{"id":50423,"date":"2026-03-27T13:05:25","date_gmt":"2026-03-27T13:05:25","guid":{"rendered":"https:\/\/www.kdmsteel.com\/?p=50423"},"modified":"2026-03-27T14:40:26","modified_gmt":"2026-03-27T14:40:26","slug":"junction-box-in-attic","status":"publish","type":"post","link":"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/","title":{"rendered":"\u5c4b\u6839\u88cf\u306e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\uff1a\u77e5\u3063\u3066\u304a\u304f\u3079\u304d\u3053\u3068\u3059\u3079\u3066"},"content":{"rendered":"<p>\u5c4b\u6839\u88cf\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306e\u9069\u5207\u306a\u9078\u5b9a\u3068\u8a2d\u7f6e\u306f\u3001\u914d\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5168\u6027\u3068\u4fe1\u983c\u6027\u306b\u76f4\u63a5\u5f71\u97ff\u3057\u307e\u3059\u3002\u3053\u306e\u8a18\u4e8b\u306f\u3001\u96fb\u6c17\u6280\u8853\u8005\u3084\u30b7\u30b9\u30c6\u30e0\u30a4\u30f3\u30c6\u30b0\u30ec\u30fc\u30bf\u30fc\u304c\u5c4b\u6839\u88cf\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306e\u7a2e\u985e\u3001\u6b63\u3057\u3044\u8a2d\u7f6e\u65b9\u6cd5\u3001\u304a\u3088\u3073\u95a2\u9023\u898f\u683c\u3092\u7406\u89e3\u3057\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306b\u304a\u3044\u3066\u3088\u308a\u826f\u3044\u610f\u601d\u6c7a\u5b9a\u3092\u884c\u3046\u306e\u306b\u5f79\u7acb\u3061\u307e\u3059\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\u6b21<\/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=\"\u76ee\u6b21\u3092\u5207\u308a\u66ff\u3048\u308b\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u30c8\u30b0\u30eb<\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#What_Is_a_Junction_Box\" >\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3068\u306f\u4f55\u3067\u3059\u304b\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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Types_of_Attic_Junction_Box\" >\u5c4b\u6839\u88cf\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306e\u7a2e\u985e<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#By_Material\" >\u7d20\u6750\u5225:<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Plastic_Junction_Box\" >\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u88fd\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Metal_Junction_Box\" >\u91d1\u5c5e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9<\/a><\/li><\/ul><\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#By_Protection_Level\" >\u4fdd\u8b77\u30ec\u30d9\u30eb\u5225\uff1a<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Standard_SquareOctagonal_Boxes\" >\u6a19\u6e96\u7684\u306a\u6b63\u65b9\u5f62\uff0f\u516b\u89d2\u5f62\u306e\u7bb1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Weatherproof_Junction_Boxes\" >\u8010\u5019\u6027\u63a5\u7d9a\u7bb1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#By_Application\" >\u7533\u8acb\u65b9\u6cd5\uff1a<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Ceiling-Mounted_Boxes\" >\u5929\u4e95\u53d6\u308a\u4ed8\u3051\u578b\u30dc\u30c3\u30af\u30b9<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Fan-Rated_Junction_Boxes\" >\u30d5\u30a1\u30f3\u5b9a\u683c\u63a5\u7d9a\u7bb1<\/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-12\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#How_to_Install_a_Junction_Box_in_the_Attic\" >\u5c4b\u6839\u88cf\u306b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3059\u308b\u65b9\u6cd5<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Preparation_for_Installation_Kits\" >\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30ad\u30c3\u30c8\u306e\u6e96\u5099<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Choose_the_Proper_Location\" >\u9069\u5207\u306a\u5834\u6240\u3092\u9078\u629e\u3059\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Mount_the_Junction_Box_Securely\" >\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u3057\u3063\u304b\u308a\u3068\u56fa\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044<\/a><\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Route_and_Secure_Wires\" >\u914d\u7dda\u3092\u6574\u7406\u3057\u3066\u56fa\u5b9a\u3059\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Make_Electrical_Connections\" >\u96fb\u6c17\u63a5\u7d9a\u3092\u884c\u3046<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Install_Junction_Box_Cover\" >\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u30ab\u30d0\u30fc\u3092\u53d6\u308a\u4ed8\u3051\u308b<\/a><\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Final_Inspection_and_Restoration\" >\u6700\u7d42\u691c\u67fb\u3068\u4fee\u5fa9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Code_Requirements_for_Junction_Boxes_in_Attics\" >\u5c4b\u6839\u88cf\u90e8\u5c4b\u306b\u304a\u3051\u308b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306e\u898f\u5b9a\u8981\u4ef6<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.kdmsteel.com\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Cost_of_Junction_Box_Installation_in_Attic\" >\u5c4b\u6839\u88cf\u3078\u306e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u8a2d\u7f6e\u8cbb\u7528<\/a><\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#FAQs\" >\u3088\u304f\u3042\u308b\u8cea\u554f<\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Can_a_Junction_Box_Be_Covered_with_Attic_Insulation\" >\u63a5\u7d9a\u7bb1\u3092\u5c4b\u6839\u88cf\u65ad\u71b1\u6750\u3067\u8986\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304b\uff1f<\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Can_Old_Attic_Junction_Boxes_Be_Reused_During_Upgrades\" >\u53e4\u3044\u5c4b\u6839\u88cf\u306e\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306f\u3001\u6539\u4fee\u5de5\u4e8b\u306e\u969b\u306b\u518d\u5229\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#How_Does_Humidity_Affect_Attic_Junction_Boxes\" >\u6e7f\u5ea6\u306f\u5c4b\u6839\u88cf\u306e\u63a5\u7d9a\u7bb1\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u306e\u304b\uff1f<\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#How_Do_You_Locate_a_Hidden_Junction_Box_in_an_Attic\" >\u5c4b\u6839\u88cf\u306b\u96a0\u3055\u308c\u305f\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<\/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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/#Final_Thought\" >\u6700\u5f8c\u306b<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Junction_Box\"><\/span>\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3068\u306f\u4f55\u3067\u3059\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50446\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Junction-Box.jpg\" alt=\"\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3068\u306f\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Junction-Box.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Junction-Box-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Junction-Box-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/What-Is-a-Junction-Box-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u3042 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u30a8\u30f3\u30af\u30ed\u30fc\u30b8\u30e3\/\">\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9<\/a> \u96fb\u6c17\u914d\u7dda\u30dc\u30c3\u30af\u30b9\u306f\u3001\u56de\u8def\u5185\u306e\u914d\u7dda\u63a5\u7d9a\u90e8\u3092\u53ce\u5bb9\u3001\u4fdd\u8b77\u3001\u6574\u7406\u3059\u308b\u305f\u3081\u306b\u4f7f\u7528\u3055\u308c\u308b\u96fb\u6c17\u6a5f\u5668\u7528\u7b50\u4f53\u3067\u3059\u3002\u8907\u6570\u306e\u5c0e\u4f53\u3092\u63a5\u7d9a\u3059\u308b\u305f\u3081\u306e\u5b89\u5168\u306a\u63a5\u7d9a\u70b9\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001\u63a5\u7d9a\u90e8\u3092\u6a5f\u68b0\u7684\u640d\u50b7\u3001\u57c3\u3001\u6e7f\u6c17\u3001\u5076\u767a\u7684\u306a\u63a5\u89e6\u304b\u3089\u4fdd\u8b77\u3057\u307e\u3059\u3002.<\/p>\n<p>\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306f\u901a\u5e38\u3001\u91d1\u5c5e\u3068\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u3067\u3067\u304d\u3066\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u3001\u5b89\u5168\u306a\u914d\u7dda\u306e\u5ef6\u9577\u3084\u5206\u914d\u304c\u5fc5\u8981\u306a\u5c4b\u6839\u88cf\u90e8\u5c4b\u3078\u306e\u8a2d\u7f6e\u306a\u3069\u3001\u5546\u696d\u65bd\u8a2d\u3084\u7523\u696d\u65bd\u8a2d\u306e\u96fb\u6c17\u30b7\u30b9\u30c6\u30e0\u3067\u5e83\u304f\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Types_of_Attic_Junction_Box\"><\/span>\u5c4b\u6839\u88cf\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306e\u7a2e\u985e<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50447\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Types-of-Attic-Junction-Box.jpg\" alt=\"\u5c4b\u6839\u88cf\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306e\u7a2e\u985e\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Types-of-Attic-Junction-Box.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Types-of-Attic-Junction-Box-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Types-of-Attic-Junction-Box-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Types-of-Attic-Junction-Box-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u5c4b\u6839\u88cf\u306b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3059\u308b\u3053\u3068\u306f\u3001\u96fb\u6c17\u56de\u8def\u306e\u62e1\u5f35\u3084\u5909\u66f4\u3092\u884c\u3046\u969b\u306b\u3088\u304f\u884c\u308f\u308c\u308b\u65b9\u6cd5\u3067\u3059\u3002\u9069\u5207\u306a\u5c4b\u6839\u88cf\u7528\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306e\u9078\u629e\u306f\u3001\u4e3b\u306b\u6750\u8cea\u3001\u69cb\u9020\u3001\u4fdd\u8b77\u30ec\u30d9\u30eb\u3001\u304a\u3088\u3073\u7528\u9014\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u3001\u5c4b\u6839\u88cf\u7528\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306e\u7a2e\u985e\u306b\u3064\u3044\u3066\u8a73\u3057\u304f\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"By_Material\"><\/span>\u7d20\u6750\u5225:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Plastic_Junction_Box\"><\/span>\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u88fd\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u3053\u306e\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u88fd\u306e\u63a5\u7d9a\u7bb1\u306f\u8efd\u91cf\u3067\u8010\u8150\u98df\u6027\u306b\u512a\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u5c4b\u6839\u88cf\u90e8\u5c4b\u3078\u306e\u8a2d\u7f6e\u306b\u6700\u9069\u3067\u3059\u3002.<\/p>\n<p>\u7279\u7b46\u3059\u3079\u304d\u5229\u70b9\u3068\u3057\u3066\u306f\u3001\u975e\u5c0e\u96fb\u6027\u3067\u3042\u308a\u3001\u91d1\u5c5e\u90e8\u54c1\u304c\u9732\u51fa\u3057\u3066\u3044\u306a\u3044\u9650\u308a\u63a5\u5730\u304c\u4e0d\u8981\u3067\u3042\u308b\u3053\u3068\u3001\u9632\u9306\u6027\u30fb\u9632\u6e7f\u6027\u306b\u512a\u308c\u3001\u8a2d\u7f6e\u304c\u5bb9\u6613\u3067\u30b3\u30b9\u30c8\u52b9\u7387\u304c\u9ad8\u304f\u3001\u4e7e\u71e5\u74b0\u5883\u306b\u304a\u3051\u308b\u975e\u91d1\u5c5e\uff08NM\uff09\u30b1\u30fc\u30d6\u30eb\u306b\u9069\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u6319\u3052\u3089\u308c\u308b\u3002.<\/p>\n<p>\u3057\u304b\u3057\u3001\u91d1\u5c5e\u88fd\u306e\u63a5\u7d9a\u7bb1\u3068\u6bd4\u8f03\u3059\u308b\u3068\u8010\u71b1\u6027\u304c\u4f4e\u304f\u3001\u9ad8\u8ca0\u8377\u7528\u9014\u3084\u5546\u696d\u7528\u9014\u306b\u306f\u9069\u3057\u3066\u3044\u307e\u305b\u3093\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Metal_Junction_Box\"><\/span>\u91d1\u5c5e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8010\u4e45\u6027\u3068\u8010\u706b\u6027\u3092\u517c\u306d\u5099\u3048\u305f\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u304c\u5fc5\u8981\u306a\u5834\u5408\u306f\u3001 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u91d1\u5c5e\u88fd\u63a5\u7d9a\u7bb1\/\">\u91d1\u5c5e\u88fd\u63a5\u7d9a\u7bb1<\/a> \u304c\u7b2c\u4e00\u306e\u9078\u629e\u80a2\u3067\u3059\u3002\u512a\u308c\u305f\u5f37\u5ea6\u3068\u8010\u885d\u6483\u6027\u3092\u6301\u3061\u3001\u8010\u71b1\u6027\u306b\u3082\u512a\u308c\u3066\u3044\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u91d1\u5c5e\u914d\u7ba1\u30b7\u30b9\u30c6\u30e0\u3067\u306f\u3001\u63a5\u5730\u9023\u7d9a\u6027\u3092\u7dad\u6301\u3059\u308b\u305f\u3081\u306b\u91d1\u5c5e\u88fd\u306e\u63a5\u7d9a\u7bb1\u304c\u5fc5\u8981\u3068\u306a\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p>\u91d1\u5c5e\u88fd\u306e\u63a5\u7d9a\u7bb1\u306f\u3001\u4f7f\u7528\u3059\u308b\u969b\u306b\u9069\u5207\u306b\u63a5\u5730\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u8a2d\u7f6e\u624b\u9806\u306f\u3088\u308a\u8907\u96d1\u3067\u3001\u5546\u696d\u65bd\u8a2d\u3001\u5de5\u696d\u65bd\u8a2d\u3001\u307e\u305f\u306f\u9ad8\u8ca0\u8377\u306e\u5c4b\u6839\u88cf\u90e8\u5c4b\u3078\u306e\u8a2d\u7f6e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"By_Protection_Level\"><\/span>\u4fdd\u8b77\u30ec\u30d9\u30eb\u5225\uff1a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Standard_SquareOctagonal_Boxes\"><\/span>\u6a19\u6e96\u7684\u306a\u6b63\u65b9\u5f62\uff0f\u516b\u89d2\u5f62\u306e\u7bb1<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u6a19\u6e96\u7684\u306a\u6b63\u65b9\u5f62\uff0f\u516b\u89d2\u5f62\u306e\u63a5\u7d9a\u7bb1\u306f\u3001\u4e00\u822c\u7684\u306a\u914d\u7dda\u3084\u7167\u660e\u5668\u5177\u306e\u63a5\u7d9a\u306b\u3088\u304f\u7528\u3044\u3089\u308c\u308b\u5f62\u72b6\u3067\u3059\u3002\u6b63\u65b9\u5f62\u306e\u7bb1\u306f\u4e3b\u306b4\u30a4\u30f3\u30c1\uff08\u7d0410cm\uff09\u306e\u30b5\u30a4\u30ba\u3067\u3001\u5185\u90e8\u7a7a\u9593\u304c\u5e83\u304f\u3001\u8907\u6570\u306e\u914d\u7dda\u63a5\u7d9a\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002\u516b\u89d2\u5f62\u306e\u63a5\u7d9a\u7bb1\u306f\u3001\u7167\u660e\u5668\u5177\u306b\u3088\u304f\u7528\u3044\u3089\u308c\u3001\u5929\u4e95\u7167\u660e\u3084\u5c4b\u6839\u88cf\u7167\u660e\u56de\u8def\u306a\u3069\u3067\u3088\u304f\u898b\u3089\u308c\u307e\u3059\u3002\u3069\u3061\u3089\u306e\u30bf\u30a4\u30d7\u306e\u63a5\u7d9a\u7bb1\u3082\u3001\u91d1\u5c5e\u88fd\u3068\u30d7\u30e9\u30b9\u30c1\u30c3\u30af\u88fd\u306e\u3082\u306e\u304c\u3042\u308a\u3001\u304a\u597d\u307f\u306b\u5408\u308f\u305b\u3066\u304a\u9078\u3073\u3044\u305f\u3060\u3051\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Weatherproof_Junction_Boxes\"><\/span>\u8010\u5019\u6027\u63a5\u7d9a\u7bb1<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u8010\u5019\u6027\u307e\u305f\u306f\u5bc6\u9589\u578b\u306e\u63a5\u7d9a\u7bb1\u306f\u901a\u5e38\u3001\u30ac\u30b9\u30b1\u30c3\u30c8\u3068\u5bc6\u9589\u6027\u306e\u9ad8\u3044\u30b7\u30fc\u30eb\u3092\u5099\u3048\u3066\u3044\u308b\u305f\u3081\u3001\u904e\u9177\u306a\u5c4b\u6839\u88cf\u74b0\u5883\u3067\u306e\u4f7f\u7528\u306b\u6700\u9069\u3067\u3059\u3002.<\/p>\n<p>\u5c4b\u6839\u88cf\u306e\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u8010\u5019\u6027\u306e\u3042\u308b\u56f2\u3044\u306a\u3069\u00a0 <a href=\"https:\/\/www.kdmsteel.com\/ja\/nema-3r\u63a5\u7d9a\u7bb1\/\">\u30cd\u30de3R<\/a>, \u6e7f\u6c17\u3084\u7c89\u5875\u304b\u3089\u4fdd\u8b77\u3059\u308b\u305f\u3081\u306b\u306f\u3001IP65\u3001IP66\u306e\u4fdd\u8b77\u7b49\u7d1a\u304c\u5fc5\u8981\u3068\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089\u306e\u63a5\u7d9a\u7bb1\u306f\u7d50\u9732\u9632\u6b62\u6a5f\u80fd\u3082\u5099\u3048\u3066\u304a\u308a\u3001\u8010\u4e45\u6027\u306b\u3082\u512a\u308c\u3066\u3044\u307e\u3059\u3002.<\/p>\n<p>\u3057\u304b\u3057\u3001\u3053\u308c\u306f\u591a\u304f\u306e\u5834\u5408\u3001\u30b3\u30b9\u30c8\u5897\u306b\u3064\u306a\u304c\u308a\u3001\u9069\u5207\u306a\u5bc6\u9589\u306e\u305f\u3081\u306b\u30b1\u30fc\u30d6\u30eb\u30b0\u30e9\u30f3\u30c9\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u751f\u3058\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"By_Application\"><\/span>\u7533\u8acb\u65b9\u6cd5\uff1a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<h4><span class=\"ez-toc-section\" id=\"Ceiling-Mounted_Boxes\"><\/span>\u5929\u4e95\u53d6\u308a\u4ed8\u3051\u578b\u30dc\u30c3\u30af\u30b9<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u5929\u4e95\u53d6\u308a\u4ed8\u3051\u578b\u30dc\u30c3\u30af\u30b9\u306f\u3001\u6881\u307e\u305f\u306f\u69cb\u9020\u90e8\u6750\u306b\u76f4\u63a5\u53d6\u308a\u4ed8\u3051\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30dc\u30c3\u30af\u30b9\u306f\u65ad\u71b1\u6750\u306e\u4e0a\u306b\u3001\u76ee\u306b\u898b\u3048\u308b\u5f62\u3067\u53d6\u308a\u5916\u3057\u53ef\u80fd\u306a\u72b6\u614b\u3067\u8a2d\u7f6e\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u8a2d\u7f6e\u306f\u5b89\u5168\u3067\u3001\u95a2\u9023\u898f\u683c\u306b\u6e96\u62e0\u3057\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u8a2d\u7f6e\u65b9\u6cd5\u306b\u3088\u308a\u3001\u96fb\u7dda\u3078\u306e\u6a5f\u68b0\u7684\u30b9\u30c8\u30ec\u30b9\u306e\u30ea\u30b9\u30af\u3082\u8efd\u6e1b\u3055\u308c\u307e\u3059\u3002.<\/p>\n<p>\u8a2d\u7f6e\u4f5c\u696d\u4e2d\u306f\u3001\u6b63\u3057\u3044\u4f4d\u7f6e\u306b\u914d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u5b89\u5b9a\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u3001\u6a19\u6e96\u7684\u306a\u5c4b\u6839\u88cf\u306e\u30d0\u30ea\u30a2\u30d5\u30ea\u30fc\u30dc\u30c3\u30af\u30b9\u8a2d\u7f6e\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h4><span class=\"ez-toc-section\" id=\"Fan-Rated_Junction_Boxes\"><\/span>\u30d5\u30a1\u30f3\u5b9a\u683c\u63a5\u7d9a\u7bb1<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u30d5\u30a1\u30f3\u5b9a\u683c\u306e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306f\u3001\u30b7\u30fc\u30ea\u30f3\u30b0\u30d5\u30a1\u30f3\u306a\u3069\u306e\u52d5\u8377\u91cd\u3092\u30b5\u30dd\u30fc\u30c8\u3057\u307e\u3059\u3002\u632f\u52d5\u3084\u91cd\u91cf\u306b\u5bfe\u5fdc\u3067\u304d\u308b\u3088\u3046\u5f37\u5316\u3055\u308c\u305f\u69cb\u9020\u3067\u3001\u3088\u308a\u91cd\u3044\u5668\u5177\u3092\u652f\u3048\u308b\u5b9a\u683c\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u8a2d\u7f6e\u6642\u306b\u306f\u3001\u591a\u304f\u306e\u5834\u5408\u3001 <a href=\"https:\/\/www.kdmsteel.com\/ja\/\u53d6\u308a\u4ed8\u3051\u30d6\u30e9\u30b1\u30c3\u30c8\/\">\u62ec\u5f27<\/a> \u305d\u3057\u3066\u3001\u6b6f\u5217\u77ef\u6b63\u5668\u5177\u3002.<\/p>\n<p>\u30d5\u30a1\u30f3\u5bfe\u5fdc\u306e\u63a5\u7d9a\u7bb1\u306f\u3001\u6a19\u6e96\u7684\u306a\u63a5\u7d9a\u7bb1\u3088\u308a\u3082\u9ad8\u4fa1\u3067\u3059\u3002\u5358\u7d14\u306a\u914d\u7dda\u306e\u307f\u306b\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u9069\u3057\u3066\u3044\u307e\u305b\u3093\u3002\u53ef\u52d5\u90e8\u3084\u91cd\u91cf\u306e\u3042\u308b\u6a5f\u5668\u306a\u3069\u3001\u8ca0\u8377\u306e\u304b\u304b\u308b\u7528\u9014\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Install_a_Junction_Box_in_the_Attic\"><\/span>\u5c4b\u6839\u88cf\u306b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3059\u308b\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50448\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/How-to-Install-a-Junction-Box-in-the-Attic.jpg\" alt=\"\u5c4b\u6839\u88cf\u306b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u8a2d\u7f6e\u3059\u308b\u65b9\u6cd5\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/How-to-Install-a-Junction-Box-in-the-Attic.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/How-to-Install-a-Junction-Box-in-the-Attic-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/How-to-Install-a-Junction-Box-in-the-Attic-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/How-to-Install-a-Junction-Box-in-the-Attic-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Preparation_for_Installation_Kits\"><\/span>\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u30ad\u30c3\u30c8\u306e\u6e96\u5099<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u8a2d\u7f6e\u4f5c\u696d\u3092\u958b\u59cb\u3059\u308b\u524d\u306b\u3001\u5bfe\u8c61\u56de\u8def\u306e\u96fb\u6e90\u3092\u5207\u308a\u3001\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3001\u30ef\u30a4\u30e4\u30b3\u30cd\u30af\u30bf\u3001\u30b1\u30fc\u30d6\u30eb\u30af\u30e9\u30f3\u30d7\u3001\u96fb\u52d5\u30c9\u30ea\u30eb\u3001\u77f3\u818f\u30dc\u30fc\u30c9\u7528\u30ce\u30b3\u30ae\u30ea\u3001\u30c9\u30e9\u30a4\u30d0\u30fc\u306a\u3069\u3001\u5fc5\u8981\u306a\u5de5\u5177\u3068\u6750\u6599\u3092\u6e96\u5099\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p>\u3055\u3089\u306b\u3001\u4e0a\u8a18\u306e\u7a2e\u985e\u306b\u57fa\u3065\u3044\u3066\u9069\u5207\u306a\u30bf\u30a4\u30d7\u306e\u63a5\u7d9a\u7bb1\u3092\u9078\u629e\u3067\u304d\u307e\u3059\u3002\u540c\u6642\u306b\u3001\u63a5\u7d9a\u7bb1\u306e\u30b5\u30a4\u30ba\u304c\u9069\u5207\u3067\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b5\u30a4\u30ba\u306f\u3001\u63a5\u7d9a\u7bb1\u306b\u53ce\u5bb9\u3067\u304d\u308b\u96fb\u7dda\u306e\u672c\u6570\u306b\u95a2\u4fc2\u3057\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Choose_the_Proper_Location\"><\/span>\u9069\u5207\u306a\u5834\u6240\u3092\u9078\u629e\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306f\u3001\u4fee\u7406\u3057\u3084\u3059\u3044\u5834\u6240\u306b\u8a2d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u822c\u7684\u306b\u306f\u3001\u9811\u4e08\u306a\u69cb\u9020\u90e8\u6750\u306b\u53d6\u308a\u4ed8\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u3001\u30b9\u30bf\u30c3\u30c9\u30d5\u30a1\u30a4\u30f3\u30c0\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3068\u4f4d\u7f6e\u6c7a\u3081\u304c\u5bb9\u6613\u306b\u306a\u308a\u307e\u3059\u3002.<\/p>\n<p>\u8a2d\u7f6e\u5834\u6240\u304c\u69cb\u9020\u90e8\u6750\u3092\u76f4\u63a5\u8a2d\u7f6e\u3067\u304d\u308b\u5834\u6240\u3067\u306a\u3044\u5834\u5408\u306f\u3001\u9069\u5207\u306a\u53d6\u308a\u4ed8\u3051\u91d1\u5177\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002\u63a5\u7d9a\u7bb1\u304c\u65ad\u71b1\u6750\u306e\u4e0b\u306b\u57cb\u3082\u308c\u305f\u308a\u3001\u69cb\u9020\u7269\u306e\u88cf\u306b\u96a0\u308c\u305f\u308a\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Mount_the_Junction_Box_Securely\"><\/span>\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u3057\u3063\u304b\u308a\u3068\u56fa\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u3092\u57cb\u3081\u8fbc\u3080\u5834\u5408\u306f\u3001\u30dc\u30c3\u30af\u30b9\u306e\u30b5\u30a4\u30ba\u306b\u5408\u308f\u305b\u3066\u5929\u4e95\u307e\u305f\u306f\u5408\u677f\u306e\u8868\u9762\u306b\u958b\u53e3\u90e8\u3092\u5207\u308a\u629c\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002.<\/p>\n<p>\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u6881\u307e\u305f\u306f\u69cb\u9020\u90e8\u6750\u306b\u3057\u3063\u304b\u308a\u3068\u56fa\u5b9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30cd\u30b8\u3084\u30d6\u30e9\u30b1\u30c3\u30c8\u3092\u4f7f\u7528\u3057\u3066\u5b89\u5b9a\u3057\u3066\u8a2d\u7f6e\u3067\u304d\u307e\u3059\u3002\u30dc\u30c3\u30af\u30b9\u304c\u7de9\u3093\u3060\u308a\u3001\u65ad\u71b1\u6750\u306e\u4e0a\u306b\u7f6e\u304b\u308c\u305f\u308a\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Route_and_Secure_Wires\"><\/span>\u914d\u7dda\u3092\u6574\u7406\u3057\u3066\u56fa\u5b9a\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u6307\u5b9a\u3055\u308c\u305f\u30ce\u30c3\u30af\u30a2\u30a6\u30c8\u7a74\u306b\u30b1\u30fc\u30d6\u30eb\u3092\u901a\u3057\u307e\u3059\u3002\u30b1\u30fc\u30d6\u30eb\u306b\u306f\u3001\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u5185\u3067\u7c21\u5358\u306b\u63a5\u7d9a\u3067\u304d\u308b\u5341\u5206\u306a\u4f59\u88d5\u304c\u3042\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u305d\u306e\u5f8c\u3001\u30b1\u30fc\u30d6\u30eb\u30af\u30e9\u30f3\u30d7\/\u30b3\u30cd\u30af\u30bf\u3092\u4f7f\u7528\u3057\u3066\u30b1\u30fc\u30d6\u30eb\u3092\u56fa\u5b9a\u3057\u3001\u9069\u5207\u306a\u652f\u6301\u304c\u5f97\u3089\u308c\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002\u96fb\u7dda\u306f\u6025\u6fc0\u306b\u66f2\u3052\u305f\u308a\u3001\u6a5f\u68b0\u7684\u306a\u30b9\u30c8\u30ec\u30b9\u3092\u53d7\u3051\u305f\u308a\u3057\u306a\u3044\u3088\u3046\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Make_Electrical_Connections\"><\/span>\u96fb\u6c17\u63a5\u7d9a\u3092\u884c\u3046<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u627f\u8a8d\u6e08\u307f\u306e\u30b3\u30cd\u30af\u30bf\u3092\u4f7f\u7528\u3057\u3066\u3001\u7d76\u7e01\u88ab\u8986\u3092\u9069\u5207\u306a\u9577\u3055\u306b\u5265\u304c\u3057\u3001\u96fb\u7dda\u3092\u63a5\u7d9a\u3057\u307e\u3059\u3002\u6b21\u306b\u3001\u96fb\u6c17\u63a5\u7d9a\u56f3\u306b\u5f93\u3063\u3066\u96fb\u7dda\u3092\u6b63\u3057\u304f\u63a5\u7d9a\u3057\u307e\u3059\u3002\u3059\u3079\u3066\u306e\u96fb\u7dda\u304c\u3057\u3063\u304b\u308a\u3068\u63a5\u7d9a\u3055\u308c\u3001\u7d76\u7e01\u304c\u78ba\u4fdd\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u63a5\u5730\u7dda\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u3059\u3079\u3066\u306e\u63a5\u5730\u7dda\u3092\u63a5\u7d9a\u3057\u3001\u63a5\u5730\u30cd\u30b8\/\u63a5\u5730\u7aef\u5b50\u306b\u63a5\u7d9a\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Install_Junction_Box_Cover\"><\/span>\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u30ab\u30d0\u30fc\u3092\u53d6\u308a\u4ed8\u3051\u308b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3059\u3079\u3066\u306e\u30b1\u30fc\u30d6\u30eb\u3092\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306b\u5b89\u5168\u306b\u53ce\u7d0d\u3057\u3001\u30ab\u30d0\u30fc\u30d7\u30ec\u30fc\u30c8\u3092\u30cd\u30b8\u3067\u56fa\u5b9a\u3057\u3066\u30b1\u30fc\u30d6\u30eb\u3092\u640d\u50b7\u304b\u3089\u4fdd\u8b77\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306f\u624b\u306e\u5c4a\u304f\u7bc4\u56f2\u306b\u3042\u308a\u3001\u4ed6\u306e\u7269\u3067\u8986\u308f\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Final_Inspection_and_Restoration\"><\/span>\u6700\u7d42\u691c\u67fb\u3068\u4fee\u5fa9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u3053\u306e\u6bb5\u968e\u3067\u306f\u3001\u3059\u3079\u3066\u306e\u914d\u7dda\u304c\u3057\u3063\u304b\u308a\u3068\u63a5\u7d9a\u3055\u308c\u3066\u3044\u308b\u304b\u3001\u30b1\u30fc\u30d6\u30eb\u30af\u30e9\u30f3\u30d7\u304c\u3057\u3063\u304b\u308a\u3068\u7de0\u307e\u3063\u3066\u3044\u308b\u304b\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u70b9\u691c\u304c\u5b8c\u4e86\u3057\u305f\u3089\u3001\u96fb\u6e90\u3092\u5fa9\u65e7\u3055\u305b\u3066\u56de\u8def\u304c\u6b63\u5e38\u306b\u52d5\u4f5c\u3059\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Code_Requirements_for_Junction_Boxes_in_Attics\"><\/span>\u5c4b\u6839\u88cf\u90e8\u5c4b\u306b\u304a\u3051\u308b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306e\u898f\u5b9a\u8981\u4ef6<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50449\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Code-Requirements-for-Junction-Boxes-in-Attics.jpg\" alt=\"\u5c4b\u6839\u88cf\u90e8\u5c4b\u306b\u304a\u3051\u308b\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306e\u898f\u5b9a\u8981\u4ef6\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Code-Requirements-for-Junction-Boxes-in-Attics.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Code-Requirements-for-Junction-Boxes-in-Attics-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Code-Requirements-for-Junction-Boxes-in-Attics-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Code-Requirements-for-Junction-Boxes-in-Attics-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u96fb\u6c17\u4ed5\u69d8\u66f8\u3067\u306f\u3001\u5c4b\u6839\u88cf\u63a5\u7d9a\u7bb1\u306b\u95a2\u3057\u3066\u53b3\u683c\u306a\u898f\u5247\u304c\u5b9a\u3081\u3089\u308c\u3066\u304a\u308a\u3001\u3053\u308c\u306b\u3088\u308a\u914d\u96fb\u30b7\u30b9\u30c6\u30e0\u306e\u5b89\u5168\u6027\u3068\u4fe1\u983c\u6027\u304c\u4fdd\u8a3c\u3055\u308c\u307e\u3059\u3002\u5c4b\u6839\u88cf\u63a5\u7d9a\u7bb1\u306b\u95a2\u3059\u308b\u96fb\u6c17\u4ed5\u69d8\u66f8\u306e\u8a73\u7d30\u306a\u8981\u4ef6\u306f\u4ee5\u4e0b\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n<p><strong>\u30a2\u30af\u30bb\u30b7\u30d3\u30ea\u30c6\u30a3\u8981\u4ef6\uff08NEC 314.29\uff09<\/strong>\u63a5\u7d9a\u7bb1\u306f\u5bb9\u6613\u306b\u30a2\u30af\u30bb\u30b9\u3067\u304d\u308b\u5834\u6240\u306b\u8a2d\u7f6e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u58c1\u3001\u5929\u4e95\u3001\u307e\u305f\u306f\u6052\u4e45\u7684\u306b\u8986\u308f\u308c\u305f\u69cb\u9020\u7269\u306e\u88cf\u306b\u96a0\u3057\u3066\u306f\u306a\u308a\u307e\u305b\u3093\u3002.<\/p>\n<p><strong>\u53d6\u308a\u4ed8\u3051\u304a\u3088\u3073\u30b5\u30dd\u30fc\u30c8\u306b\u95a2\u3059\u308b\u8981\u4ef6<\/strong>\u63a5\u7d9a\u7bb1\u306f\u69cb\u9020\u90e8\u6750\u306b\u3057\u3063\u304b\u308a\u3068\u56fa\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u3001\u63a5\u7d9a\u7bb1\u306b\u5165\u308b\u30b1\u30fc\u30d6\u30eb\u306f\u30af\u30e9\u30f3\u30d7\u3092\u4f7f\u7528\u3057\u3066\u78ba\u5b9f\u306b\u56fa\u5b9a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<p><strong>\u5c0e\u4f53\u63a5\u7d9a\u8981\u4ef6<\/strong>\u30ef\u30a4\u30e4\u30b3\u30cd\u30af\u30bf\u3084\u7aef\u5b50\u306a\u3069\u3001\u627f\u8a8d\u3055\u308c\u305f\u63a5\u7d9a\u65b9\u6cd5\u3092\u4f7f\u7528\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u63a5\u7d9a\u306f\u6a5f\u68b0\u7684\u306a\u5b89\u5168\u6027\u3068\u9069\u5207\u306a\u7d76\u7e01\u3092\u4fdd\u8a3c\u3057\u307e\u3059\u3002.<\/p>\n<p><strong>\u9069\u7528\u57fa\u6e96\u3078\u306e\u6e96\u62e0<\/strong>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306f\u3001NEC\uff08\u5317\u7c73\u898f\u683c\uff09\u3084IEC\uff08\u56fd\u969b\u898f\u683c\uff09\u306a\u3069\u306e\u73fe\u5730\u306e\u96fb\u6c17\u898f\u683c\u306b\u6e96\u62e0\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cost_of_Junction_Box_Installation_in_Attic\"><\/span>\u5c4b\u6839\u88cf\u3078\u306e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u8a2d\u7f6e\u8cbb\u7528<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50452\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Cost-of-Junction-Box-Installation-in-Attic.jpg\" alt=\"\u5c4b\u6839\u88cf\u3078\u306e\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u8a2d\u7f6e\u8cbb\u7528\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Cost-of-Junction-Box-Installation-in-Attic.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Cost-of-Junction-Box-Installation-in-Attic-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Cost-of-Junction-Box-Installation-in-Attic-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Cost-of-Junction-Box-Installation-in-Attic-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" \/><\/p>\n<p>\u5c4b\u6839\u88cf\u3078\u306e\u63a5\u7d9a\u7bb1\u306e\u8a2d\u7f6e\u8cbb\u7528\u306f\u3001\u4f5c\u696d\u306e\u96e3\u6613\u5ea6\u3001\u4f7f\u7528\u3059\u308b\u6750\u6599\u306e\u7a2e\u985e\u3001\u914d\u7dda\u306e\u8907\u96d1\u3055\u306b\u3088\u3063\u3066\u7570\u306a\u308a\u307e\u3059\u304c\u3001\u901a\u5e38$100\u304b\u3089$300\u306e\u9593\u3067\u3059\u3002.<\/p>\n<p>\u5c4b\u6839\u88cf\u306e\u901a\u8def\u306f\u72ed\u304f\u3001\u9ad8\u6e29\u3067\u65ad\u71b1\u6027\u306b\u3082\u554f\u984c\u304c\u3042\u308b\u305f\u3081\u3001\u4f5c\u696d\u6642\u9593\u304c\u9577\u304f\u306a\u308a\u307e\u3059\u3002\u91d1\u5c5e\u88fd\u306e\u30d5\u30a1\u30f3\u5bfe\u5fdc\u30dc\u30c3\u30af\u30b9\u3068\u65b0\u3057\u3044\u914d\u7dda\u3092\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u3001\u901a\u5e38\u3001\u8cbb\u7528\u304c\u9ad8\u304f\u306a\u308a\u307e\u3059\u3002.<\/p>\n<p>\u8981\u7d04\u3059\u308b\u3068\u3001\u5c4b\u6839\u88cf\u914d\u7dda\u30dc\u30c3\u30af\u30b9\u306e\u8a2d\u7f6e\u306b\u304a\u3044\u3066\u3001\u4eba\u4ef6\u8cbb\u304c\u6700\u3082\u5927\u304d\u306a\u8981\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u4f7f\u7528\u3059\u308b\u6750\u6599\u306e\u9078\u629e\u3084\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u898f\u6a21\u3082\u6700\u7d42\u4fa1\u683c\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>\u3088\u304f\u3042\u308b\u8cea\u554f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_Junction_Box_Be_Covered_with_Attic_Insulation\"><\/span>\u63a5\u7d9a\u7bb1\u3092\u5c4b\u6839\u88cf\u65ad\u71b1\u6750\u3067\u8986\u3046\u3053\u3068\u306f\u3067\u304d\u307e\u3059\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u306f\u3044\u3002\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306f\u5c4b\u6839\u88cf\u306e\u65ad\u71b1\u6750\u3067\u8986\u3063\u3066\u3082\u69cb\u3044\u307e\u305b\u3093\u304c\u3001\u30a2\u30af\u30bb\u30b9\u53ef\u80fd\u306a\u72b6\u614b\u306b\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306f\u70b9\u691c\u3057\u3084\u3059\u3044\u5834\u6240\u306b\u8a2d\u7f6e\u3057\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u306b\u306f\u3001\u65ad\u71b1\u6750\u306e\u4e0a\u306b\u660e\u78ba\u306a\u8868\u793a\u3092\u4ed8\u3051\u308b\u304b\u3001\u5efa\u6750\u3092\u53d6\u308a\u5916\u3055\u306a\u304f\u3066\u3082\u5bb9\u6613\u306b\u8b58\u5225\u3067\u304d\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_Old_Attic_Junction_Boxes_Be_Reused_During_Upgrades\"><\/span>\u53e4\u3044\u5c4b\u6839\u88cf\u306e\u63a5\u7d9a\u30dc\u30c3\u30af\u30b9\u306f\u3001\u6539\u4fee\u5de5\u4e8b\u306e\u969b\u306b\u518d\u5229\u7528\u3067\u304d\u307e\u3059\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u306f\u3044\u3002\u5c4b\u6839\u88cf\u306b\u3042\u308b\u53e4\u3044\u63a5\u7d9a\u7bb1\u306f\u3001\u7834\u640d\u304c\u306a\u304f\u3001\u73fe\u884c\u306e\u96fb\u6c17\u5de5\u4e8b\u898f\u5b9a\u3092\u6e80\u305f\u3057\u3066\u3044\u308b\u5834\u5408\u306b\u9650\u308a\u518d\u5229\u7528\u3067\u304d\u307e\u3059\u3002\u53e4\u3044\u63a5\u7d9a\u7bb1\u304c\u7834\u640d\u3057\u3066\u3044\u305f\u308a\u3001\u8150\u98df\u3057\u3066\u3044\u305f\u308a\u3001\u65b0\u3057\u3044\u96fb\u6c17\u5de5\u4e8b\u898f\u5b9a\u306b\u9069\u5408\u3057\u3066\u3044\u306a\u3044\u5834\u5408\u306f\u3001\u5b89\u5168\u6027\u3068\u9069\u5408\u6027\u3092\u78ba\u4fdd\u3059\u308b\u305f\u3081\u306b\u65b0\u3057\u3044\u3082\u306e\u3068\u4ea4\u63db\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_Does_Humidity_Affect_Attic_Junction_Boxes\"><\/span>\u6e7f\u5ea6\u306f\u5c4b\u6839\u88cf\u306e\u63a5\u7d9a\u7bb1\u306b\u3069\u306e\u3088\u3046\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u306e\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u5c4b\u6839\u88cf\u306e\u6e7f\u6c17\u306f\u3001\u63a5\u7d9a\u7bb1\u5185\u90e8\u306b\u7d50\u9732\u3092\u5f15\u304d\u8d77\u3053\u3057\u3001\u91d1\u5c5e\u90e8\u54c1\u306e\u9306\u3073\u3001\u96fb\u7dda\u306e\u7d76\u7e01\u52a3\u5316\u3001\u77ed\u7d61\u30ea\u30b9\u30af\u306e\u5897\u52a0\u3001\u63a5\u7d9a\u4e0d\u826f\u306e\u539f\u56e0\u3068\u306a\u308a\u307e\u3059\u3002\u63a5\u7d9a\u7bb1\u306e\u4fe1\u983c\u6027\u306f\u6642\u9593\u3068\u3068\u3082\u306b\u4f4e\u4e0b\u3057\u3001\u5b89\u5168\u4e0a\u306e\u5371\u967a\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"How_Do_You_Locate_a_Hidden_Junction_Box_in_an_Attic\"><\/span>\u5c4b\u6839\u88cf\u306b\u96a0\u3055\u308c\u305f\u30b8\u30e3\u30f3\u30af\u30b7\u30e7\u30f3\u30dc\u30c3\u30af\u30b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u30b1\u30fc\u30d6\u30eb\u306e\u914d\u7dda\u3092\u305f\u3069\u308b\u3053\u3068\u3067\u3001\u63a5\u7d9a\u7bb1\u306e\u4f4d\u7f6e\u3092\u7279\u5b9a\u3067\u304d\u307e\u3059\u3002\u901a\u5e38\u3068\u306f\u7570\u306a\u308b\u914d\u7dda\u306e\u63a5\u7d9a\u7b87\u6240\u3084\u3001\u30b1\u30fc\u30d6\u30eb\u306e\u7d4c\u8def\u5909\u66f4\u7b87\u6240\u3092\u63a2\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002\u307e\u305f\u3001\u7167\u660e\u5668\u5177\u3084\u56de\u8def\u5206\u5c90\u4ed8\u8fd1\u3082\u78ba\u8a8d\u3059\u308b\u3068\u3001\u4f4d\u7f6e\u7279\u5b9a\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u56de\u8def\u30c8\u30ec\u30fc\u30b5\u30fc\u3092\u4f7f\u7528\u3059\u308b\u3053\u3068\u3082\u3001\u63a5\u7d9a\u7bb1\u306e\u4f4d\u7f6e\u7279\u5b9a\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_Thought\"><\/span>\u6700\u5f8c\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-50450\" src=\"http:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Final-Thought-1.jpg\" alt=\"\u6700\u5f8c\u306b\" width=\"1280\" height=\"720\" srcset=\"https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Final-Thought-1.jpg 1280w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Final-Thought-1-150x84.jpg 150w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Final-Thought-1-768x432.jpg 768w, https:\/\/www.kdmsteel.com\/wp-content\/uploads\/2026\/03\/Final-Thought-1-18x10.jpg 18w\" sizes=\"auto, (max-width: 1280px) 100vw, 1280px\" 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\u304a\u5ba2\u69d8\u306b\u6700\u9069\u306a\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u3054\u63d0\u4f9b\u3044\u305f\u3057\u307e\u3059\u3002.<\/p>","protected":false},"excerpt":{"rendered":"<p>The proper selection and installation of attic junction boxes directly impact the safety and reliability of electrical distribution systems. This article helps electrical engineers and system integrators understand the attic junction box types, the correct installation methods, and related standards, helping you make better decisions in your projects. What Is a Junction Box? A junction [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":50453,"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":"disabled","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-50423","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 v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Junction Box in Attic: Everything You Need to Know - 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\/ja\/\u5c4b\u6839\u88cf\u306b\u3042\u308b\u63a5\u7d9a\u7bb1\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Junction Box in Attic: Everything You Need to Know - KDM Steel\" \/>\n<meta property=\"og:description\" content=\"The proper selection and installation of attic junction boxes directly impact the safety and reliability of electrical distribution systems. 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This article helps electrical engineers and system integrators understand the attic junction box types, the correct installation methods, and related standards, helping you make better decisions in your projects. What Is a Junction Box? 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