{"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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/","title":{"rendered":"\u63a5\u7ebf\u76d2 NEC \u89c4\u8303\u6807\u51c6"},"content":{"rendered":"<p>\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u4f5c\u4e3a\u7f8e\u56fd\u7535\u6c14\u88c5\u7f6e\u6700\u4f4e\u5b89\u5168\u8981\u6c42\uff0c\u4e3a\u5404\u884c\u5404\u4e1a\u63d0\u4f9b\u4e86\u5168\u9762\u7684\u6307\u5bfc\u3002NEC \u5177\u4f53\u89c4\u5b9a\u4e86\u54ea\u4e9b\u7535\u6c14\u6807\u51c6\uff1f\u5982\u679c\u60a8\u9700\u8981\u5728\u5efa\u7b51\u7269\u5185\u4f7f\u7528\u63a5\u7ebf\u76d2\u5b89\u88c5\u7535\u6c14\u7ebf\u8def\u7cfb\u7edf\uff0c\u672c\u6587\u5c06\u63a2\u8ba8\u60a8\u9700\u8981\u9075\u5faa\u7684 NEC \u8981\u6c42\u3002.<\/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\">\u76ee\u5f55<\/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=\"\u5207\u6362\u76ee\u5f55\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u5207\u6362<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#What_is_the_NEC_Code\" >\u4ec0\u4e48\u662fNEC\u89c4\u8303\uff1f<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#How_NEC_is_Updated_and_Maintained\" >NEC\u7684\u66f4\u65b0\u548c\u7ef4\u62a4\u65b9\u5f0f<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_Requirements_for_Junction_Boxes_and_Enclosures\" >\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u5bf9\u63a5\u7ebf\u76d2\u548c\u5916\u58f3\u7684\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_31428%E2%80%94Junction_Box_Material\" >NEC 314.28\u2014\u2014\u63a5\u7ebf\u76d2\u6750\u6599<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Material_Requirements\" >\u7269\u6599\u9700\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#IP_Rating_Requirements\" >IP\u8bc4\u7ea7\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_31416%E2%80%94Volume_Size_of_the_Junction_Box\" >NEC 314.16\u2014\u2014\u63a5\u7ebf\u76d2\u7684\u4f53\u79ef\u5c3a\u5bf8<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Method_of_Determining_the_Correct_Volume\" >\u786e\u5b9a\u6b63\u786e\u4f53\u79ef\u7684\u65b9\u6cd5<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Box_Fill_Requirements\" >\u5305\u88c5\u76d2\u586b\u5145\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_370-29%E2%80%94Junction_Boxes_in_Hazardous_Locations\" >NEC 370-29\u2014\u2014\u5371\u9669\u573a\u6240\u7684\u63a5\u7ebf\u76d2<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Special_Requirements_for_Hazardous_Areas\" >\u5371\u9669\u533a\u57df\u7684\u7279\u6b8a\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Installation_Restrictions\" >\u5b89\u88c5\u9650\u5236<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_31429%E2%80%94Junction_Box_in_Non-Hazardous_Locations\" >NEC 314.29\u2014\u2014\u975e\u5371\u9669\u573a\u6240\u7684\u63a5\u7ebf\u76d2<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_Requirements\" >NEC \u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Cover_Requirements\" >\u627f\u4fdd\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_250110%E2%80%94Grounding_Requirements\" >NEC 250.110\u2014\u2014\u63a5\u5730\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Grounding_for_Metal_Junction_Boxes\" >\u91d1\u5c5e\u63a5\u7ebf\u76d2\u63a5\u5730<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Grounding_for_Non-Metallic_Junction_Boxes\" >\u975e\u91d1\u5c5e\u63a5\u7ebf\u76d2\u7684\u63a5\u5730<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#NEC_11026-Clearance_Requirements\" >NEC 110.26-\u51c0\u7a7a\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Clearance_Operation_Requirements\" >\u5b89\u5168\u8bb8\u53ef\u64cd\u4f5c\u8981\u6c42<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Accessibility_Rules\" >\u65e0\u969c\u788d\u89c4\u5219<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#How_to_Avoid_Common_NEC_Violations\" >\u5982\u4f55\u907f\u514d\u5e38\u89c1\u7684NEC\u8fdd\u89c4\u884c\u4e3a<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Junction_Box_Overload\" >\u63a5\u7ebf\u76d2\u8fc7\u8f7d<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Improper_Equipment_Wiring\" >\u8bbe\u5907\u63a5\u7ebf\u4e0d\u5f53<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Using_the_Incorrect_Type_of_Junction_Box\" >\u4f7f\u7528\u9519\u8bef\u7684\u63a5\u7ebf\u76d2\u7c7b\u578b<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Excessive_Filling_of_Conduit_or_Cable_Trays\" >\u5bfc\u7ba1\u6216\u7535\u7f06\u6865\u67b6\u586b\u5145\u8fc7\u91cf<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#FAQ\" >\u5e38\u95ee\u95ee\u9898<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#What_Are_the_Differences_for_Enclosures_Between_NEMA_and_NEC\" >NEMA \u548c NEC \u5bf9\u5916\u58f3\u7684\u8981\u6c42\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#How_to_Choose_a_Junction_Box_of_the_Appropriate_Volume\" >\u5982\u4f55\u9009\u62e9\u5408\u9002\u5bb9\u91cf\u7684\u63a5\u7ebf\u76d2\uff1f<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Is_the_Covering_Junction_Box_Safe_and_Complies_with_NEC_Regulations\" >\u8be5\u63a5\u7ebf\u76d2\u76d6\u662f\u5426\u5b89\u5168\u5e76\u7b26\u5408NEC\u89c4\u8303\uff1f<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#What_Consequences_can_be_Caused_by_Incorrect_Grounding_of_the_Junction_Box\" >\u63a5\u7ebf\u76d2\u63a5\u5730\u9519\u8bef\u4f1a\u9020\u6210\u54ea\u4e9b\u540e\u679c\uff1f<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/#Final_Thought\" >\u6700\u540e\u60f3\u8bf4<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_is_the_NEC_Code\"><\/span>\u4ec0\u4e48\u662fNEC\u89c4\u8303\uff1f<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=\"NEC\u89c4\u8303\" 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>\u300a\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303\u300b(NEC) \u662f\u7531\u975e\u653f\u5e9c\u7ec4\u7ec7\u5236\u5b9a\u7684\u793a\u8303\u6027\u6cd5\u89c4\u6587\u672c\uff0c\u662f\u4fdd\u969c\u4eba\u8eab\u548c\u8d22\u4ea7\u5b89\u5168\u7684\u6700\u4f4e\u5b89\u5168\u8981\u6c42\u3002NEC \u65e8\u5728\u63a8\u5e7f\u6b63\u786e\u7684\u7535\u6c14\u5e03\u7ebf\uff0c\u5e76\u4e3a\u7535\u6c14\u5b89\u88c5\u548c\u8bbe\u5907\u63d0\u4f9b\u5168\u9762\u7684\u6307\u5bfc\u3002NEC \u8be6\u7ec6\u89c4\u5b9a\u4e86\u7535\u6c14\u7cfb\u7edf\u5b89\u88c5\u7684\u5b89\u5168\u65b9\u6cd5\uff0c\u5e76\u63d0\u4f9b\u4e86\u5168\u9762\u7684\u5b89\u5168\u9884\u9632\u63aa\u65bd\u3002\u6309\u7167\u6307\u5bfc\u5185\u5bb9\u6b63\u786e\u5b89\u88c5\u6709\u52a9\u4e8e\u9884\u9632\u706b\u707e\u3001\u89e6\u7535\u548c\u6545\u969c\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_NEC_is_Updated_and_Maintained\"><\/span>NEC\u7684\u66f4\u65b0\u548c\u7ef4\u62a4\u65b9\u5f0f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>NEC\u4ee3\u7801<a href=\"https:\/\/www.kdmsteel.com\/zh\/\u63a5\u7ebf\u76d2\u5916\u58f3\/\">\u63a5\u7ebf\u76d2<\/a>\u00a0NEC\u672c\u8eab\u4e0d\u5177\u6709\u6cd5\u5f8b\u6548\u529b\uff0c\u4f46\u7f8e\u56fd\u5927\u591a\u6570\u5dde\u5df2\u5c06\u5176\u6b63\u5f0f\u91c7\u7eb3\u4e3a\u5404\u81ea\u7ba1\u8f96\u8303\u56f4\u5185\u7684\u7535\u6c14\u6cd5\u89c4\u3002NEC\u7684\u4e25\u8c28\u7f16\u5199\u548c\u5e7f\u6cdb\u5e94\u7528\u4f7f\u5176\u6210\u4e3a\u56fd\u9645\u4e0a\u6700\u5177\u5f71\u54cd\u529b\u7684\u7535\u6c14\u89c4\u8303\uff0c\u5e76\u5df2\u6210\u4e3a\u4fdd\u9669\u548c\u53f8\u6cd5\u4f53\u7cfb\u7684\u57fa\u77f3\u3002.<\/p>\n<p>NEC\u6743\u5a01\u6027\u7684\u4e00\u4e2a\u4e3b\u8981\u65b9\u9762\u6e90\u4e8e\u5176\u5148\u8fdb\u7684\u6280\u672f\u548c\u5b89\u5168\u4fdd\u969c\u3002\u5b83\u6bcf\u4e09\u5e74\u66f4\u65b0\u4fee\u8ba2\u4e00\u6b21\uff0c\u5e76\u7531\u4e13\u5bb6\u5c0f\u7ec4\u8fdb\u884c\u5ba1\u67e5\uff0c\u4ee5\u786e\u4fdd\u7535\u6c14\u5b89\u88c5\u66f4\u52a0\u5b89\u5168\u9ad8\u6548\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"NEC_Requirements_for_Junction_Boxes_and_Enclosures\"><\/span>\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u5bf9\u63a5\u7ebf\u76d2\u548c\u5916\u58f3\u7684\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u5bf9\u63a5\u7ebf\u76d2\u7684\u5404\u4e2a\u65b9\u9762\u90fd\u6709\u5177\u4f53\u8981\u6c42\uff0c\u4ee5\u786e\u4fdd\u6b63\u786e\u7684\u7535\u6c14\u5e03\u7ebf\u548c\u5b89\u5168\u6027\u3002\u4ee5\u4e0b\u662f NEC \u5bf9\u63a5\u7ebf\u76d2\u7684\u4e00\u4e9b\u5177\u4f53\u8981\u6c42\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_31428%E2%80%94Junction_Box_Material\"><\/span>NEC 314.28\u2014\u2014\u63a5\u7ebf\u76d2\u6750\u6599<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7b2c 314.28 \u6761\u89c4\u5b9a\u4e86\u63a5\u7ebf\u76d2\u7684\u6750\u6599\u9009\u62e9\uff0c\u901a\u5e38\u7531\u91d1\u5c5e\u6216\u5851\u6599\u5236\u6210\u3002\u60a8\u53ef\u4ee5\u6839\u636e\u5b89\u88c5\u73af\u5883\u81ea\u884c\u8bc4\u4f30\uff0c\u9009\u62e9\u5408\u9002\u7684\u63a5\u7ebf\u76d2\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Material_Requirements\"><\/span>\u7269\u6599\u9700\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u63a5\u7ebf\u76d2\u7684\u751f\u4ea7\u901a\u5e38\u91c7\u7528\u4e0d\u9508\u94a2\u548cPVC\u7b49\u4e0d\u53ef\u71c3\u6750\u6599\u3002\u5f53\u7136\uff0c\u5728\u9009\u62e9\u63a5\u7ebf\u76d2\u6750\u6599\u65f6\uff0c\u4e5f\u5e94\u8003\u8651\u5404\u79cd\u4e0d\u540c\u7684\u4f7f\u7528\u73af\u5883\u3002.<\/p>\n<p>\u4f8b\u5982\uff0c\u5982\u679c\u60a8\u7684\u5b89\u88c5\u73af\u5883\u6f6e\u6e7f\uff0c\u6c34\u5206\u5f88\u5bb9\u6613\u6e17\u5165\u63a5\u7ebf\u76d2\uff0c\u4ece\u800c\u5bf9\u7535\u6c14\u5b89\u5168\u6784\u6210\u5a01\u80c1\u3002\u56e0\u6b64\uff0c\u60a8\u9700\u8981\u4f7f\u7528\u5177\u6709\u5408\u9002\u9632\u6f6e\u7b49\u7ea7\u7684\u63a5\u7ebf\u76d2\u3002.<\/p>\n<p>\u5982\u679c\u5b89\u88c5\u5728\u8150\u8680\u6027\u73af\u5883\u4e2d\uff0c\u53ef\u4ee5\u9009\u62e9\u91d1\u5c5e\u63a5\u7ebf\u76d2\uff0c\u4f8b\u5982\u7531\u2026\u2026\u5236\u6210\u7684\u63a5\u7ebf\u76d2\u3002 <a href=\"https:\/\/www.kdmsteel.com\/zh\/\u7535\u6c14\u5916\u58f3\/\u4e0d\u9508\u94a2\u7535\u5668\u5916\u58f3\/\">\u4e0d\u9508\u94a2<\/a>\u00a0\u548c <a href=\"https:\/\/www.kdmsteel.com\/zh\/\u94dd\u5236\u5916\u58f3\/\">\u94dd<\/a>. \u8fd9\u79cd\u6750\u6599\u8150\u8680\u7387\u4f4e\uff0c\u80fd\u9632\u6b62\u751f\u9508\u548c\u52a3\u5316\uff0c\u786e\u4fdd\u66f4\u957f\u7684\u4f7f\u7528\u5bff\u547d\u3002.<\/p>\n<p>\u5982\u679c\u4f7f\u7528\u5851\u6599\u7535\u7bb1\uff0c\u5219\u5e94\u4f7f\u5176\u80fd\u591f\u627f\u53d7\u7d2b\u5916\u7ebf\u548c\u6f6e\u6e7f\u7b49\u6076\u52a3\u73af\u5883\u6761\u4ef6\uff0c\u5e76\u4e14\u5176\u6784\u9020\u5e94\u4e25\u683c\u7b26\u5408\u7535\u6c14\u73af\u5883\u7684\u8981\u6c42\u3002.<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=\"2\u30013\u30014\u4f4d\u63a5\u7ebf\u76d2\" 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>IP\u8bc4\u7ea7\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u65e0\u8bba\u63a5\u7ebf\u76d2\u91c7\u7528\u4f55\u79cd\u6750\u6599\uff0cNEC \u90fd\u89c4\u5b9a\u5176\u5fc5\u987b\u5177\u5907\u4e00\u5b9a\u7684\u5f3a\u5ea6\u3002 <a href=\"https:\/\/www.kdmsteel.com\/zh\/ip-\u5916\u58f3\/\">\u9632\u62a4\u7b49\u7ea7\uff08IP\uff09<\/a>. IP\u9632\u62a4\u7b49\u7ea7\u51b3\u5b9a\u4e86\u8bbe\u5907\u9632\u6f6e\u9632\u5c18\u7684\u80fd\u529b\u3002\u8fd9\u5bf9\u4e8e\u6237\u5916\u3001\u5de5\u5382\u548c\u6f6e\u6e7f\u751f\u4ea7\u73af\u5883\u4e2d\u7684\u7535\u6c14\u5b89\u5168\u81f3\u5173\u91cd\u8981\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_31416%E2%80%94Volume_Size_of_the_Junction_Box\"><\/span>NEC 314.16\u2014\u2014\u63a5\u7ebf\u76d2\u7684\u4f53\u79ef\u5c3a\u5bf8<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>NEC 314.16 \u8be6\u7ec6\u89c4\u5b9a\u4e86\u4e0d\u540c\u7c7b\u578b\u7535\u7ebf\u7684\u63a5\u7ebf\u76d2\u6240\u9700\u7684\u6700\u5c0f\u5bb9\u79ef\u3002\u5176\u6838\u5fc3\u5728\u4e8e\u786e\u4fdd\u63a5\u7ebf\u76d2\u5185\u6709\u8db3\u591f\u7684\u7a7a\u95f4\u5bb9\u7eb3\u7535\u7ebf\u3001\u8fde\u63a5\u5668\u548c\u8bbe\u5907\uff0c\u4ee5\u907f\u514d\u56e0\u8fc7\u5ea6\u62e5\u6324\u800c\u5bfc\u81f4\u8fc7\u70ed\u3001\u7edd\u7f18\u635f\u574f\u6216\u8fde\u63a5\u6545\u969c\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Method_of_Determining_the_Correct_Volume\"><\/span>\u786e\u5b9a\u6b63\u786e\u4f53\u79ef\u7684\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u89c4\u5b9a\u4f7f\u7528\u7acb\u65b9\u82f1\u5bf8\u6765\u6d4b\u91cf\u4f53\u79ef\u3002\u901a\u5e38\uff0c\u6240\u9700\u7684\u4f53\u79ef\u53d6\u51b3\u4e8e\u63a5\u7ebf\u76d2\u5185\u9700\u8981\u5bb9\u7eb3\u7684\u7535\u7ebf\u6570\u91cf\u548c\u5c3a\u5bf8\uff0c\u4ee5\u53ca\u5b89\u88c5\u5728\u5176\u4e2d\u7684\u4efb\u4f55\u8bbe\u5907\uff0c\u4f8b\u5982\u63a5\u5934\u3001\u5f00\u5173\u548c\u63d2\u5ea7\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Box_Fill_Requirements\"><\/span>\u5305\u88c5\u76d2\u586b\u5145\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u4e3a\u786e\u4fdd\u5408\u7406\u7684\u5e03\u7ebf\u5e03\u5c40\u548c\u7535\u6c14\u5b89\u5168\uff0c\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u660e\u786e\u89c4\u5b9a\u4e86\u4e0d\u540c\u7ebf\u5f84\u548c\u7ebf\u6570\u6240\u9700\u7684\u63a5\u7ebf\u76d2\u7684\u6700\u5c0f\u5c3a\u5bf8\u548c\u5bb9\u79ef\u3002\u4f8b\u5982\uff0c18 \u7acb\u65b9\u82f1\u5bf8\u7684\u63a5\u7ebf\u76d2\u6700\u591a\u53ef\u5bb9\u7eb3\u4e09\u5230\u516d\u6839\u7535\u7ebf\uff0c\u800c 20 \u7acb\u65b9\u82f1\u5bf8\u7684\u63a5\u7ebf\u76d2\u6700\u591a\u53ef\u5bb9\u7eb3\u4e03\u5230\u516b\u6839\u7535\u7ebf\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_370-29%E2%80%94Junction_Boxes_in_Hazardous_Locations\"><\/span>NEC 370-29\u2014\u2014\u5371\u9669\u573a\u6240\u7684\u63a5\u7ebf\u76d2<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=\"\u5851\u6599\u63a5\u7ebf\u76d2\uff082\uff09\" 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>\u5728\u5371\u9669\u573a\u6240\u751f\u4ea7\u63a5\u7ebf\u76d2\u65f6\uff0c\u5fc5\u987b\u9009\u7528\u4e13\u7528\u6750\u6599\u3002\u8fd9\u7c7b\u63a5\u7ebf\u76d2\u901a\u5e38\u5e94\u7528\u4e8e\u5b58\u5728\u6613\u71c3\u6c14\u4f53\u548c\u7c89\u5c18\u7684\u73af\u5883\u4e2d\u3002\u56e0\u6b64\uff0c\u5176\u751f\u4ea7\u5fc5\u987b\u7b26\u5408\u7279\u5b9a\u7684\u5b89\u5168\u6807\u51c6\uff0c\u4ee5\u9632\u6b62\u53d1\u751f\u5927\u89c4\u6a21\u7206\u70b8\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Special_Requirements_for_Hazardous_Areas\"><\/span>\u5371\u9669\u533a\u57df\u7684\u7279\u6b8a\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5bf9\u4e8e\u5371\u9669\u533a\u57df\u7684\u63a5\u7ebf\u76d2\uff0c\u5fc5\u987b\u4e25\u683c\u5bc6\u5c01\uff0c\u9632\u6b62\u6613\u71c3\u6c14\u4f53\u6cc4\u6f0f\u3002\u540c\u65f6\uff0c\u63a5\u7ebf\u76d2\u8fd8\u5fc5\u987b\u5177\u5907\u9632\u7206\u6027\u80fd\u3002\u5373\u4f7f\u5185\u90e8\u53d1\u751f\u7206\u70b8\uff0c\u63a5\u7ebf\u76d2\u4e5f\u4e0d\u5e94\u53d7\u635f\uff0c\u4ee5\u514d\u5f15\u53d1\u5927\u89c4\u6a21\u7206\u70b8\u6216\u706b\u707e\u3002.<\/p>\n<p>\u6b64\u5916\uff0c\u5b83\u8fd8\u9700\u8981\u9632\u6b62\u9759\u7535\u5f15\u53d1\u706b\u707e\u3002\u6d88\u9664\u9759\u7535\u662f\u5176\u4e00\u9879\u57fa\u672c\u529f\u80fd\u3002\u4e0d\u540c\u7684\u63a5\u7ebf\u76d2\u9700\u8981\u6e05\u6670\u7684\u6807\u7b7e\uff0c\u4f8b\u5982\u5371\u9669\u6807\u5fd7\u548c\u6700\u9ad8\u6e29\u5ea6\u7b49\u7ea7\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Installation_Restrictions\"><\/span>\u5b89\u88c5\u9650\u5236<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u63a5\u7ebf\u76d2\u4e0d\u5f97\u9690\u85cf\u5728\u5929\u82b1\u677f\u3001\u5899\u58c1\u6216\u9601\u697c\u3001\u5730\u677f\u4e0b\u7b49\u96be\u4ee5\u8fdb\u5165\u7684\u7a7a\u95f4\u5185\u3002.<\/p>\n<p>\u4e0d\u5f97\u5c06\u5176\u653e\u7f6e\u5728\u6613\u71c3\u6c14\u4f53\u6216\u7c89\u5c18\u53ef\u80fd\u5f15\u8d77\u706b\u707e\u6216\u7206\u70b8\u7684\u533a\u57df\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_31429%E2%80%94Junction_Box_in_Non-Hazardous_Locations\"><\/span>NEC 314.29\u2014\u2014\u975e\u5371\u9669\u573a\u6240\u7684\u63a5\u7ebf\u76d2<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"NEC_Requirements\"><\/span>NEC \u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5bf9\u4e8e\u975e\u5371\u9669\u533a\u57df\u7684\u63a5\u7ebf\u76d2\uff0cNEC\u660e\u786e\u89c4\u5b9a\uff0c\u5fc5\u987b\u5c06\u5176\u5b89\u88c5\u5728\u6613\u4e8e\u7ef4\u62a4\u548c\u68c0\u67e5\u7684\u4f4d\u7f6e\u3002\u5b89\u88c5\u4f4d\u7f6e\u5468\u56f4\u4e0d\u5e94\u6709\u4efb\u4f55\u969c\u788d\u7269\uff0c\u4ee5\u786e\u4fdd\u5b89\u5168\u64cd\u4f5c\u548c\u7ef4\u62a4\u3002\u6b64\u5916\uff0c\u63a5\u7ebf\u76d2\u9700\u8981\u7262\u56fa\u652f\u6491\uff0c\u4ee5\u9632\u6b62\u957f\u671f\u4f7f\u7528\u9020\u6210\u7684\u79fb\u4f4d\u548c\u677e\u52a8\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Cover_Requirements\"><\/span>\u627f\u4fdd\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u76d6\u5b50\u5fc5\u987b\u7262\u56fa\u56fa\u5b9a\uff0c\u901a\u5e38\u7528\u87ba\u4e1d\u62e7\u7d27\u3002\u76d6\u5b50\u8d85\u51fa\u8fb9\u7f18\u7684\u8ddd\u79bb\u6700\u591a\u4e0d\u5e94\u8d85\u8fc7 1\/8 \u82f1\u5bf8\uff0c\u8fd9\u6837\u53ef\u4ee5\u6709\u6548\u9632\u6b62\u610f\u5916\u89e6\u7535\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_250110%E2%80%94Grounding_Requirements\"><\/span>NEC 250.110\u2014\u2014\u63a5\u5730\u8981\u6c42<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=\"\u63a5\u7ebf\u76d2\u63a5\u5730\u8981\u6c42\" 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>\u7b2c250.110\u6761\u89c4\u5b9a\u4e86\u7535\u6c14\u8bbe\u5907\u7684\u63a5\u5730\u6807\u51c6\u3002\u901a\u8fc7\u5c06\u63a5\u7ebf\u76d2\u63a5\u5730\uff0c\u4e3a\u6545\u969c\u7535\u6d41\u7684\u56de\u6d41\u63d0\u4f9b\u5b89\u5168\u8def\u5f84\uff0c\u662f\u9632\u6b62\u89e6\u7535\u548c\u706b\u707e\u7684\u6709\u6548\u63aa\u65bd\u3002\u8be5\u63aa\u65bd\u4e3b\u8981\u5305\u62ec\u5c06\u63a5\u5730\u5bfc\u4f53\u8fde\u63a5\u5230\u63a5\u7ebf\u76d2\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Grounding_for_Metal_Junction_Boxes\"><\/span>\u91d1\u5c5e\u63a5\u7ebf\u76d2\u63a5\u5730<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u63a5\u7ebf\u76d2\u5185\u7684\u91d1\u5c5e\u90e8\u4ef6\u5fc5\u987b\u8fde\u63a5\u5230\u63a5\u5730\u7cfb\u7edf\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u63a5\u5730\u7ebf\u7684\u5c3a\u5bf8\u5fc5\u987b\u4e0e\u63a5\u7ebf\u76d2\u7684\u5c3a\u5bf8\u76f8\u5339\u914d\u3002\u91d1\u5c5e\u63a5\u7ebf\u76d2\u5e94\u901a\u8fc7\u5728\u87ba\u7eb9\u5b54\u5185\u5b89\u88c5\u63a5\u5730\u87ba\u9489\u8fdb\u884c\u63a5\u5730\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Grounding_for_Non-Metallic_Junction_Boxes\"><\/span>\u975e\u91d1\u5c5e\u63a5\u7ebf\u76d2\u7684\u63a5\u5730<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5bf9\u4e8e\u5851\u6599\u7b49\u975e\u91d1\u5c5e\u63a5\u7ebf\u76d2\uff0c\u4ecd\u7136\u9700\u8981\u4f7f\u7528\u7b26\u5408\u89c4\u8303\u7684\u63a5\u5730\u5939\u6216\u63a5\u5730\u5bfc\u4f53\u5c06\u5176\u5b89\u88c5\u5728\u9002\u5f53\u7684\u4f4d\u7f6e\u3002\u7136\u540e\uff0c\u5e94\u6309\u7167\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u7684\u89c4\u8303\u63a5\u5730\u65b9\u6cd5\u8fdb\u884c\u63a5\u5730\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NEC_11026-Clearance_Requirements\"><\/span>NEC 110.26-\u51c0\u7a7a\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7b2c 110.26 \u6761\u4e3b\u8981\u89c4\u5b9a\u4e86\u63a5\u7ebf\u76d2\u4e0e\u5176\u4ed6\u7535\u6c14\u8bbe\u5907\u4e4b\u95f4\u7684\u5b89\u5168\u8ddd\u79bb\uff0c\u5e76\u4e3a\u7535\u5de5\u64cd\u4f5c\u7559\u51fa\u4e86\u5408\u7406\u3001\u5b89\u5168\u7684\u7a7a\u95f4\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Clearance_Operation_Requirements\"><\/span>\u5b89\u5168\u8bb8\u53ef\u64cd\u4f5c\u8981\u6c42<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u7535\u6c14\u7bb1\u524d\u65b9\u7684\u6700\u5c0f\u5de5\u4f5c\u7a7a\u95f4\u6df1\u5ea6\u4e3a 36 \u82f1\u5bf8\u3002\u8fdb\u884c\u68c0\u67e5\u548c\u4f7f\u7528\u64cd\u4f5c\u5de5\u5177\u7684\u6df1\u5ea6\u7a7a\u95f4\u4e3a 30 \u82f1\u5bf8\u3002\u51fa\u4e8e\u5b89\u5168\u548c\u7ef4\u62a4\u7684\u8003\u8651\uff0c\u300a\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303\u300b(NEC) \u89c4\u5b9a\uff0c\u5fc5\u987b\u4fdd\u6301\u81f3\u5c11 6 \u82f1\u5c3a\u7684\u6700\u5c0f\u51c0\u7a7a\u9ad8\u5ea6\uff0c\u8be5\u9ad8\u5ea6\u6839\u636e\u6240\u5b89\u88c5\u8bbe\u5907\u7684\u7535\u538b\u786e\u5b9a\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Accessibility_Rules\"><\/span>\u65e0\u969c\u788d\u89c4\u5219<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8bbe\u5907\u8231\u95e8\u5fc5\u987b\u81f3\u5c11\u80fd\u6253\u5f00 90 \u5ea6\uff0c\u4ee5\u4fbf\u4e8e\u68c0\u4fee\u7ec4\u4ef6\u548c\u7535\u8def\u3002\u5de5\u4f5c\u533a\u57df\u5fc5\u987b\u4fdd\u6301\u6e05\u6d01\uff0c\u901a\u9053\u5185\u4e0d\u5f97\u6709\u4efb\u4f55\u969c\u788d\u7269\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Avoid_Common_NEC_Violations\"><\/span>\u5982\u4f55\u907f\u514d\u5e38\u89c1\u7684NEC\u8fdd\u89c4\u884c\u4e3a<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=\"\u63a5\u7ebf\u76d2\" 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>\u63a5\u7ebf\u76d2\u8fc7\u8f7d<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u63a5\u7ebf\u76d2\u5185\u7535\u7ebf\u3001\u8fde\u63a5\u5668\u548c\u8bbe\u5907\u8fc7\u591a\uff0c\u8d85\u8fc7\u4e86\u63a5\u7ebf\u76d2\u7684\u6807\u79f0\u5bb9\u79ef\u3002\u8fd9\u53ef\u80fd\u5bfc\u81f4\u8bbe\u5907\u8fc7\u70ed\uff0c\u9020\u6210\u7edd\u7f18\u5c42\u8001\u5316\u7194\u5316\uff0c\u751a\u81f3\u5f15\u53d1\u77ed\u8def\u6216\u706b\u707e\u3002\u56e0\u6b64\uff0c\u5fc5\u987b\u6839\u636e\u7535\u7ebf\u6570\u91cf\u8ba1\u7b97\u6240\u9700\u7684\u63a5\u7ebf\u76d2\u5bb9\u79ef\u3002\u5982\u679c\u4e0d\u786e\u5b9a\uff0c\u53ef\u4ee5\u9009\u62e9\u5bb9\u91cf\u66f4\u5927\u7684\u63a5\u7ebf\u76d2\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Improper_Equipment_Wiring\"><\/span>\u8bbe\u5907\u63a5\u7ebf\u4e0d\u5f53<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u91d1\u5c5e\u76d2\u6216\u7ba1\u69fd\u7684\u8bbe\u5907\u63a5\u5730\u7ebf\u672a\u8fde\u63a5\uff0c\u6216\u8005\u53ea\u662f\u7f20\u7ed5\u5728\u63a5\u5730\u87ba\u9489\u4e0a\u800c\u672a\u4f7f\u7528\u6b63\u786e\u7684\u7aef\u5b50\u3002\u957f\u671f\u5e26\u7535\u7684\u91d1\u5c5e\u5916\u58f3\u5728\u53d1\u751f\u63a5\u5730\u6545\u969c\u65f6\u53ef\u80fd\u9020\u6210\u4e25\u91cd\u7684\u89e6\u7535\u5371\u9669\u3002\u60a8\u5e94\u8be5\u4f7f\u7528\u6b63\u786e\u7684\u63a5\u7ebf\u7aef\u5b50\u3001\u5939\u5b50\u6216\u87ba\u9489\uff0c\u4ee5\u786e\u4fdd\u7262\u56fa\u7684\u91d1\u5c5e\u63a5\u89e6\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Using_the_Incorrect_Type_of_Junction_Box\"><\/span>\u4f7f\u7528\u9519\u8bef\u7684\u63a5\u7ebf\u76d2\u7c7b\u578b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u4f8b\u5982\uff0c\u5728\u6f6e\u6e7f\u73af\u5883\u4e2d\uff0c\u5e94\u4f7f\u7528\u901a\u5e38\u7528\u4e8e\u5e72\u71e5\u573a\u6240\u7684\u63a5\u7ebf\u76d2\u3002\u4e0d\u5408\u9002\u7684\u63a5\u7ebf\u76d2\u4f1a\u8ba9\u7070\u5c18\u548c\u6e7f\u6c14\u8fdb\u5165\u5185\u90e8\u3002\u6e7f\u6c14\u53ef\u80fd\u5bfc\u81f4\u8150\u8680\u3001\u77ed\u8def\u548c\u89e6\u7535\u5371\u9669\u3002\u8fde\u63a5\u9644\u4ef6\u65f6\uff0c\u5e94\u59cb\u7ec8\u4f7f\u7528\u7b26\u5408\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u6807\u51c6\u7684\u4e13\u7528\u63a5\u7ebf\u76d2\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Excessive_Filling_of_Conduit_or_Cable_Trays\"><\/span>\u5bfc\u7ba1\u6216\u7535\u7f06\u6865\u67b6\u586b\u5145\u8fc7\u91cf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5982\u679c\u63d2\u5165\u5bfc\u7ba1\u5185\u7684\u7535\u7ebf\u6a2a\u622a\u9762\u79ef\u8d85\u8fc7\u5176\u6700\u5927\u5141\u8bb8\u586b\u5145\u7387\uff0c\u4f1a\u5bfc\u81f4\u6563\u70ed\u4e0d\u826f\u3001\u7535\u7ebf\u8fc7\u70ed\uff0c\u5e76\u53ef\u80fd\u635f\u574f\u7edd\u7f18\u5c42\u3002\u56e0\u6b64\uff0c\u8ba1\u7b97\u5408\u9002\u7684\u5bfc\u7ba1\u586b\u5145\u7387\u6216\u9009\u62e9\u66f4\u5927\u5c3a\u5bf8\u7684\u5bfc\u7ba1\u53ef\u4ee5\u6539\u5584\u6563\u70ed\uff0c\u5e76\u4e3a\u672a\u6765\u7684\u7ebf\u8def\u6269\u5c55\u9884\u7559\u8db3\u591f\u7684\u7a7a\u95f4\u3002.<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=\"\u63a5\u7ebf\u76d2\uff082\uff09\" 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>\u5e38\u95ee\u95ee\u9898<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>NEMA \u548c NEC \u5bf9\u5916\u58f3\u7684\u8981\u6c42\u6709\u4ec0\u4e48\u533a\u522b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/www.kdmsteel.com\/zh\/\u7ebf\u7c92\u4f53\u5916\u58f3\/\">\u7f8e\u56fd\u7535\u6c14\u5236\u9020\u5546\u534f\u4f1a<\/a>\u00a0NEMA\u662f\u4e00\u4e2a\u884c\u4e1a\u6807\u51c6\u7ec4\u7ec7\uff0c\u4e3b\u8981\u5b9a\u4e49\u5916\u58f3\u7684\u4ea7\u54c1\u6027\u80fd\u6807\u51c6\uff0c\u7528\u4e8e\u5bf9\u7535\u6c14\u5916\u58f3\u7684\u7269\u7406\u7279\u6027\u8fdb\u884c\u5206\u7c7b\uff0c\u4f8b\u5982\u9632\u5c18\u3001\u9632\u6c34\u548c\u8010\u8150\u8680\u7b49\u3002NEC\u662f\u4e00\u9879\u76d1\u7ba1\u5b89\u5168\u5b89\u88c5\u89c4\u8303\uff0c\u5f3a\u5236\u8981\u6c42\u5728\u7279\u5b9a\u5b89\u88c5\u4e2d\u4f7f\u7528\u7b26\u5408\u76f8\u5e94NEMA\u7b49\u7ea7\u7684\u5916\u58f3\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_to_Choose_a_Junction_Box_of_the_Appropriate_Volume\"><\/span>\u5982\u4f55\u9009\u62e9\u5408\u9002\u5bb9\u91cf\u7684\u63a5\u7ebf\u76d2\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6839\u636eNEC 314.16\u7684\u89c4\u5b9a\uff0c\u60a8\u9700\u8981\u6e05\u70b9\u63a5\u7ebf\u76d2\u5185\u7684\u6240\u6709\u5143\u4ef6\uff0c\u5e76\u6839\u636eNEC\u89c4\u8303\u8ba1\u7b97\u5b83\u4eec\u6240\u5360\u7528\u7684\u7535\u7ebf\u6570\u91cf\u3002\u7136\u540e\uff0c\u6839\u636e\u7535\u7ebf\u7684\u6700\u5927\u89c4\u683c\uff0c\u786e\u5b9a\u5355\u4f4d\u7535\u7ebf\u6570\u91cf\u7684\u4f53\u79ef\u3002\u63a5\u7ebf\u76d2\u7684\u4f53\u79ef\u6700\u597d\u5927\u4e8e\u6240\u9700\u4f53\u79ef\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Is_the_Covering_Junction_Box_Safe_and_Complies_with_NEC_Regulations\"><\/span>\u8be5\u63a5\u7ebf\u76d2\u76d6\u662f\u5426\u5b89\u5168\u5e76\u7b26\u5408NEC\u89c4\u8303\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u662f\u7684\uff0c\u5e26\u76d6\u63a5\u7ebf\u76d2\u4e0d\u4ec5\u5b89\u5168\uff0c\u800c\u4e14\u662fNEC\u89c4\u8303\u7684\u5f3a\u5236\u6027\u8981\u6c42\u3002\u6240\u6709\u63a5\u7ebf\u76d2\u90fd\u5fc5\u987b\u914d\u5907\u5b8c\u6574\u7684\u76d6\u5b50\uff0c\u4ee5\u9632\u6b62\u89e6\u7535\u3001\u9632\u6b62\u7070\u5c18\u548c\u6e7f\u6c14\u8fdb\u5165\uff0c\u5e76\u786e\u4fdd\u7535\u6c14\u5916\u58f3\u7cfb\u7edf\u7684\u5b8c\u6574\u6027\u3002.<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u60a8\u9009\u62e9\u7684\u76d6\u677f\u5fc5\u987b\u4e0e\u63a5\u7ebf\u76d2\u7684\u7c7b\u578b\u76f8\u5339\u914d\uff0c\u5e76\u4e14\u9002\u5408\u5b89\u88c5\u73af\u5883\u3002\u76d6\u677f\u5fc5\u987b\u7262\u56fa\u5b89\u88c5\uff0c\u4ee5\u786e\u4fdd\u5b89\u5168\u5730\u906e\u76d6\u63a5\u7ebf\u76d2\u5f00\u53e3\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_Consequences_can_be_Caused_by_Incorrect_Grounding_of_the_Junction_Box\"><\/span>\u63a5\u7ebf\u76d2\u63a5\u5730\u9519\u8bef\u4f1a\u9020\u6210\u54ea\u4e9b\u540e\u679c\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u7535\u7ebf\u8fc7\u70ed\u53ef\u80fd\u5bfc\u81f4\u81f4\u547d\u7684\u89e6\u7535\u6216\u706b\u707e\u3002\u6545\u969c\u7535\u538b\u65e0\u6cd5\u8fd4\u56de\u7535\u6e90\u53ef\u80fd\u5bfc\u81f4\u8bbe\u5907\u635f\u574f\u3002\u66f4\u91cd\u8981\u7684\u662f\uff0c\u672a\u7ecf\u6279\u51c6\u7684\u5b89\u88c5\u65e0\u6cd5\u901a\u8fc7\u7535\u6c14\u68c0\u67e5\uff0c\u5e76\u53ef\u80fd\u5bfc\u81f4\u7f5a\u6b3e\u751a\u81f3\u6cd5\u5f8b\u8d23\u4efb\u3002.<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=\"\u9632\u98ce\u96e8\u63a5\u7ebf\u76d2\" 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>\u6700\u540e\u60f3\u8bf4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u5b89\u5168\u7684\u7535\u6c14\u5b89\u88c5\u4e0d\u4ec5\u9700\u8981\u9075\u5faa\u7f8e\u56fd\u56fd\u5bb6\u7535\u6c14\u89c4\u8303 (NEC) \u6807\u51c6\uff0c\u8fd8\u9700\u8981\u4f7f\u7528\u7b26\u5408\u5404\u79cd\u5e94\u7528\u573a\u666f\u89c4\u8303\u7684\u63a5\u7ebf\u76d2\u3002. <a href=\"https:\/\/www.kdmsteel.com\/zh\/\">\u5361\u5fb7\u59c6<\/a>\u00a0\u662f\u4e00\u5bb6\u4e13\u4e1a\u7684\u5b9a\u5236\u7535\u6c14\u5916\u58f3\u5236\u9020\u5546\u3002\u6211\u4eec\u53ef\u5b9a\u5236\u751f\u4ea7\u4eceNEMA 1\u5230NEMA 13\u7684\u5404\u79cd\u7535\u6c14\u5916\u58f3\uff0c\u5168\u9762\u6ee1\u8db3\u60a8\u7684\u5b9a\u5236\u9700\u6c42\u3002\u5feb\u901f\u54cd\u5e94\u548c\u5168\u9762\u7684\u5b9a\u5236\u670d\u52a1\u662f\u6211\u4eec\u5b9a\u5236\u751f\u4ea7\u9886\u57df\u7684\u72ec\u7279\u4f18\u52bf\u3002\u6b22\u8fce\u5782\u8be2\uff0c\u6211\u4eec\u5c06\u4e3a\u60a8\u63d0\u4f9b\u4e2a\u6027\u5316\u7684\u89e3\u51b3\u65b9\u6848\u3002.<\/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\/zh\/\u63a5\u7ebf\u76d2-nec-\u89c4\u8303\u6807\u51c6\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\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. 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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. 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