{"id":4941,"date":"2023-08-03T16:34:50","date_gmt":"2023-08-03T16:34:50","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=4941"},"modified":"2023-08-03T16:34:50","modified_gmt":"2023-08-03T16:34:50","slug":"national-electrical-code-nec-rules-for-outdoor-wiring","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/vi\/life\/home-improvement\/national-electrical-code-nec-rules-for-outdoor-wiring\/","title":{"rendered":"Quy t\u1eafc c\u1ee7a NEC v\u1ec1 h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn ngo\u00e0i tr\u1eddi: \u0110\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 chi\u1ebfu s\u00e1ng h\u1ee3p l\u00fd"},"content":{"rendered":"<h2 class=\"wp-block-heading\">Quy t\u1eafc c\u1ee7a B\u1ed9 lu\u1eadt \u0111i\u1ec7n qu\u1ed1c gia (NEC) \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn ngo\u00e0i tr\u1eddi<\/h2>\n\n<h2 class=\"wp-block-heading\">C\u00e1c \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi<\/h2>\n\n<p>NEC bao g\u1ed3m c\u00e1c quy t\u1eafc c\u1ee5 th\u1ec3 \u0111\u1ec3 l\u1eafp \u0111\u1eb7t c\u00e1c \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi nh\u1eb1m \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 ng\u0103n ng\u1eeba nguy c\u01a1 \u0111i\u1ec7n gi\u1eadt. C\u00e1c quy t\u1eafc n\u00e0y bao g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>B\u1ea3o v\u1ec7 GFCI:<\/strong> T\u1ea5t c\u1ea3 c\u00e1c \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi ph\u1ea3i c\u00f3 thi\u1ebft b\u1ecb ng\u1eaft m\u1ea1ch h\u1edf \u0111\u1ea5t (GFCI) \u0111\u1ec3 ng\u0103n ng\u1eeba \u0111i\u1ec7n gi\u1eadt.<\/li>\n<li><strong>T\u00ednh d\u1ec5 ti\u1ebfp c\u1eadn:<\/strong> C\u00e1c ng\u00f4i nh\u00e0 ph\u1ea3i c\u00f3 \u00edt nh\u1ea5t m\u1ed9t \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi \u1edf ph\u00eda tr\u01b0\u1edbc v\u00e0 ph\u00eda sau, d\u1ec5 d\u00e0ng ti\u1ebfp c\u1eadn t\u1eeb m\u1eb7t \u0111\u1ea5t v\u00e0 kh\u00f4ng cao qu\u00e1 6 1\/2 feet so v\u1edbi m\u1eb7t \u0111\u1ea5t.<\/li>\n<li><strong>\u1ed4 c\u1eafm \u1edf s\u00e0n v\u00e0 ban c\u00f4ng:<\/strong> C\u00e1c s\u00e0n v\u00e0 ban c\u00f4ng g\u1eafn li\u1ec1n c\u00f3 l\u1ed1i \u0111i v\u00e0o b\u00ean trong ph\u1ea3i c\u00f3 \u1ed5 c\u1eafm kh\u00f4ng cao qu\u00e1 6 1\/2 feet so v\u1edbi b\u1ec1 m\u1eb7t \u0111i b\u1ed9.<\/li>\n<li><strong>Ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eddi ti\u1ebft:<\/strong> C\u00e1c \u1ed5 c\u1eafm \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt (d\u01b0\u1edbi c\u00e1c t\u1ea5m ph\u1ee7 b\u1ea3o v\u1ec7) ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eddi ti\u1ebft v\u1edbi n\u1eafp ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc.<\/li>\n<li><strong>Nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt:<\/strong> C\u00e1c \u1ed5 c\u1eafm \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt (ti\u1ebfp x\u00fac v\u1edbi th\u1eddi ti\u1ebft) ph\u1ea3i c\u00f3 kh\u1ea3 n\u0103ng ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eddi ti\u1ebft v\u1edbi n\u1eafp ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc &#8220;\u0111ang s\u1eed d\u1ee5ng&#8221;.<\/li>\n<li><strong>Ti\u1ebfp c\u1eadn h\u1ed3 b\u01a1i:<\/strong> M\u1ed9t h\u1ed3 b\u01a1i c\u1ed1 \u0111\u1ecbnh ph\u1ea3i c\u00f3 \u1ed5 c\u1eafm \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng GFCI, kh\u00f4ng g\u1ea7n h\u01a1n 6 feet v\u00e0 kh\u00f4ng xa h\u01a1n 20 feet so v\u1edbi m\u00e9p h\u1ed3 b\u01a1i, kh\u00f4ng cao h\u01a1n 6 1\/2 feet so v\u1edbi s\u00e0n h\u1ed3 b\u01a1i.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng m\u00e1y b\u01a1m:<\/strong> C\u00e1c \u1ed5 c\u1eafm cho h\u1ec7 th\u1ed1ng m\u00e1y b\u01a1m h\u1ed3 b\u01a1i v\u00e0 spa ph\u1ea3i c\u00e1ch h\u1ed3 b\u01a1i v\u00e0 spa \u00edt nh\u1ea5t 10 feet n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng GFCI v\u00e0 c\u00e1ch \u00edt nh\u1ea5t 6 feet n\u1ebfu \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1eb1ng GFCI.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">Chi\u1ebfu s\u00e1ng ngo\u00e0i tr\u1eddi<\/h2>\n\n<p>NEC c\u0169ng cung c\u1ea5p c\u00e1c quy t\u1eafc v\u1ec1 chi\u1ebfu s\u00e1ng ngo\u00e0i tr\u1eddi \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 chi\u1ebfu s\u00e1ng h\u1ee3p l\u00fd. C\u00e1c quy t\u1eafc n\u00e0y bao g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>X\u1ebfp h\u1ea1ng v\u1ecb tr\u00ed:<\/strong> \u0110\u00e8n chi\u1ebfu s\u00e1ng \u1edf nh\u1eefng khu v\u1ef1c \u1ea9m \u01b0\u1edbt\/ti\u1ebfp x\u00fac v\u1edbi m\u00f4i tr\u01b0\u1eddng ph\u1ea3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u0111\u1ec3 s\u1eed d\u1ee5ng \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt. \u0110\u00e8n chi\u1ebfu s\u00e1ng \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt (\u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 b\u1edfi m\u00e1i hi\u00ean ho\u1eb7c m\u00e1i nh\u00e0) ph\u1ea3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u0111\u1ec3 s\u1eed d\u1ee5ng \u1edf nh\u1eefng n\u01a1i \u1ea9m \u01b0\u1edbt.<\/li>\n<li><strong>H\u1ed9p g\u1eafn tr\u00ean b\u1ec1 m\u1eb7t:<\/strong> C\u00e1c h\u1ed9p \u0111i\u1ec7n cho t\u1ea5t c\u1ea3 c\u00e1c \u0111\u00e8n chi\u1ebfu s\u00e1ng ngo\u00e0i tr\u1eddi ph\u1ea3i ch\u1ed1ng m\u01b0a\/ch\u1ecbu \u0111\u01b0\u1ee3c th\u1eddi ti\u1ebft.<\/li>\n<li><strong>B\u1ea3o v\u1ec7 GFCI:<\/strong> \u0110\u00e8n chi\u1ebfu s\u00e1ng ngo\u00e0i tr\u1eddi kh\u00f4ng y\u00eau c\u1ea7u b\u1ea3o v\u1ec7 GFCI.<\/li>\n<li><strong>Chi\u1ebfu s\u00e1ng \u0111i\u1ec7n \u00e1p th\u1ea5p:<\/strong> H\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng \u0111i\u1ec7n \u00e1p th\u1ea5p ph\u1ea3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea b\u1edfi c\u01a1 quan th\u1eed nghi\u1ec7m \u0111\u01b0\u1ee3c ch\u1ea5p thu\u1eadn v\u00e0 \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t theo h\u01b0\u1edbng d\u1eabn c\u1ee7a nh\u00e0 s\u1ea3n xu\u1ea5t.<\/li>\n<li><strong>G\u1ea7n h\u1ed3 b\u01a1i:<\/strong> \u0110\u00e8n chi\u1ebfu s\u00e1ng \u0111i\u1ec7n \u00e1p th\u1ea5p ph\u1ea3i c\u00e1ch \u00edt nh\u1ea5t 5 feet so v\u1edbi c\u00e1c b\u1ee9c t\u01b0\u1eddng b\u00ean ngo\u00e0i c\u1ee7a h\u1ed3 b\u01a1i, spa ho\u1eb7c b\u1ed3n n\u01b0\u1edbc n\u00f3ng.<\/li>\n<li><strong>V\u1ecb tr\u00ed m\u00e1y bi\u1ebfn \u00e1p:<\/strong> C\u00e1c m\u00e1y bi\u1ebfn \u00e1p cho h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng \u0111i\u1ec7n \u00e1p th\u1ea5p ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf nh\u1eefng n\u01a1i d\u1ec5 ti\u1ebfp c\u1eadn.<\/li>\n<li><strong>V\u1ecb tr\u00ed c\u00f4ng t\u1eafc:<\/strong> C\u00e1c c\u00f4ng t\u1eafc \u0111i\u1ec1u khi\u1ec3n \u0111\u00e8n chi\u1ebfu s\u00e1ng ho\u1eb7c m\u00e1y b\u01a1m h\u1ed3 b\u01a1i ho\u1eb7c spa ph\u1ea3i c\u00e1ch \u00edt nh\u1ea5t 5 feet so v\u1edbi c\u00e1c b\u1ee9c t\u01b0\u1eddng b\u00ean ngo\u00e0i c\u1ee7a h\u1ed3 b\u01a1i ho\u1eb7c spa, tr\u1eeb khi \u0111\u01b0\u1ee3c ng\u0103n c\u00e1ch b\u1edfi m\u1ed9t b\u1ee9c t\u01b0\u1eddng.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">C\u00e1p v\u00e0 \u1ed1ng d\u1eabn ngo\u00e0i tr\u1eddi<\/h2>\n\n<p>NEC quy \u0111\u1ecbnh vi\u1ec7c s\u1eed d\u1ee5ng c\u00e1p v\u00e0 \u1ed1ng d\u1eabn cho h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn ngo\u00e0i tr\u1eddi \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u1ec1 \u0111i\u1ec7n v\u00e0 b\u1ea3o v\u1ec7 kh\u1ecfi \u0111\u1ed9 \u1ea9m v\u00e0 h\u01b0 h\u1ecfng. C\u00e1c quy t\u1eafc n\u00e0y bao g\u1ed3m:<\/p>\n\n<ul class=\"wp-block-list\">\n<li><strong>D\u00e2y \u0111i\u1ec7n \u0111\u1ec3 l\u1ed9:<\/strong> D\u00e2y \u0111i\u1ec7n\/c\u00e1p \u0111\u1ec3 l\u1ed9 ho\u1eb7c ch\u00f4n ng\u1ea7m ph\u1ea3i \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea \u0111\u1ec3 s\u1eed d\u1ee5ng ngo\u00e0i tr\u1eddi. C\u00e1p lo\u1ea1i UF th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn ngo\u00e0i tr\u1eddi d\u00e2n d\u1ee5ng.<\/li>\n<li><strong>Ch\u00f4n ng\u1ea7m:<\/strong> C\u00e1p UF c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u00f4n tr\u1ef1c ti\u1ebfp ng\u1ea7m m\u00e0 kh\u00f4ng c\u1ea7n \u1ed1ng d\u1eabn v\u1edbi \u0111\u1ed9 s\u00e2u l\u1edbp \u0111\u1ea5t ph\u1ee7 t\u1ed1i thi\u1ec3u l\u00e0 24 inch.<\/li>\n<li><strong>S\u1eed d\u1ee5ng \u1ed1ng d\u1eabn:<\/strong> H\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c ch\u00f4n ng\u1ea7m b\u00ean trong \u1ed1ng d\u1eabn kim lo\u1ea1i c\u1ee9ng (RMC) ho\u1eb7c \u1ed1ng d\u1eabn kim lo\u1ea1i trung gian (IMC) ph\u1ea3i c\u00f3 \u0111\u1ed9 s\u00e2u l\u1edbp \u0111\u1ea5t ph\u1ee7 t\u1ed1i thi\u1ec3u l\u00e0 6 inch; h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn trong \u1ed1ng d\u1eabn PVC ph\u1ea3i c\u00f3 \u0111\u1ed9 s\u00e2u l\u1edbp \u0111\u1ea5t ph\u1ee7 t\u1ed1i thi\u1ec3u l\u00e0 18 inch.<\/li>\n<li><strong>V\u1eadt li\u1ec7u l\u1ea5p \u0111\u1ea7y:<\/strong> V\u1eadt li\u1ec7u l\u1ea5p \u0111\u1ea7y xung quanh \u1ed1ng d\u1eabn ho\u1eb7c c\u00e1p ph\u1ea3i l\u00e0 v\u1eadt li\u1ec7u d\u1ea1ng h\u1ea1t m\u1ecbn kh\u00f4ng c\u00f3 \u0111\u00e1.<\/li>\n<li><strong>H\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n \u00e1p th\u1ea5p:<\/strong> H\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n \u00e1p th\u1ea5p (mang \u0111i\u1ec7n \u00e1p kh\u00f4ng qu\u00e1 30 volt) ph\u1ea3i \u0111\u01b0\u1ee3c ch\u00f4n \u1edf \u0111\u1ed9 s\u00e2u \u00edt nh\u1ea5t 6 inch.<\/li>\n<li><strong>Chuy\u1ec3n \u0111\u1ed5i t\u1eeb ng\u1ea7m l\u00ean tr\u00ean m\u1eb7t \u0111\u1ea5t:<\/strong> H\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn \u0111\u01b0\u1ee3c ch\u00f4n ng\u1ea7m chuy\u1ec3n \u0111\u1ed5i t\u1eeb ng\u1ea7m l\u00ean tr\u00ean m\u1eb7t \u0111\u1ea5t ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 trong \u1ed1ng d\u1eabn t\u1eeb \u0111\u1ed9 s\u00e2u l\u1edbp \u0111\u1ea5t ph\u1ee7 y\u00eau c\u1ea7u ho\u1eb7c 18 inch (t\u00f9y theo m\u1ee9c n\u00e0o nh\u1ecf h\u01a1n) \u0111\u1ebfn \u0111i\u1ec3m k\u1ebft th\u00fac tr\u00ean m\u1eb7t \u0111\u1ea5t ho\u1eb7c \u00edt nh\u1ea5t 8 feet so v\u1edbi m\u1eb7t \u0111\u1ea5t.<\/li>\n<li><strong>D\u00e2y d\u1ecbch v\u1ee5 \u0111i\u1ec7n:<\/strong> D\u00e2y d\u1ecbch v\u1ee5 \u0111i\u1ec7n v\u01b0\u1ee3t qua h\u1ed3 b\u01a1i, spa ho\u1eb7c b\u1ed3n n\u01b0\u1edbc n\u00f3ng ph\u1ea3i cao h\u01a1n \u00edt nh\u1ea5t 22 1\/2 feet so v\u1edbi m\u1eb7t n\u01b0\u1edbc ho\u1eb7c b\u1ee5c nh\u1ea3y.<\/li>\n<li><strong>D\u00e2y truy\u1ec1n d\u1eef li\u1ec7u:<\/strong> D\u00e2y truy\u1ec1n d\u1eef li\u1ec7u ph\u1ea3i c\u00e1ch m\u1eb7t n\u01b0\u1edbc \u00edt nh\u1ea5t 10 feet trong h\u1ed3 b\u01a1i, spa v\u00e0 b\u1ed3n n\u01b0\u1edbc n\u00f3ng.<\/li>\n<\/ul>\n\n<h2 class=\"wp-block-heading\">G\u1ecdi tr\u01b0\u1edbc khi \u0111\u00e0o<\/h2>\n\n<p>Tr\u01b0\u1edbc khi \u0111\u00e0o b\u1ea5t c\u1ee9 n\u01a1i n\u00e0o tr\u00ean \u0111\u1ea5t c\u1ee7a b\u1ea1n, h\u00e3y g\u1ecdi 811, \u0111\u01b0\u1eddng d\u00e2y n\u00f3ng qu\u1ed1c gia \u201cG\u1ecdi tr\u01b0\u1edbc khi \u0111\u00e0o\u201d \u0111\u1ec3 ng\u0103n ng\u1eeba thi\u1ec7t h\u1ea1i cho c\u00e1c ti\u1ec7n \u00edch ng\u1ea7m v\u00e0 th\u01b0\u01a1ng t\u00edch ti\u1ec1m \u1ea9n. C\u00e1c nh\u00e0 cung c\u1ea5p ti\u1ec7n \u00edch s\u1ebd \u0111\u00e1nh d\u1ea5u \u0111\u01b0\u1eddng d\u00e2y c\u1ee7a h\u1ecd, cho ph\u00e9p b\u1ea1n \u0111\u00e0o m\u1ed9t c\u00e1ch an to\u00e0n.<\/p>","protected":false},"excerpt":{"rendered":"<p>Quy t\u1eafc c\u1ee7a B\u1ed9 lu\u1eadt \u0111i\u1ec7n qu\u1ed1c gia (NEC) \u0111\u1ed1i v\u1edbi h\u1ec7 th\u1ed1ng d\u00e2y d\u1eabn ngo\u00e0i tr\u1eddi C\u00e1c \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi NEC bao g\u1ed3m c\u00e1c quy t\u1eafc c\u1ee5 th\u1ec3&hellip;<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8844],"tags":[8840,8843,8841,8842],"class_list":["post-4941","post","type-post","status-publish","format-standard","hentry","category-home-improvement","tag-electrical-safety","tag-home-safety","tag-outdoor-wiring","tag-nec-compliance"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/4941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/comments?post=4941"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/4941\/revisions"}],"predecessor-version":[{"id":4942,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/4941\/revisions\/4942"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/media?parent=4941"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/categories?post=4941"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/tags?post=4941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}