e1stico e de metal<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_Materials\" >\u00b7 Materiais<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_Price_Difference\" >\u2022 Diferen\u00e7a de pre\u00e7o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_Weight\" >\u00b7 Peso<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_Strength_and_Durability\" >\u2022 Resist\u00eancia e durabilidade<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_Corrosion_Resistance\" >\u00b7 Resist\u00eancia \u00e0 corros\u00e3o<\/a><\/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-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_Safety_in_terms_of_Electrical_Conductivity\" >\u2022 Seguran\u00e7a em termos de condutividade el\u00e9trica<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#%C2%B7_EMIRFI_Shielding\" >\u2022 Blindagem EMI\/RFI<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#Plastic_vs_Metal_Junction_Box-Which_one_to_Buy\" >Caixa de jun\u00e7\u00e3o de pl\u00e1stico ou de metal: qual comprar?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-de-juncao-de-plastico-versus-caixa-de-juncao-de-metal\/#Why_Choose_KDM_Junction_Boxes\" >Por que escolher caixas de jun\u00e7\u00e3o KDM?<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Difference_between_Plastic_and_Metal_Junction_Box\"><\/span>Diferen\u00e7a entre caixas de jun\u00e7\u00e3o de pl\u00e1stico e de metal<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-47147 aligncenter\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Difference-between-Plastic-and-Metal-Junction-Box.png\" alt=\"Diferen\u00e7a entre caixas de jun\u00e7\u00e3o de pl\u00e1stico e de metal\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Difference-between-Plastic-and-Metal-Junction-Box.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Difference-between-Plastic-and-Metal-Junction-Box-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Difference-between-Plastic-and-Metal-Junction-Box-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Difference-between-Plastic-and-Metal-Junction-Box-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_Materials\"><\/span>\u00b7 Materiais<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Uma caixa de jun\u00e7\u00e3o de pl\u00e1stico \u00e9 feita de materiais n\u00e3o condutores e dur\u00e1veis. Exemplos desses materiais que voc\u00ea deve conhecer s\u00e3o policarbonato, cloreto de polivinila (PVC), acrilonitrila butadieno estireno (ABS) e fibra de vidro.<\/p>\n<p>Por outro lado, uma caixa de jun\u00e7\u00e3o met\u00e1lica \u00e9 feita de material met\u00e1lico condutor. Exemplos desses materiais incluem alum\u00ednio, a\u00e7o inoxid\u00e1vel ou ferro fundido.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_Price_Difference\"><\/span>\u2022 Diferen\u00e7a de pre\u00e7o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As caixas de jun\u00e7\u00e3o de pl\u00e1stico s\u00e3o geralmente mais acess\u00edveis do que as de metal. Quando se consideram os pre\u00e7os dos materiais, os custos de fabrica\u00e7\u00e3o e instala\u00e7\u00e3o, as caixas de jun\u00e7\u00e3o de pl\u00e1stico levam vantagem.<\/p>\n<p>Embora pl\u00e1sticos de alto desempenho, como o policarbonato, possam ser caros, o custo n\u00e3o se compara ao da maioria das caixas de jun\u00e7\u00e3o met\u00e1licas.<\/p>\n<p>No entanto, ao analisar as caixas de jun\u00e7\u00e3o met\u00e1licas, percebe-se que o custo de produ\u00e7\u00e3o, instala\u00e7\u00e3o e pre\u00e7o inicial dos materiais \u00e9 muito alto. Materiais como alum\u00ednio, a\u00e7o e ferro fundido s\u00e3o muito caros.<\/p>\n<p>Al\u00e9m disso, esses materiais exigem um extenso trabalho de fabrica\u00e7\u00e3o, que normalmente \u00e9 realizado por pessoal altamente qualificado, tornando o processo muito caro.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_Weight\"><\/span>\u00b7 Peso<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As caixas de jun\u00e7\u00e3o n\u00e3o met\u00e1licas, como as de PVC, s\u00e3o geralmente mais leves do que as met\u00e1licas. Isso ocorre porque os materiais usados na fabrica\u00e7\u00e3o de caixas de jun\u00e7\u00e3o pl\u00e1sticas, como a fibra de vidro, t\u00eam densidade muito baixa.<\/p>\n<p>Isso torna-os muito f\u00e1ceis de manusear e instalar, al\u00e9m de aumentar sua mobilidade.<\/p>\n<p>Em contrapartida, os materiais utilizados na constru\u00e7\u00e3o de caixas de jun\u00e7\u00e3o met\u00e1licas possuem uma densidade excepcionalmente alta, o que as torna muito pesadas.<\/p>\n<p>A natureza pesada das caixas de jun\u00e7\u00e3o met\u00e1licas torna os processos de instala\u00e7\u00e3o e fabrica\u00e7\u00e3o muito complexos. Note-se que isso tamb\u00e9m prejudica a sua mobilidade, dificultando o seu manuseio.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_Strength_and_Durability\"><\/span>\u2022 Resist\u00eancia e durabilidade<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Desde caixas de jun\u00e7\u00e3o em PVC e policarbonato at\u00e9 caixas de prote\u00e7\u00e3o em ABS, elas n\u00e3o s\u00e3o t\u00e3o dur\u00e1veis quanto as caixas de jun\u00e7\u00e3o met\u00e1licas.<\/p>\n<p>No entanto, isso n\u00e3o significa que as caixas de jun\u00e7\u00e3o n\u00e3o met\u00e1licas n\u00e3o sejam suficientemente resistentes.<\/p>\n<p>Em geral, as caixas de jun\u00e7\u00e3o met\u00e1licas s\u00e3o muito resistentes e suportam ambientes agressivos. Veja, por exemplo, <a href=\"https:\/\/www.kdmsteel.com\/pt\/caixa-eletrica-para-mineracao\/\">caixas e inv\u00f3lucros el\u00e9tricos para minera\u00e7\u00e3o<\/a>.<\/p>\n<p>Com caixas de jun\u00e7\u00e3o em a\u00e7o inoxid\u00e1vel ou alum\u00ednio, voc\u00ea pode esperar uma caixa el\u00e9trica capaz de suportar condi\u00e7\u00f5es extremas. Mesmo nas piores situa\u00e7\u00f5es, essas caixas de jun\u00e7\u00e3o garantem um desempenho superior.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_Corrosion_Resistance\"><\/span>\u00b7 Resist\u00eancia \u00e0 corros\u00e3o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>A maioria das caixas de jun\u00e7\u00e3o de pl\u00e1stico tende a ter um desempenho superior \u00e0s caixas de jun\u00e7\u00e3o met\u00e1licas. Por exemplo, as caixas de jun\u00e7\u00e3o de policarbonato oferecem desempenho superior na maioria das condi\u00e7\u00f5es clim\u00e1ticas.<\/p>\n<p>Embora as caixas de jun\u00e7\u00e3o de a\u00e7o inoxid\u00e1vel e alum\u00ednio ofere\u00e7am melhor desempenho em termos de resist\u00eancia \u00e0 corros\u00e3o, os pl\u00e1sticos s\u00e3o op\u00e7\u00f5es superiores. De fato, as caixas de jun\u00e7\u00e3o met\u00e1licas podem exigir tratamento adicional para igualar as caixas de jun\u00e7\u00e3o n\u00e3o met\u00e1licas.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_Safety_in_terms_of_Electrical_Conductivity\"><\/span>\u2022 Seguran\u00e7a em termos de condutividade el\u00e9trica<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As caixas de jun\u00e7\u00e3o de pl\u00e1stico s\u00e3o geralmente mais seguras do que as de metal. Isso ocorre porque s\u00e3o feitas basicamente de materiais n\u00e3o condutores, como policarbonato, PVC, ABS, etc. Isso praticamente elimina os riscos de acidentes el\u00e9tricos e fatalidades.<\/p>\n<p>Essas caixas de jun\u00e7\u00e3o n\u00e3o requerem aterramento em nenhum ponto espec\u00edfico, o que as torna ideais para aplica\u00e7\u00f5es internas de f\u00e1cil acesso.<\/p>\n<p>No entanto, as caixas de jun\u00e7\u00e3o met\u00e1licas s\u00e3o feitas de materiais condutores. Esses materiais permitem a passagem de corrente el\u00e9trica, representando um alto risco para os usu\u00e1rios.<\/p>\n<p>A \u00fanica maneira eficaz de tornar essas caixas de jun\u00e7\u00e3o met\u00e1licas mais seguras para trabalhar \u00e9 garantir que estejam devidamente aterradas.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%C2%B7_EMIRFI_Shielding\"><\/span>\u2022 Blindagem EMI\/RFI<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>As caixas de jun\u00e7\u00e3o met\u00e1licas oferecem maior blindagem contra interfer\u00eancia eletromagn\u00e9tica e de radiofrequ\u00eancia (EMI\/RFI) em compara\u00e7\u00e3o com as caixas de jun\u00e7\u00e3o pl\u00e1sticas. Isso ocorre porque as caixas de jun\u00e7\u00e3o met\u00e1licas conduzem eletricidade e, portanto, exigem blindagem superior para evitar interfer\u00eancias eletromagn\u00e9ticas e de radiofrequ\u00eancia.<\/p>\n<p>Isso \u00e9 crucial, visto que o equipamento opera em locais muito sens\u00edveis, como centros de dados ou instala\u00e7\u00f5es m\u00e9dicas delicadas. Observe que a blindagem \u00e9 projetada para evitar distor\u00e7\u00e3o do sinal e interfer\u00eancia na transmiss\u00e3o de frequ\u00eancia em circuitos pr\u00f3ximos.<\/p>\n<p>No entanto, devido \u00e0 sua natureza n\u00e3o condutora, as caixas de jun\u00e7\u00e3o de pl\u00e1stico n\u00e3o necessitam de blindagem EMI\/RFI. Isso as torna inadequadas para ambientes onde ru\u00eddos el\u00e9tricos possam interferir em equipamentos sens\u00edveis.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-47148 aligncenter\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Plastic-vs-Metal-Junction-Box-Which-one-to-Buy.png\" alt=\"Caixa de jun\u00e7\u00e3o de pl\u00e1stico ou de metal: qual comprar?\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Plastic-vs-Metal-Junction-Box-Which-one-to-Buy.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Plastic-vs-Metal-Junction-Box-Which-one-to-Buy-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Plastic-vs-Metal-Junction-Box-Which-one-to-Buy-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Plastic-vs-Metal-Junction-Box-Which-one-to-Buy-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Plastic_vs_Metal_Junction_Box-Which_one_to_Buy\"><\/span>Caixa de jun\u00e7\u00e3o de pl\u00e1stico ou de metal: qual comprar?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A escolha entre uma caixa de jun\u00e7\u00e3o de pl\u00e1stico ou de metal depender\u00e1 inteiramente das suas necessidades, ou seja, das aplica\u00e7\u00f5es espec\u00edficas e de outros fatores, como o custo.<\/p>\n<p>No entanto, em geral, voc\u00ea encontrar\u00e1 caixas de jun\u00e7\u00e3o de pol\u00edmero em ambientes residenciais. Normalmente, isso se deve \u00e0 sua leveza, grande mobilidade e pre\u00e7o acess\u00edvel.<\/p>\n<p>Por outro lado, a caixa de jun\u00e7\u00e3o met\u00e1lica \u00e9 preferida para uso em \u00e1reas industriais. Isso se deve \u00e0 sua robustez, resist\u00eancia ao fogo e blindagem contra interfer\u00eancia eletromagn\u00e9tica (EMI).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Why_Choose_KDM_Junction_Boxes\"><\/span>Por que escolher caixas de jun\u00e7\u00e3o KDM?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-47150 aligncenter\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Why-Choose-KDM-Junction-Boxes-1.png\" alt=\"Por que escolher caixas de jun\u00e7\u00e3o KDM?\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Why-Choose-KDM-Junction-Boxes-1.png 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Why-Choose-KDM-Junction-Boxes-1-150x84.png 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Why-Choose-KDM-Junction-Boxes-1-768x432.png 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2025\/07\/Why-Choose-KDM-Junction-Boxes-1-18x10.png 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>Como l\u00edder de mercado e refer\u00eancia na fabrica\u00e7\u00e3o de caixas de jun\u00e7\u00e3o na China, a KDMSTEEL oferece uma ampla gama de op\u00e7\u00f5es de materiais. De a\u00e7o inoxid\u00e1vel, alum\u00ednio, a\u00e7o galvanizado e PVC a caixas de jun\u00e7\u00e3o de policarbonato.<\/p>\n<p>Nossas caixas de jun\u00e7\u00e3o s\u00e3o fabricadas de acordo com as normas de seguran\u00e7a NEMA, IEC e UL. Dependendo dos requisitos espec\u00edficos da sua aplica\u00e7\u00e3o, a KDM personaliza cada caixa de jun\u00e7\u00e3o para atender \u00e0s necessidades espec\u00edficas do cliente.<\/p>\n<p>Com anos de experi\u00eancia na fabrica\u00e7\u00e3o de caixas de jun\u00e7\u00e3o na China, nossos engenheiros ajudar\u00e3o voc\u00ea a obter caixas el\u00e9tricas de alto desempenho para suas instala\u00e7\u00f5es. <a href=\"https:\/\/www.kdmsteel.com\/pt\/contato\/\">Entre em contato conosco agora mesmo para qualquer d\u00favida.<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>When it comes to choosing a junction box, you have an option of going for plastic junction box or metal junction box. However, without the right information about the difference between these two, it can be difficult to decide on the right junction box material. 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