{"id":9857,"date":"2020-12-28T10:43:42","date_gmt":"2020-12-28T10:43:42","guid":{"rendered":"https:\/\/thuvienxaydung.com.vn\/?p=9857"},"modified":"2021-12-28T10:46:18","modified_gmt":"2021-12-28T10:46:18","slug":"huong-dan-cach-tinh-tiet-dien-day-dan-dien-trong-nha","status":"publish","type":"post","link":"https:\/\/tailieuxaydung.net\/?p=9857","title":{"rendered":"H\u01b0\u1edbng d\u1eabn c\u00e1ch t\u00ednh ti\u1ebft di\u1ec7n d\u00e2y d\u1eabn \u0111i\u1ec7n trong nh\u00e0"},"content":{"rendered":"

Vi\u1ec7c l\u1ef1a ch\u1ecdn d\u00e2y\u00a0d\u1eabn \u0111i\u1ec7n ph\u00f9 h\u1ee3p\u00a0l\u00e0 vi\u1ec7c quan tr\u1ecdng\u00a0nh\u1eb1m \u0111\u00e1p \u1ee9ng ch\u00ednh x\u00e1c y\u00eau c\u1ea7u, an to\u00e0n v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed trong qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng, l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb \u0111i\u1ec7n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn c\u01a1 b\u1ea3n c\u00e1ch t\u00ednh ti\u1ebft di\u1ec7n d\u00e2y d\u1eabn \u0111i\u1ec7n cho nh\u00e0 ph\u1ed1, bi\u1ec7t th\u1ef1.<\/strong><\/p>\n

\n

Vi\u1ec7c ch\u1ecdn d\u00e2y d\u1eabn \u0111i\u1ec7n trong nh\u00e0 c\u1ea7n ph\u1ea3i t\u00ednh to\u00e1n v\u00e0 l\u1ef1a ch\u1ecdn theo c\u00e1c b\u01b0\u1edbc sau \u0111\u00e2y.<\/strong><\/p>\n

1. X\u00e1c \u0111\u1ecbnh ngu\u1ed3n \u0111i\u1ec7n s\u1ebd d\u00f9ng : 1 pha hay 3 pha
\n2. T\u00ednh t\u1ed5ng c\u00f4ng su\u1ea5t thi\u1ebft b\u1ecb ti\u00eau th\u1ee5 \u0111i\u1ec7n.
\n3. L\u1ef1a ch\u1ecdn d\u00e2y d\u1eabn cho t\u1eebng ph\u1ea7n c\u1ee7a nh\u00e0 \u1edf, bao g\u1ed3m 3 lo\u1ea1i:
\n\u00a0 + D\u00e2y ngo\u00e0i tr\u1eddi, k\u00e9o t\u1eeb c\u1ed9t \u0111\u1ed3ng h\u1ed3 v\u00e0o nh\u00e0.
\n+ D\u00e2y \u0111i\u1ec7n ch\u00ednh t\u1ed5ng c\u1ea3 nh\u00e0.
\n+ D\u00e2y cho t\u1eebng nh\u00e1nh v\u00e0 d\u00e2y \u0111\u1ebfn t\u1eebng thi\u1ebft b\u1ecb ti\u00eau th\u1ee5 \u0111i\u1ec7n.<\/em><\/p>\n

X\u00e1c \u0111\u1ecbnh ngu\u1ed3n \u0111i\u1ec7n<\/h2>\n

Ngu\u1ed3n \u0111i\u1ec7n s\u1eed d\u1ee5ng trong nh\u00e0, nh\u00e0 ph\u1ed1, bi\u1ec7t th\u1ef1 th\u00f4ng th\u01b0\u1eddng l\u00e0 ngu\u1ed3n 1 pha, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1ch ch\u1ecdn ti\u1ebft di\u1ec7n d\u00e2y \u0111i\u1ec7n cho ngu\u1ed3n 1 pha.<\/p>\n

T\u00ednh to\u00e1n th\u00f4ng s\u1ed1<\/h2>\n

T\u00ednh to\u00e1n th\u00f4ng s\u1ed1 c\u00f4ng xu\u1ea5t t\u1ed5ng thi\u1ebft b\u1ecb \u0111i\u1ec7n trong nh\u00e0 \u1edf m\u1ee9c cao \u0111i\u1ec3m nh\u1ea5t (d\u00f9ng \u0111\u1ed3ng th\u1eddi), d\u1ef1a v\u00e0o c\u00f4ng th\u1ee9c \u0111\u1ec3 c\u00f3 th\u00f4ng s\u1ed1 ti\u1ebft di\u1ec7n d\u00e2y ch\u00ednh x\u00e1c. V\u00e0 lu\u00f4n n\u00ean ch\u1ecdn mua ti\u1ebft di\u1ec7n d\u00e2y l\u1edbn h\u01a1n m\u1ed9t c\u1ea5p \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n, v\u00e0 c\u00f3 th\u00eam thi\u1ebft b\u1ecb \u0111i\u1ec7n m\u1edbi trong nh\u00e0 v\u1ec1 sau.<\/p>\n

C\u00f4ng th\u1ee9c t\u00ednh ti\u1ebft di\u1ec7n d\u00e2y d\u1eabn<\/h2>\n

T\u00ednh c\u00f4ng xu\u1ea5t<\/h3>\n

B\u1eb1ng c\u00e1ch t\u00ednh c\u1ed9ng t\u1ed5ng c\u00f4ng su\u1ea5t c\u1ee7a c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n trong nh\u00e0 m\u00ecnh, v\u00e0 d\u1ef1 tr\u00f9 trong t\u01b0\u01a1ng lai.
\n(v\u00ed d\u1ee5:\u00a0Qu\u1ea1t 40-60W,\u00a0Tivi: 40-100W, m\u00e1y l\u1ea1nh 750W\u2026 c\u1ed9ng t\u1ea5t c\u1ea3 l\u1ea1i c\u00f3 c\u00f4ng xu\u1ea5t t\u1ed5ng)<\/em><\/p>\n

T\u00ednh d\u00f2ng \u0111i\u1ec7n<\/strong><\/h3>\n

C\u00f4ng th\u1ee9c: I=P\/U<\/strong>
\nTrong \u0111\u00f3:<\/em><\/u>
\n– I: C\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n (A)
\n\u2013 P: T\u1ed5ng c\u00f4ng su\u1ea5t (kW)
\n\u2013 U: hi\u1ec7u \u0111i\u1ec7n th\u1ebf: 220V
\n????D\u1ef1a v\u00e0o\u00a0c\u00f4ng xu\u1ea5t t\u1ed5ng<\/strong>\u00a0v\u00e0\u00a0hi\u1ec7u \u0111i\u1ec7n th\u1ebf<\/strong>, ta c\u00f3 th\u00f4ng s\u1ed1\u00a0c\u01b0\u1eddng \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n (A)<\/strong>, d\u1ef1a v\u00e0o c\u00f4ng th\u1ee9c b\u00ean d\u01b0\u1edbi \u0111\u1ec3 t\u00ednh ti\u1ebft di\u1ec7n.<\/em><\/p>\n

T\u00ednh ti\u1ebft di\u1ec7n<\/strong><\/h3>\n

C\u00f4ng th\u1ee9c:\u00a0S=I\/J<\/strong>
\nTrong \u0111\u00f3:<\/u><\/em>
\n\u2013 J: l\u00e0 m\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n cho ph\u00e9p\u00a0(A\/mm\u00b2)<\/strong>
\n\u2013 S: l\u00e0 ti\u1ebft di\u1ec7n d\u00e2y d\u1eabn\u00a0(mm\u00b2)<\/strong>
\n+ \u0110\u1ed1i v\u1edbi d\u00e2y \u0111\u1ed3ng: M\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n cho ph\u00e9p J\u0111 = 6 A\/mm\u00b2
\n+ \u0110\u1ed1i v\u1edbi d\u00e2y nh\u00f4m: M\u1eadt \u0111\u1ed9 d\u00f2ng \u0111i\u1ec7n cho ph\u00e9p Jn = 4,5 A\/mm\u00b2<\/strong><\/em>
\n????C\u00f3 th\u00f4ng s\u1ed1 ti\u1ebft di\u1ec7n (S), ch\u00fang ta s\u1ebd d\u1ef1a v\u00e0o \u0111\u00f3 \u0111\u1ec3 l\u1ef1a ch\u1ecdn d\u00e2y \u0111i\u1ec7n, xem b\u00ean d\u01b0\u1edbi \u0111\u1ec3 ch\u1ecdn.<\/strong><\/em><\/p>\n

\"B\u1ea3ng
B\u1ea3ng ch\u1ecdn ti\u1ebft di\u1ec7n d\u00e2y d\u1eabn theo d\u00f2ng \u0111i\u1ec7n<\/figcaption><\/figure>\n

L\u1ef1a ch\u1ecdn d\u00e2y d\u1eabn<\/h2>\n

Sau khi c\u00f3\u00a0th\u00f4ng s\u1ed1 ti\u1ebft di\u1ec7n (S)<\/strong>\u00a0lu\u00f4n n\u00ean ch\u1ecdn d\u00e2y \u0111i\u1ec7n l\u1edbn h\u01a1n t\u00ednh to\u00e1n\u00a01 c\u1ea5p<\/strong>\u00a0\u0111\u1ec3 d\u1ef1 ph\u00f2ng an to\u00e0n\u00a0v\u00e0 n\u00e2ng c\u1ea5p ph\u1ee5 t\u1ea3i sau n\u00e0y. V\u00ec th\u00f4ng th\u01b0\u1eddng sau m\u1ed9t th\u1eddi gian s\u1ebd ph\u00e1t sinh nhi\u1ec1u thi\u1ebft b\u1ecb \u0111i\u1ec7n th\u00eam trong nh\u00e0.<\/p>\n

D\u00e2y d\u1eabn ngo\u00e0i tr\u1eddi<\/strong><\/h3>\n

L\u00e0 d\u00e2y d\u1eabn t\u1eeb tr\u1ee5 \u0111i\u1ec7n \u0111\u1ebfn \u0111\u1ed3ng h\u1ed3 \u0111i\u1ec7n l\u1ef1c trong nh\u00e0.
\n\u0110o\u1ea1n d\u00e2y n\u00e0y l\u00e0 d\u00e2y n\u1ed1i t\u1eeb l\u01b0\u1edbi \u0111i\u1ec7n \u0111\u1ecba ph\u01b0\u01a1ng v\u00e0o \u0111\u1ebfn nh\u00e0, th\u00f4ng th\u01b0\u1eddng \u0111o\u1ea1n d\u00e2y n\u00e0y n\u1eb1m ho\u00e0n to\u00e0n ngo\u00e0i tr\u1eddi. \u0110o\u1ea1n d\u00e2y ngo\u00e0i tr\u1eddi n\u00e0y th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0110i\u1ec7n l\u1ef1c \u0111\u1ecba ph\u01b0\u01a1ng cung c\u1ea5p khi \u0111\u0103ng k\u00fd m\u1edf c\u00f4ng t\u01a1 \u0111i\u1ec7n m\u1edbi. V\u00ec v\u1eady ch\u00fang ta kh\u00f4ng c\u1ea7n quan t\u00e2m!<\/p>\n

D\u00e2y d\u1eabn ch\u00ednh<\/strong><\/h3>\n

L\u00e0 d\u00e2y t\u1eeb\u00a0\u0111\u1ed3ng h\u1ed3 \u0111i\u1ec7n\u00a0\u0111\u1ebfn t\u1ee7 ch\u00ednh v\u00e0 t\u1eeb t\u1ee7 ch\u00ednh \u0111\u1ebfn c\u00e1c khu v\u1ef1c (v\u00ed d\u1ee5\u00a0t\u1ea7ng 1, t\u1ea7ng 2, t\u1ea7ng\u00a03\u2026)<\/p>\n

    \n
  • B\u01b0\u1edbc 1. T\u1ed5ng c\u00f4ng su\u1ea5t c\u00e1c thi\u1ebft b\u1ecb \u0111i\u1ec7n d\u00f9ng \u0111\u1ed3ng th\u1eddi trong gia \u0111\u00ecnh v\u00ed d\u1ee5 P = 5 kW.<\/li>\n
  • B\u01b0\u1edbc 2. \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh d\u00f2ng \u0111i\u1ec7n: I=P\/U -> I= 5*1000\/220 = 22.72 A.<\/li>\n
  • B\u01b0\u1edbc 3: \u00c1p d\u1ee5ng c\u00f4ng th\u1ee9c t\u00ednh ti\u1ebft di\u1ec7n: S=I\/J -> S=22.72\/6 = 3.78 mm\u00b2.<\/li>\n
  • B\u01b0\u1edbc 4. Tr\u00ean th\u1ecb tr\u01b0\u1eddng c\u00f3 c\u00e1c lo\u1ea1i d\u00e2y c\u1ee1 4mm\u00b2 v\u00e0 6mm\u00b2. Ta ch\u1ecdn l\u1edbn h\u01a1n 1 c\u1ea5p l\u00e0 6 mm\u00b2.<\/li>\n<\/ul>\n

    ????\u00a0T\u01af\u01a0NG T\u1ef0 C\u00c1CH T\u00cdNH \u0110\u1ec2 \u0110I D\u00c2Y C\u1ea4P NGU\u1ed2N CHO KHU V\u1ef0C (B\u1ebfp t\u1eeb, h\u1ed3ng ngo\u1ea1i, l\u00f2 vi song, \u1ea5m si\u00eau t\u1ed1c\u2026)<\/strong><\/p>\n

    D\u00e2y d\u1eabn nh\u00e1nh<\/strong><\/h3>\n

    L\u00e0 d\u00e2y d\u1eabn \u0111i\u1ec7n \u0111\u1ebfn c\u00e1c\u00a0\u1ed5 \u0111i\u1ec7n v\u00e0 c\u00e1c\u00a0thi\u1ebft b\u1ecb chi\u1ebfu s\u00e1ng\u00a0nh\u01b0 b\u00f3ng \u0111\u00e8n,\u00a0t\u1ee7 l\u1ea1nh, m\u00e1y l\u1ea1nh, tivi\u2026<\/p>\n

      \n
    • \u0110\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb nh\u01b0: \u1ed5 c\u1eafm \u0111i\u1ec7n, c\u00f4ng t\u1eafc \u0111i\u1ec7n \u0111\u1ebfn \u0111\u00e8n, qu\u1ea1t, ti vi, t\u1ee7 l\u1ea1nh ho\u1eb7c c\u00e1c thi\u1ebft b\u1ecb c\u00f3 c\u00f4ng su\u1ea5t d\u01b0\u1edbi 1kW th\u00ec n\u00ean d\u00f9ng \u0111\u1ed3ng lo\u1ea1i d\u00e2y s\u00fap m\u1ec1m, ti\u1ebft di\u1ec7n 2 x 1,5 mm\u00b2.<\/li>\n
    • \u0110\u1ed1i v\u1edbi c\u00e1c thi\u1ebft b\u1ecb nh\u01b0: b\u1ebfp \u0111i\u1ec7n, l\u00f2 s\u01b0\u1edfi\u2026 c\u00f3 c\u00f4ng su\u1ea5t t\u1eeb 1kW \u0111\u1ebfn 2kW n\u00ean d\u00f9ng lo\u1ea1i c\u00e1p PVC c\u00f3 2 l\u1edbp c\u00e1ch \u0111i\u1ec7n, ti\u1ebft di\u1ec7n 2 x 2,5\u00a0mm\u00b2 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n c\u1ea3 v\u1ec1 \u0111i\u1ec7n v\u00e0 v\u1ec1 c\u01a1.<\/li>\n
    • \u0110\u1ed1i v\u1edbi thi\u1ebft b\u1ecb \u0111i\u1ec7n kh\u00e1c c\u00f3 c\u00f4ng su\u1ea5t l\u1edbn h\u01a1n 2kW th\u00ec ph\u1ea3i tu\u1ef3 theo c\u00f4ng su\u1ea5t m\u00e0 t\u00ednh to\u00e1n ch\u1ecdn ti\u1ebft di\u1ec7n d\u00e2y nh\u01b0 tr\u00ean \u0111\u00e3 h\u01b0\u1edbng d\u1eabn.<\/li>\n<\/ul>\n

      TH\u00d4NG TH\u01af\u1edcNG THEO KINH NGHI\u1ec6M T\u00cdNH TO\u00c1N \u0110\u1ed0I V\u1edaI NH\u00c0 PH\u1ed0 CH\u00daNG TA \u00a0HAY CH\u1eccN<\/strong>
      \n\u0110\u1ed1i v\u1edbi d\u00e2y c\u1ea5p ngu\u1ed3n \u0111i t\u1eebng t\u1ea7ng, ph\u00f2ng trong nh\u00e0 t\u00f9y theo m\u1ee9c \u0111\u1ed9 b\u1ed1 tr\u00ed \u0111\u1ed3 d\u00f9ng s\u1eed d\u1ee5ng \u0111i\u1ec7n m\u00e0 ta ch\u1ecdn nh\u01b0 sau: chia t\u1ea3i theo t\u1ea7ng ch\u1ecdn ti\u1ebft di\u1ec7n 4 mm\u00b2, c\u1ea5p ngu\u1ed3n cho c\u00e1c \u1ed5 c\u1eafm ch\u1ecdn d\u00e2y 2,5 mm\u00b2, d\u00e2y chi\u1ebfu s\u00e1ng ch\u1ecdn 1-1,5\u00a0mm\u00b2.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

      Vi\u1ec7c l\u1ef1a ch\u1ecdn d\u00e2y\u00a0d\u1eabn \u0111i\u1ec7n ph\u00f9 h\u1ee3p\u00a0l\u00e0 vi\u1ec7c quan tr\u1ecdng\u00a0nh\u1eb1m \u0111\u00e1p \u1ee9ng ch\u00ednh x\u00e1c y\u00eau c\u1ea7u, an to\u00e0n v\u00e0 ti\u1ebft ki\u1ec7m chi ph\u00ed trong qu\u00e1 tr\u00ecnh x\u00e2y d\u1ef1ng, l\u1eafp \u0111\u1eb7t thi\u1ebft b\u1ecb \u0111i\u1ec7n. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn c\u01a1 b\u1ea3n c\u00e1ch t\u00ednh ti\u1ebft di\u1ec7n d\u00e2y d\u1eabn \u0111i\u1ec7n cho nh\u00e0 ph\u1ed1, bi\u1ec7t th\u1ef1. Vi\u1ec7c ch\u1ecdn d\u00e2y…<\/p>\n","protected":false},"author":1,"featured_media":9862,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-9857","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/9857","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=9857"}],"version-history":[{"count":3,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/9857\/revisions"}],"predecessor-version":[{"id":9861,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/posts\/9857\/revisions\/9861"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=\/wp\/v2\/media\/9862"}],"wp:attachment":[{"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=9857"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=9857"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tailieuxaydung.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=9857"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}