{"id":8513,"date":"2024-10-28T00:47:19","date_gmt":"2024-10-27T16:47:19","guid":{"rendered":"https:\/\/viox.com\/?p=8513"},"modified":"2024-10-28T08:15:55","modified_gmt":"2024-10-28T00:15:55","slug":"understanding-junction-boxes-essential-components-for-safe-and-efficient-electrical-systems","status":"publish","type":"post","link":"https:\/\/test.viox.com\/vi\/understanding-junction-boxes-essential-components-for-safe-and-efficient-electrical-systems\/","title":{"rendered":"Hi\u1ec3u v\u1ec1 h\u1ed9p n\u1ed1i: C\u00e1c th\u00e0nh ph\u1ea7n thi\u1ebft y\u1ebfu cho h\u1ec7 th\u1ed1ng \u0111i\u1ec7n an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3"},"content":{"rendered":"
\n

I. Gi\u1edbi thi\u1ec7u<\/h2>\n

A. \u0110\u1ecbnh ngh\u0129a h\u1ed9p n\u1ed1i<\/h3>\n

H\u1ed9p n\u1ed1i l\u00e0 m\u1ed9t v\u1ecf b\u1ecdc \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ee9a c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n, cung c\u1ea5p m\u1ed9t c\u00e1ch an to\u00e0n v\u00e0 c\u00f3 t\u1ed5 ch\u1ee9c \u0111\u1ec3 k\u1ebft n\u1ed1i nhi\u1ec1u d\u00e2y v\u00e0 m\u1ea1ch \u0111i\u1ec7n. Nh\u1eefng h\u1ed9p n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u00e0m t\u1eeb nhi\u1ec1u v\u1eadt li\u1ec7u kh\u00e1c nhau, bao g\u1ed3m kim lo\u1ea1i v\u00e0 nh\u1ef1a, v\u00e0 r\u1ea5t quan tr\u1ecdng trong c\u1ea3 h\u1ec7 th\u1ed1ng \u0111i\u1ec7n d\u00e2n d\u1ee5ng v\u00e0 th\u01b0\u01a1ng m\u1ea1i. Ch\u00fang \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u0111i\u1ec3m k\u1ebft n\u1ed1i cho d\u00e2y \u0111i\u1ec7n, \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c m\u1ed1i n\u1ed1i \u0111i\u1ec7n \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 kh\u1ecfi h\u01b0 h\u1ecfng v\u00e0 c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 \u0111\u1ed9 \u1ea9m v\u00e0 t\u00e1c \u0111\u1ed9ng v\u1eadt l\u00fd.<\/p>\n

\"\"<\/p>\n

H\u1ed9p n\u1ed1i VIOX<\/a><\/p>\n

B. T\u1ea7m quan tr\u1ecdng trong h\u1ec7 th\u1ed1ng \u0111i\u1ec7n<\/h3>\n

H\u1ed9p n\u1ed1i l\u00e0 thi\u1ebft y\u1ebfu \u0111\u1ec3 b\u1ea3o v\u1ec7 s\u1ef1 an to\u00e0n v\u00e0 hi\u1ec7u qu\u1ea3 c\u1ee7a h\u1ec7 th\u1ed1ng \u0111i\u1ec7n v\u00ec ch\u00fang b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n kh\u1ecfi c\u00e1c m\u1ed1i \u0111e d\u1ecda b\u00ean ngo\u00e0i, tr\u00e1nh ti\u1ebfp x\u00fac v\u00f4 \u00fd v\u1edbi d\u00e2y \u0111i\u1ec7n \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 gi\u1ea3m kh\u1ea3 n\u0103ng x\u1ea3y ra ch\u00e1y \u0111i\u1ec7n ho\u1eb7c \u0111o\u1ea3n m\u1ea1ch. B\u1eb1ng c\u00e1ch cung c\u1ea5p m\u1ed9t m\u00f4i tr\u01b0\u1eddng an to\u00e0n cho c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n, h\u1ed9p n\u1ed1i gi\u00fap b\u1ea3o tr\u00ec v\u00e0 thay \u0111\u1ed5i h\u1ec7 th\u1ed1ng \u0111i\u1ec7n d\u1ec5 d\u00e0ng h\u01a1n m\u00e0 kh\u00f4ng g\u00e2y nguy hi\u1ec3m cho d\u00e2y \u0111i\u1ec7n.<\/p>\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a h\u1ed9p n\u1ed1i c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c t\u00f3m t\u1eaft nh\u01b0 sau:<\/p>\n

    \n
  • B\u1ea3o v\u1ec7: B\u1ea3o v\u1ec7 c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n kh\u1ecfi c\u00e1c y\u1ebfu t\u1ed1 th\u1eddi ti\u1ebft v\u00e0 h\u01b0 h\u1ecfng v\u1eadt l\u00fd, gi\u1ea3m nguy c\u01a1 x\u1ea3y ra c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 \u0111i\u1ec7n.<\/li>\n
  • T\u1ed5 ch\u1ee9c: H\u1ed9p n\u1ed1i gi\u00fap s\u1eafp x\u1ebfp c\u00e1c \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n, gi\u00fap qu\u1ea3n l\u00fd h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ph\u1ee9c t\u1ea1p d\u1ec5 d\u00e0ng h\u01a1n.<\/li>\n
  • Kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn: Ch\u00fang cung c\u1ea5p c\u00e1c \u0111i\u1ec3m d\u1ec5 ti\u1ebfp c\u1eadn \u0111\u1ec3 s\u1eeda ch\u1eefa ho\u1eb7c n\u00e2ng c\u1ea5p, cho ph\u00e9p th\u1ee3 \u0111i\u1ec7n l\u00e0m vi\u1ec7c an to\u00e0n tr\u00ean h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n m\u00e0 kh\u00f4ng c\u1ea7n ph\u1ea3i ti\u1ebfp c\u1eadn c\u00e1c khu v\u1ef1c \u1ea9n ho\u1eb7c kh\u00f3 ti\u1ebfp c\u1eadn.<\/li>\n<\/ul>\n

    II. C\u00e1c lo\u1ea1i h\u1ed9p n\u1ed1i<\/h2>\n

    H\u1ed9p n\u1ed1i \u0111\u01b0\u1ee3c chia th\u00e0nh c\u00e1c nh\u00f3m theo m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng, thi\u1ebft k\u1ebf v\u00e0 v\u1eadt li\u1ec7u c\u1ee5 th\u1ec3. Vi\u1ec7c l\u1ef1a ch\u1ecdn h\u1ed9p n\u1ed1i ph\u00f9 h\u1ee3p cho c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n kh\u00e1c nhau \u0111\u00f2i h\u1ecfi ph\u1ea3i hi\u1ec3u bi\u1ebft v\u1ec1 c\u00e1c lo\u1ea1i n\u00e0y.<\/p>\n

    A. H\u1ed9p n\u1ed1i kim lo\u1ea1i<\/h3>\n

    Th\u00f4ng th\u01b0\u1eddng, th\u00e9p ho\u1eb7c nh\u00f4m \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m h\u1ed9p n\u1ed1i kim lo\u1ea1i. Ch\u00fang c\u00f3 \u0111\u1ed9 b\u1ec1n v\u01b0\u1ee3t tr\u1ed9i v\u00e0 ho\u00e0n h\u1ea3o cho c\u00e1c t\u00ecnh hu\u1ed1ng nh\u01b0 m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p ho\u1eb7c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi, n\u01a1i c\u1ea7n c\u00f3 s\u1ef1 ch\u1eafc ch\u1eafn. Nh\u1eefng h\u1ed9p n\u00e0y ph\u00f9 h\u1ee3p v\u1edbi nh\u1eefng v\u1ecb tr\u00ed c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c h\u01b0 h\u1ecfng v\u1eadt l\u00fd ho\u1eb7c nguy c\u01a1 h\u1ecfa ho\u1ea1n v\u00ec ch\u00fang c\u00f3 th\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c nhi\u1ec7t \u0111\u1ed9 cao v\u00e0 t\u00e1c \u0111\u1ed9ng nghi\u00eam tr\u1ecdng.<\/p>\n

    \"Cast<\/p>\n

    B. H\u1ed9p n\u1ed1i phi kim lo\u1ea1i<\/h3>\n

    Do kh\u1ea3 n\u0103ng ch\u1ed1ng \u0103n m\u00f2n, h\u1ed9p n\u1ed1i kh\u00f4ng ph\u1ea3i kim lo\u1ea1i\u2014th\u01b0\u1eddng \u0111\u01b0\u1ee3c l\u00e0m b\u1eb1ng nh\u1ef1a PVC\u2014l\u00e0 l\u1ef1a ch\u1ecdn ph\u1ed5 bi\u1ebfn cho c\u00e1c \u1ee9ng d\u1ee5ng d\u00e2n d\u1ee5ng, ch\u1eb3ng h\u1ea1n nh\u01b0 b\u00ean trong t\u01b0\u1eddng ho\u1eb7c tr\u1ea7n nh\u00e0, v\u00e0 nh\u1eb9 v\u00e0 gi\u00e1 c\u1ea3 h\u1ee3p l\u00fd. Ch\u00fang ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c d\u00f9ng trong nh\u00e0, n\u01a1i ch\u00fang ti\u1ebfp x\u00fac v\u1edbi \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng kh\u1eafc nghi\u1ec7t \u1edf m\u1ee9c \u0111\u1ed9 h\u1ea1n ch\u1ebf.<\/p>\n

    C. H\u1ed9p n\u1ed1i ch\u1ed1ng ch\u1ecbu th\u1eddi ti\u1ebft<\/h3>\n

    \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang \u0111\u1ec3 b\u1ea3o v\u1ec7 c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n kh\u1ecfi c\u00e1c y\u1ebfu t\u1ed1 li\u00ean quan \u0111\u1ebfn th\u1eddi ti\u1ebft nh\u01b0 m\u01b0a, b\u1ee5i v\u00e0 nhi\u1ec7t \u0111\u1ed9 cao, h\u1ed9p n\u1ed1i ch\u1ed1ng th\u1ea5m n\u01b0\u1edbc \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c ng\u0103n ch\u1eb7n s\u1ef1 x\u00e2m nh\u1eadp c\u1ee7a h\u01a1i \u1ea9m v\u00e0 c\u00e1c r\u1ee7i ro li\u00ean quan, \u0111\u1ed3ng th\u1eddi \u0111\u1ea3m b\u1ea3o h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n lu\u00f4n kh\u00f4 r\u00e1o v\u00e0 an to\u00e0n trong m\u00f4i tr\u01b0\u1eddng ngo\u00e0i tr\u1eddi, nh\u01b0 \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi ho\u1eb7c h\u1ec7 th\u1ed1ng chi\u1ebfu s\u00e1ng.<\/p>\n

    D. H\u1ed9p n\u1ed1i ch\u1ed1ng ch\u00e1y n\u1ed5<\/h3>\n

    \u0110\u1ec3 ng\u0103n ch\u1eb7n kh\u00ed quy\u1ec3n b\u00ean ngo\u00e0i b\u1eaft l\u1eeda, h\u1ed9p n\u1ed1i ch\u1ed1ng n\u1ed5 \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u1eef l\u1ea1i b\u1ea5t k\u1ef3 kh\u00ed ho\u1eb7c h\u01a1i n\u1ed5 n\u00e0o c\u00f3 th\u1ec3 ph\u00e1t sinh b\u00ean trong v\u1ecf h\u1ed9p. Nh\u1eefng h\u1ed9p n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft trong c\u00e1c m\u00f4i tr\u01b0\u1eddng nguy hi\u1ec3m c\u00f3 h\u1ee3p ch\u1ea5t d\u1ec5 ch\u00e1y, bao g\u1ed3m c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p h\u00f3a ch\u1ea5t ho\u1eb7c nh\u00e0 m\u00e1y l\u1ecdc d\u1ea7u. B\u1eb1ng c\u00e1ch b\u1ea3o to\u00e0n t\u00ednh to\u00e0n v\u1eb9n c\u1ee7a c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n trong m\u00f4i tr\u01b0\u1eddng c\u00f3 kh\u1ea3 n\u0103ng g\u00e2y n\u1ed5, ch\u00fang \u0111\u1ea3m b\u1ea3o an to\u00e0n.<\/p>\n

    III. C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ed9p n\u1ed1i<\/h2>\n

    H\u1ed9p n\u1ed1i \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb m\u1ed9t s\u1ed1 b\u1ed9 ph\u1eadn quan tr\u1ecdng h\u1ee3p t\u00e1c v\u1edbi nhau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o x\u1eed l\u00fd hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n. \u0110i\u1ec1u c\u1ea7n thi\u1ebft l\u00e0 ph\u1ea3i hi\u1ec3u c\u00e1c y\u1ebfu t\u1ed1 n\u00e0y \u0111\u1ec3 th\u1ef1c hi\u1ec7n l\u1eafp \u0111\u1eb7t v\u00e0 b\u1ea3o tr\u00ec \u0111\u00fang c\u00e1ch.<\/p>\n

    \"Components-of-a-Junction-Box\"<\/h3>\n

    A. V\u1ecf h\u1ed9p<\/h3>\n

    Th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ee7a h\u1ed9p n\u1ed1i l\u00e0 v\u1ecf h\u1ed9p, \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ch\u1ee9a v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n. Th\u01b0\u1eddng \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o b\u1eb1ng c\u00e1c v\u1eadt li\u1ec7u nh\u01b0 nh\u1ef1a ho\u1eb7c kim lo\u1ea1i, v\u1ecf h\u1ed9p tr\u00e1nh ti\u1ebfp x\u00fac ng\u1eabu nhi\u00ean v\u1edbi d\u00e2y \u0111i\u1ec7n \u0111ang ho\u1ea1t \u0111\u1ed9ng v\u00e0 b\u1ea3o v\u1ec7 c\u00e1c th\u00e0nh ph\u1ea7n b\u00ean trong kh\u1ecfi h\u01b0 h\u1ecfng v\u1eadt l\u00fd, b\u1ee5i v\u00e0 \u0111\u1ed9 \u1ea9m.<\/p>\n

    B. T\u1ea5m che<\/h3>\n

    T\u1ea5m che, l\u00e0 n\u1eafp b\u1ea3o v\u1ec7 cho h\u1ed9p n\u1ed1i, gi\u1eef ch\u1eb7t v\u1ecf h\u1ed9p v\u00e0 gi\u1eef cho h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n b\u00ean trong kh\u00f4ng ch\u1ea1m t\u1edbi \u0111\u01b0\u1ee3c. \u0110\u00e2y l\u00e0 th\u00e0nh ph\u1ea7n an to\u00e0n quan tr\u1ecdng v\u00ec n\u00f3 l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng v\u00f4 t\u00ecnh ti\u1ebfp x\u00fac v\u1edbi c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n. T\u1ea5m che c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c v\u1eb7n v\u00edt ho\u1eb7c l\u1eafp kh\u00f3a, v\u00e0 ch\u00fang c\u00f3 th\u1ec3 c\u00f3 c\u00e1c t\u00ednh n\u0103ng ng\u0103n h\u01a1i \u1ea9m ho\u1eb7c b\u1ee5i x\u00e2m nh\u1eadp.<\/p>\n

    C. Lo\u1ea1i tr\u1ef1c ti\u1ebfp<\/h3>\n

    Knockouts l\u00e0 c\u00e1c l\u1ed7 h\u1ed9p n\u1ed1i \u0111\u01b0\u1ee3c \u0111\u00e1nh d\u1ea5u s\u1eb5n gi\u00fap d\u1ec5 d\u00e0ng l\u1eafp c\u00e1p. \u0110\u1ec3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c m\u1ea1ch kh\u00e1c nhau, c\u00e1c l\u1ed7 n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c lo\u1ea1i b\u1ecf \u0111\u1ec3 t\u1ea1o ch\u1ed7 cho \u1ed1ng d\u1eabn \u0111i\u1ec7n ho\u1eb7c d\u00e2y \u0111i\u1ec7n \u0111i v\u00e0o h\u1ed9p. V\u00ec knockouts cung c\u1ea5p t\u00ednh linh ho\u1ea1t khi l\u1eafp \u0111\u1eb7t, th\u1ee3 \u0111i\u1ec7n c\u00f3 th\u1ec3 s\u1eeda \u0111\u1ed5i h\u1ed9p \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u v\u1ec1 d\u00e2y c\u1ee5 th\u1ec3.<\/p>\n

    D. Gi\u00e1 \u0111\u1ee1 l\u1eafp<\/h3>\n

    T\u00f9y thu\u1ed9c v\u00e0o thi\u1ebft k\u1ebf h\u1ed9p n\u1ed1i v\u00e0 y\u00eau c\u1ea7u l\u1eafp \u0111\u1eb7t, gi\u00e1 \u0111\u1ee1 - b\u1ed9 ph\u1eadn ph\u1ea7n c\u1ee9ng d\u00f9ng \u0111\u1ec3 c\u1ed1 \u0111\u1ecbnh h\u1ed9p v\u00e0o t\u01b0\u1eddng, tr\u1ea7n nh\u00e0 ho\u1eb7c c\u00e1c b\u1ec1 m\u1eb7t kh\u00e1c - c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh ho\u1eb7c \u0111i\u1ec1u ch\u1ec9nh, \u0111\u1ea3m b\u1ea3o h\u1ed9p lu\u00f4n \u1ed5n \u0111\u1ecbnh v\u00e0 \u0111\u01b0\u1ee3c \u0111\u1ecbnh v\u1ecb ch\u00ednh x\u00e1c trong qu\u00e1 tr\u00ecnh l\u1eafp \u0111\u1eb7t v\u00e0 s\u1eed d\u1ee5ng.<\/p>\n

    E. V\u00edt ti\u1ebfp \u0111\u1ecba<\/h3>\n

    C\u00e1c v\u00edt kim lo\u1ea1i \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u201cv\u00edt ti\u1ebfp \u0111\u1ecba\u201d \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y b\u00ean trong h\u1ed9p n\u1ed1i v\u00e0 \u0111\u00f3ng vai tr\u00f2 l\u00e0 \u0111i\u1ec3m k\u1ebft n\u1ed1i cho d\u00e2y ti\u1ebfp \u0111\u1ecba. B\u1eb1ng c\u00e1ch d\u1eabn \u0111i\u1ec7n d\u01b0 th\u1eeba \u0111\u00fang c\u00e1ch xu\u1ed1ng \u0111\u1ea5t, vi\u1ec7c ti\u1ebfp \u0111\u1ecba \u0111\u00fang c\u00e1ch s\u1ebd l\u00e0m gi\u1ea3m kh\u1ea3 n\u0103ng x\u1ea3y ra nguy c\u01a1 h\u1ecfa ho\u1ea1n v\u00e0 gi\u00fap ng\u0103n ng\u1eeba \u0111i\u1ec7n gi\u1eadt, khi\u1ebfn n\u00f3 tr\u1edf n\u00ean c\u1ea7n thi\u1ebft cho an to\u00e0n \u0111i\u1ec7n. C\u00e1c v\u00edt ti\u1ebfp \u0111\u1ecba \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c b\u1ed9 ph\u1eadn kim lo\u1ea1i c\u1ee7a h\u1ed9p n\u1ed1i lu\u00f4n \u1edf \u0111i\u1ec7n th\u1ebf ti\u1ebfp \u0111\u1ecba.<\/p>\n

    IV. \u1ee8ng d\u1ee5ng c\u1ee7a h\u1ed9p n\u1ed1i<\/h2>\n

    H\u1ed9p n\u1ed1i l\u00e0 c\u00e1c b\u1ed9 ph\u1eadn c\u00f3 th\u1ec3 th\u00edch \u1ee9ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u b\u1ed1i c\u1ea3nh kh\u00e1c nhau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o k\u1ebft n\u1ed1i \u0111i\u1ec7n an to\u00e0n v\u00e0 \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c t\u1ed1t. C\u00e1c lo\u1ea1i chung m\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh d\u00e2n d\u1ee5ng, th\u01b0\u01a1ng m\u1ea1i, c\u00f4ng nghi\u1ec7p v\u00e0 ngo\u00e0i tr\u1eddi.<\/p>\n

    A. S\u1eed d\u1ee5ng d\u00e2n d\u1ee5ng<\/h3>\n

    H\u1ed9p n\u1ed1i r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 k\u1ebft n\u1ed1i d\u00e2y \u0111i\u1ec7n trong m\u00f4i tr\u01b0\u1eddng d\u00e2n d\u1ee5ng; ch\u00fang th\u01b0\u1eddng \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf nh\u1eefng n\u01a1i nh\u01b0 t\u01b0\u1eddng, g\u00e1c x\u00e9p v\u00e0 t\u1ea7ng h\u1ea7m \u0111\u1ec3 k\u1ebft n\u1ed1i \u1ed5 c\u1eafm, c\u00f4ng t\u1eafc v\u00e0 \u0111\u1ed3 \u0111\u1ea1c. B\u1eb1ng c\u00e1ch ch\u1ee9a nhi\u1ec1u k\u1ebft n\u1ed1i d\u00e2y, h\u1ed9p n\u1ed1i gi\u00fap gi\u1eef cho h\u1ec7 th\u1ed1ng \u0111i\u1ec7n g\u1ecdn g\u00e0ng v\u00e0 ng\u0103n n\u1eafp, gi\u1ea3m nguy c\u01a1 x\u1ea3y ra c\u00e1c m\u1ed1i nguy hi\u1ec3m nh\u01b0 ch\u00e1y \u0111i\u1ec7n ho\u1eb7c ch\u1eadp m\u1ea1ch. Vi\u1ec7c s\u1eed d\u1ee5ng ch\u00fang c\u0169ng gi\u00fap b\u1ea3o tr\u00ec v\u00e0 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 d\u1ec5 d\u00e0ng h\u01a1n, khi\u1ebfn ch\u00fang tr\u1edf n\u00ean kh\u00f4ng th\u1ec3 thi\u1ebfu trong h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n gia \u0111\u00ecnh.<\/p>\n

    B. \u1ee8ng d\u1ee5ng th\u01b0\u01a1ng m\u1ea1i<\/h3>\n

    Trong c\u00e1c b\u1ed1i c\u1ea3nh th\u01b0\u01a1ng m\u1ea1i, n\u01a1i h\u1ecd gi\u00e1m s\u00e1t c\u00e1c m\u1ea1ng l\u01b0\u1edbi \u0111i\u1ec7n ph\u1ee9c t\u1ea1p trong c\u00e1c t\u00f2a nh\u00e0 c\u00f4ng c\u1ed9ng, c\u01a1 s\u1edf b\u00e1n l\u1ebb v\u00e0 t\u00f2a nh\u00e0 v\u0103n ph\u00f2ng, h\u1ed9p n\u1ed1i l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. Ch\u00fang cung c\u1ea5p c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n t\u1ea1i m\u1ed9t v\u1ecb tr\u00ed duy nh\u1ea5t, gi\u00fap vi\u1ec7c b\u1ea3o tr\u00ec v\u00e0 \u0111i\u1ec1u ch\u1ec9nh tr\u1edf n\u00ean \u0111\u01a1n gi\u1ea3n h\u01a1n. H\u1ed9p n\u1ed1i \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c b\u1ed1i c\u1ea3nh th\u01b0\u01a1ng m\u1ea1i \u0111\u1ec3 h\u1ed7 tr\u1ee3 duy tr\u00ec c\u01a1 s\u1edf h\u1ea1 t\u1ea7ng \u0111i\u1ec7n c\u00f3 tr\u1eadt t\u1ef1 v\u00e0 hi\u1ec7u qu\u1ea3, \u0111i\u1ec1u n\u00e0y r\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 x\u1eed l\u00fd nhu c\u1ea7u \u0111i\u1ec7n l\u1edbn v\u00e0 cho ph\u00e9p gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 nhanh ch\u00f3ng.<\/p>\n

    C. M\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p<\/h3>\n

    \u0110\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c c\u00e1c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t nh\u01b0 b\u1ee5i, \u0111\u1ed9 \u1ea9m v\u00e0 nhi\u1ec7t \u0111\u1ed9 kh\u1eafc nghi\u1ec7t, h\u1ed9p n\u1ed1i c\u00f4ng nghi\u1ec7p l\u00e0 thi\u1ebft b\u1ecb c\u1ea7n thi\u1ebft \u0111\u1ec3 k\u1ebft n\u1ed1i m\u00e1y m\u00f3c v\u00e0 thi\u1ebft b\u1ecb h\u1ea1ng n\u1eb7ng trong m\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p. C\u1ea5u tr\u00fac ch\u1eafc ch\u1eafn c\u1ee7a ch\u00fang \u0111\u1ea3m b\u1ea3o ph\u00e2n ph\u1ed1i \u0111i\u1ec7n \u0111\u00e1ng tin c\u1eady \u0111\u1ed3ng th\u1eddi t\u0103ng c\u01b0\u1eddng an to\u00e0n b\u1eb1ng c\u00e1ch b\u1ea3o v\u1ec7 ch\u1ed1ng l\u1ea1i c\u00e1c m\u1ed1i nguy hi\u1ec3m v\u1ec1 m\u00f4i tr\u01b0\u1eddng. Kh\u1ea3 n\u0103ng qu\u1ea3n l\u00fd c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n ph\u1ee9c t\u1ea1p c\u1ee7a ch\u00fang r\u1ea5t quan tr\u1ecdng trong c\u00e1c ng\u00e0nh c\u00f4ng nghi\u1ec7p m\u00e0 th\u1eddi gian ng\u1eebng ho\u1ea1t \u0111\u1ed9ng c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn m\u1ea5t n\u0103ng su\u1ea5t \u0111\u00e1ng k\u1ec3.<\/p>\n

    D. L\u1eafp \u0111\u1eb7t ngo\u00e0i tr\u1eddi<\/h3>\n

    M\u1ee5c \u0111\u00edch c\u1ee7a h\u1ed9p n\u1ed1i ngo\u00e0i tr\u1eddi l\u00e0 b\u1ea3o v\u1ec7 c\u00e1c k\u1ebft n\u1ed1i \u0111i\u1ec7n kh\u1ecfi c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 m\u01b0a, b\u1ee5i v\u00e0 thay \u0111\u1ed5i nhi\u1ec7t \u0111\u1ed9. Nh\u1eefng h\u1ed9p ch\u1ed1ng ch\u1ecbu th\u1eddi ti\u1ebft n\u00e0y r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng nh\u01b0 chi\u1ebfu s\u00e1ng c\u1ea3nh quan, \u1ed5 c\u1eafm ngo\u00e0i tr\u1eddi v\u00e0 \u0111\u1ed3 \u0111\u1ea1c chi\u1ebfu s\u00e1ng ngo\u00e0i tr\u1eddi v\u00ec ch\u00fang gi\u1eef cho h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n kh\u00f4 r\u00e1o v\u00e0 an to\u00e0n, tr\u00e1nh c\u00e1c r\u1ee7i ro ti\u1ec1m \u1ea9n do \u0111\u1ed9 \u1ea9m ho\u1eb7c m\u1ea3nh v\u1ee5n x\u00e2m nh\u1eadp. Ngo\u00e0i ra, h\u1ed9p n\u1ed1i ngo\u00e0i tr\u1eddi th\u01b0\u1eddng c\u00f3 c\u01a1 ch\u1ebf kh\u00f3a v\u00e0 v\u1eadt li\u1ec7u ch\u1eafc ch\u1eafn \u0111\u1ec3 ng\u0103n ch\u1eb7n h\u00e0nh vi ph\u00e1 ho\u1ea1i v\u00e0 \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 tin c\u1eady l\u00e2u d\u00e0i.<\/p>\n

    V. L\u1ef1a ch\u1ecdn h\u1ed9p n\u1ed1i ph\u00f9 h\u1ee3p<\/h2>\n

    Vi\u1ec7c l\u1ef1a ch\u1ecdn h\u1ed9p n\u1ed1i ph\u00f9 h\u1ee3p l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n, tu\u00e2n th\u1ee7 v\u00e0 ch\u1ee9c n\u0103ng trong c\u00e1c h\u1ec7 th\u1ed1ng \u0111i\u1ec7n. Sau \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e2n nh\u1eafc ch\u00ednh khi l\u1ef1a ch\u1ecdn h\u1ed9p n\u1ed1i:<\/p>\n

    A. Xem x\u00e9t m\u00f4i tr\u01b0\u1eddng<\/h3>\n

    M\u00f4i tr\u01b0\u1eddng n\u01a1i h\u1ed9p n\u1ed1i s\u1ebd \u0111\u01b0\u1ee3c l\u1eafp \u0111\u1eb7t \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u v\u00e0 thi\u1ebft k\u1ebf. V\u00ed d\u1ee5:<\/p>\n

      \n
    • M\u00f4i tr\u01b0\u1eddng trong nh\u00e0 c\u00f3 th\u1ec3 cho ph\u00e9p s\u1eed d\u1ee5ng h\u1ed9p kh\u00f4ng l\u00e0m b\u1eb1ng kim lo\u1ea1i, nh\u1eb9 v\u00e0 ch\u1ed1ng \u0103n m\u00f2n.<\/li>\n
    • C\u00e1c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi c\u1ea7n c\u00f3 h\u1ed9p ch\u1ed1ng ch\u1ecbu th\u1eddi ti\u1ebft \u0111\u1ec3 b\u1ea3o v\u1ec7 kh\u1ecfi \u0111\u1ed9 \u1ea9m v\u00e0 tia UV.<\/li>\n
    • M\u00f4i tr\u01b0\u1eddng c\u00f4ng nghi\u1ec7p c\u00f3 th\u1ec3 c\u1ea7n \u0111\u1ebfn h\u1ed9p kim lo\u1ea1i ho\u1eb7c h\u1ed9p ch\u1ed1ng ch\u00e1y n\u1ed5 \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c \u0111i\u1ec1u ki\u1ec7n kh\u1eafc nghi\u1ec7t v\u00e0 ng\u0103n ng\u1eeba nguy hi\u1ec3m.<\/li>\n<\/ul>\n

      B. Y\u00eau c\u1ea7u v\u1ec1 k\u00edch th\u01b0\u1edbc v\u00e0 c\u00f4ng su\u1ea5t<\/h3>\n

      K\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi s\u1ed1 l\u01b0\u1ee3ng v\u00e0 k\u00edch th\u01b0\u1edbc c\u1ee7a d\u00e2y d\u1eabn, c\u0169ng nh\u01b0 b\u1ea5t k\u1ef3 thi\u1ebft b\u1ecb ho\u1eb7c ph\u1ee5 ki\u1ec7n n\u00e0o trong h\u1ed9p. B\u1ed9 lu\u1eadt \u0110i\u1ec7n qu\u1ed1c gia (NEC) cung c\u1ea5p h\u01b0\u1edbng d\u1eabn \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh th\u1ec3 t\u00edch t\u1ed1i thi\u1ec3u c\u1ea7n thi\u1ebft d\u1ef1a tr\u00ean:<\/p>\n

        \n
      • S\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn.<\/li>\n
      • K\u00edch th\u01b0\u1edbc c\u1ee7a d\u00e2y d\u1eabn (v\u00ed d\u1ee5: 18 AWG \u0111\u1ebfn 4 AWG ho\u1eb7c l\u1edbn h\u01a1n).<\/li>\n
      • Kho\u1ea3n tr\u1ee3 c\u1ea5p b\u1ed5 sung cho c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 c\u00f4ng t\u1eafc ho\u1eb7c \u1ed5 c\u1eafm.<\/li>\n<\/ul>\n

        Kh\u00f4ng ch\u1ecdn h\u1ed9p c\u00f3 k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn qu\u00e1 nhi\u1ec7t, h\u1ecfng l\u1edbp c\u00e1ch \u0111i\u1ec7n ho\u1eb7c t\u0103ng nguy c\u01a1 ch\u00e1y \u0111i\u1ec7n.<\/p>\n

        C. L\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u<\/h3>\n

        Vi\u1ec7c l\u1ef1a ch\u1ecdn v\u1eadt li\u1ec7u \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn \u0111\u1ed9 b\u1ec1n, \u0111\u1ed9 an to\u00e0n v\u00e0 kh\u1ea3 n\u0103ng tu\u00e2n th\u1ee7:<\/p>\n

          \n
        • H\u1ed9p n\u1ed1i b\u1eb1ng kim lo\u1ea1i (v\u00ed d\u1ee5: th\u00e9p ho\u1eb7c nh\u00f4m) c\u00f3 \u0111\u1ed9 b\u1ec1n cao v\u00e0 ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng c\u00f3 y\u00eau c\u1ea7u v\u1eadt l\u00fd cao.<\/li>\n
        • C\u00e1c h\u1ed9p kh\u00f4ng ph\u1ea3i kim lo\u1ea1i (v\u00ed d\u1ee5: PVC) l\u00fd t\u01b0\u1edfng \u0111\u1ec3 s\u1eed d\u1ee5ng trong nh\u00e0, n\u01a1i c\u00f3 \u0111\u1ed9 \u1ea9m t\u1ed1i thi\u1ec3u.<\/li>\n
        • \u0110\u1ea3m b\u1ea3o v\u1eadt li\u1ec7u c\u00f3 kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu c\u00e1c y\u1ebfu t\u1ed1 m\u00f4i tr\u01b0\u1eddng nh\u01b0 \u0111\u1ed9 \u1ea9m, tia UV v\u00e0 \u0103n m\u00f2n, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng ngo\u00e0i tr\u1eddi ho\u1eb7c c\u00f4ng nghi\u1ec7p.<\/li>\n<\/ul>\n

          D. Tu\u00e2n th\u1ee7 c\u00e1c Quy \u0111\u1ecbnh v\u1ec1 \u0110i\u1ec7n<\/h3>\n

          Vi\u1ec7c tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 \u0111i\u1ec7n t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng l\u00e0 b\u1eaft bu\u1ed9c khi l\u1ef1a ch\u1ecdn h\u1ed9p n\u1ed1i. NEC n\u00eau r\u00f5 c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 li\u00ean quan \u0111\u1ebfn:<\/p>\n

            \n
          • K\u00edch th\u01b0\u1edbc h\u1ed9p t\u1ed1i thi\u1ec3u d\u1ef1a tr\u00ean lo\u1ea1i d\u00e2y d\u1eabn v\u00e0 s\u1ed1 l\u01b0\u1ee3ng d\u00e2y d\u1eabn.<\/li>\n
          • Th\u1ef1c h\u00e0nh l\u1eafp \u0111\u1eb7t \u0111\u1ea3m b\u1ea3o kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn \u0111\u1ec3 b\u1ea3o tr\u00ec.<\/li>\n
          • Y\u00eau c\u1ea7u v\u1ec1 n\u1ed1i \u0111\u1ea5t \u0111\u1ec3 ng\u0103n ng\u1eeba t\u00edch t\u1ee5 t\u0129nh \u0111i\u1ec7n \u1edf nh\u1eefng v\u1ecb tr\u00ed nguy hi\u1ec3m.<\/li>\n<\/ul>\n

            Vi\u1ec7c l\u1ef1a ch\u1ecdn h\u1ed9p n\u1ed1i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh n\u00e0y kh\u00f4ng ch\u1ec9 t\u0103ng c\u01b0\u1eddng an to\u00e0n m\u00e0 c\u00f2n \u0111\u1ea3m b\u1ea3o vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u01b0\u1ee3t qua c\u00e1c cu\u1ed9c ki\u1ec3m tra.<\/p>\n

            VI. Quy tr\u00ecnh l\u1eafp \u0111\u1eb7t<\/h2>\n

            Vi\u1ec7c l\u1eafp \u0111\u1eb7t h\u1ed9p n\u1ed1i bao g\u1ed3m m\u1ed9t s\u1ed1 b\u01b0\u1edbc quan tr\u1ecdng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 tu\u00e2n th\u1ee7 c\u00e1c ti\u00eau chu\u1ea9n \u0111i\u1ec7n. Sau \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn chi ti\u1ebft v\u1ec1 quy tr\u00ecnh l\u1eafp \u0111\u1eb7t:<\/p>\n

            A. L\u00ean k\u1ebf ho\u1ea1ch v\u00e0 chu\u1ea9n b\u1ecb<\/h3>\n
              \n
            1. Bi\u1ec7n ph\u00e1p ph\u00f2ng ng\u1eeba an to\u00e0n: Tr\u01b0\u1edbc khi b\u1eaft \u0111\u1ea7u, h\u00e3y t\u1eaft ngu\u1ed3n \u0111i\u1ec7n \u1edf b\u1ea3ng c\u1ea7u dao ch\u00ednh c\u1ee7a m\u1ea1ch \u0111i\u1ec7n m\u00e0 b\u1ea1n s\u1ebd l\u00e0m vi\u1ec7c. S\u1eed d\u1ee5ng v\u00f4n k\u1ebf ho\u1eb7c m\u00e1y ki\u1ec3m tra kh\u00f4ng ti\u1ebfp x\u00fac \u0111\u1ec3 x\u00e1c nh\u1eadn r\u1eb1ng ngu\u1ed3n \u0111i\u1ec7n \u0111\u00e3 t\u1eaft.<\/li>\n
            2. Thu th\u1eadp c\u00f4ng c\u1ee5 v\u00e0 v\u1eadt li\u1ec7u: Thu th\u1eadp t\u1ea5t c\u1ea3 c\u00e1c c\u00f4ng c\u1ee5 v\u00e0 v\u1eadt li\u1ec7u c\u1ea7n thi\u1ebft, bao g\u1ed3m:\n
                \n
              • H\u1ed9p n\u1ed1i \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a (kim lo\u1ea1i ho\u1eb7c nh\u1ef1a)<\/li>\n
              • K\u1eb9p c\u00e1p (cho h\u1ed9p kim lo\u1ea1i)<\/li>\n
              • \u0110ai \u1ed1c d\u00e2y<\/li>\n
              • V\u00edt ho\u1eb7c \u0111inh \u0111\u1ec3 g\u1eafn<\/li>\n
              • B\u0103ng \u0111i\u1ec7n<\/li>\n
              • K\u00ecm tu\u1ed1t d\u00e2y v\u00e0 tua v\u00edt<\/li>\n<\/ul>\n<\/li>\n
              • Ch\u1ecdn v\u1ecb tr\u00ed: Ch\u1ecdn v\u1ecb tr\u00ed d\u1ec5 ti\u1ebfp c\u1eadn cho h\u1ed9p n\u1ed1i tu\u00e2n th\u1ee7 c\u00e1c quy \u0111\u1ecbnh v\u1ec1 \u0111i\u1ec7n t\u1ea1i \u0111\u1ecba ph\u01b0\u01a1ng. \u0110\u1ea3m b\u1ea3o h\u1ed9p \u0111\u01b0\u1ee3c l\u1eafp ch\u1eafc ch\u1eafn v\u00e0o \u0111inh ho\u1eb7c d\u1ea7m, m\u1eb7t h\u1ed9p ti\u1ebfp x\u00fac v\u1edbi b\u1ec1 m\u1eb7t t\u01b0\u1eddng.<\/li>\n<\/ol>\n

                B. L\u1eafp h\u1ed9p<\/h3>\n
                  \n
                1. G\u1eafn v\u00e0o k\u1ebft c\u1ea5u: C\u1ed1 \u0111\u1ecbnh h\u1ed9p n\u1ed1i v\u00e0o \u0111inh ho\u1eb7c d\u1ea7m b\u1eb1ng v\u00edt qua c\u00e1c l\u1ed7 c\u00f3 s\u1eb5n tr\u00ean h\u1ed9p, \u0111\u1ea3m b\u1ea3o h\u1ed9p \u1ed5n \u0111\u1ecbnh v\u00e0 ph\u1eb3ng v\u1edbi b\u1ec1 m\u1eb7t t\u01b0\u1eddng.<\/li>\n
                2. L\u1eafp k\u1eb9p: \u0110\u1ed1i v\u1edbi h\u1ed9p kim lo\u1ea1i, th\u00e1o ch\u1ed1t b\u1eb1ng tua v\u00edt ho\u1eb7c b\u00faa, sau \u0111\u00f3 l\u1eafp k\u1eb9p c\u00e1p cho m\u1ed7i \u0111i\u1ec3m v\u00e0o. \u0110\u1ed1i v\u1edbi h\u1ed9p nh\u1ef1a, s\u1eed d\u1ee5ng k\u1eb9p b\u00ean trong c\u00f3 s\u1eb5n trong h\u1ed9p.<\/li>\n<\/ol>\n

                  C. K\u1ebft n\u1ed1i d\u00e2y \u0111i\u1ec7n<\/h3>\n
                    \n
                  1. Chu\u1ea9n b\u1ecb d\u00e2y: T\u01b0\u1edbc kho\u1ea3ng 3\/4 inch l\u1edbp c\u00e1ch \u0111i\u1ec7n kh\u1ecfi m\u1ed7i d\u00e2y b\u1eb1ng k\u00ecm tu\u1ed1t d\u00e2y. \u0110\u1ea3m b\u1ea3o m\u1ed7i d\u00e2y d\u1eabn k\u00e9o d\u00e0i kho\u1ea3ng 6 inch v\u00e0o h\u1ed9p.<\/li>\n
                  2. K\u1ebft n\u1ed1i d\u00e2y n\u1ed1i \u0111\u1ea5t: \u0110\u1ea7u ti\u00ean, n\u1ed1i d\u00e2y n\u1ed1i \u0111\u1ea5t b\u1eb1ng \u0111\u1ed3ng tr\u1ea7n ho\u1eb7c d\u00e2y n\u1ed1i \u0111\u1ea5t c\u00e1ch \u0111i\u1ec7n m\u00e0u xanh l\u00e1 c\u00e2y b\u1eb1ng c\u00e1ch xo\u1eafn ch\u00fang l\u1ea1i v\u1edbi nhau v\u00e0 c\u1ed1 \u0111\u1ecbnh ch\u00fang b\u1eb1ng \u0111ai \u1ed1c d\u00e2y. N\u1ebfu s\u1eed d\u1ee5ng h\u1ed9p kim lo\u1ea1i, h\u00e3y k\u1ebft n\u1ed1i d\u00e2y n\u1ed1i \u0111\u1ea5t \u0111u\u00f4i l\u1ee3n v\u1edbi v\u00edt n\u1ed1i \u0111\u1ea5t b\u00ean trong h\u1ed9p.<\/li>\n
                  3. N\u1ed1i d\u00e2y n\u00f3ng v\u00e0 d\u00e2y trung t\u00ednh: N\u1ed1i d\u00e2y \u0111en (n\u00f3ng) v\u1edbi nhau v\u00e0 d\u00e2y tr\u1eafng (trung t\u00ednh) v\u1edbi nhau b\u1eb1ng \u0111ai \u1ed1c d\u00e2y \u0111\u1ec3 k\u1ebft n\u1ed1i ch\u1eafc ch\u1eafn.<\/li>\n
                  4. C\u1ed1 \u0111\u1ecbnh c\u00e1p: Si\u1ebft ch\u1eb7t k\u1eb9p c\u00e1p \u0111\u1ec3 gi\u1eef ch\u1eb7t d\u00e2y m\u00e0 kh\u00f4ng c\u1ea7n si\u1ebft qu\u00e1 ch\u1eb7t v\u00ec c\u00f3 th\u1ec3 l\u00e0m h\u1ecfng c\u00e1p.<\/li>\n<\/ol>\n

                    D. Ni\u00eam phong v\u00e0 ho\u00e0n thi\u1ec7n<\/h3>\n
                      \n
                    1. \u0110\u1eady h\u1ed9p n\u1ed1i: Sau khi th\u1ef1c hi\u1ec7n xong t\u1ea5t c\u1ea3 c\u00e1c k\u1ebft n\u1ed1i, h\u00e3y g\u1eafn ch\u1eb7t t\u1ea5m n\u1eafp \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng d\u00e2y \u0111i\u1ec7n b\u00ean trong kh\u1ecfi b\u1ee5i v\u00e0 h\u01a1i \u1ea9m.<\/li>\n
                    2. Ki\u1ec3m tra cu\u1ed1i c\u00f9ng: \u0110\u1ea3m b\u1ea3o m\u1ecdi k\u1ebft n\u1ed1i \u0111\u1ec1u ch\u1eb7t ch\u1ebd v\u00e0 kh\u00f4ng c\u00f3 d\u00e2y n\u00e0o l\u1ed9 ra ngo\u00e0i h\u1ed9p n\u1ed1i.<\/li>\n
                    3. Kh\u00f4i ph\u1ee5c ngu\u1ed3n \u0111i\u1ec7n: B\u1eadt ngu\u1ed3n t\u1ea1i c\u1ea7u dao \u0111i\u1ec7n v\u00e0 ki\u1ec3m tra c\u00e1c k\u1ebft n\u1ed1i \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o m\u1ecdi th\u1ee9 ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng.<\/li>\n<\/ol>\n

                      VII. C\u00e2n nh\u1eafc v\u1ec1 an to\u00e0n<\/h2>\n
                        \n
                      1. N\u1ec1n t\u1ea3ng\n
                          \n
                        • H\u1ed9p kim lo\u1ea1i: N\u1ed1i \u0111\u1ea5t b\u1eb1ng v\u00edt ho\u1eb7c ph\u01b0\u01a1ng ph\u00e1p \u0111\u01b0\u1ee3c ch\u1ea5p thu\u1eadn<\/li>\n
                        • H\u1ed9p kh\u00f4ng ph\u1ea3i kim lo\u1ea1i: S\u1eed d\u1ee5ng k\u1eb9p n\u1ed1i \u0111\u1ea5t \u0111\u01b0\u1ee3c ch\u1ea5p thu\u1eadn<\/li>\n
                        • \u0110\u1ea3m b\u1ea3o d\u00e2y n\u1ed1i \u0111\u1ea5t li\u00ean t\u1ee5c, kh\u00f4ng b\u1ecb \u0111\u1ee9t<\/li>\n<\/ul>\n<\/li>\n
                        • B\u1ea3o V\u1ec7 Qu\u00e1 D\u00f2ng\n
                            \n
                          • K\u1ebft n\u1ed1i v\u1edbi c\u1ea7u dao ho\u1eb7c c\u1ea7u ch\u00ec \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 ph\u00f9 h\u1ee3p<\/li>\n
                          • Theo d\u00f5i c\u00e1c d\u1ea5u hi\u1ec7u qu\u00e1 t\u1ea3i (h\u1ed9p n\u00f3ng, \u0111\u00e8n nh\u1ea5p nh\u00e1y)<\/li>\n<\/ul>\n<\/li>\n
                          • Kh\u1ea3 n\u0103ng ti\u1ebfp c\u1eadn\n
                              \n
                            • L\u1eafp \u0111\u1eb7t \u1edf nh\u1eefng v\u1ecb tr\u00ed d\u1ec5 ti\u1ebfp c\u1eadn<\/li>\n
                            • Duy tr\u00ec kh\u00f4ng gian l\u00e0m vi\u1ec7c t\u1ed1i thi\u1ec3u (r\u1ed9ng 30\u2033 x s\u00e2u 36\u2033)<\/li>\n<\/ul>\n<\/li>\n
                            • An to\u00e0n ph\u00f2ng ch\u00e1y ch\u1eefa ch\u00e1y\n
                                \n
                              • S\u1eed d\u1ee5ng v\u1eadt li\u1ec7u kh\u00f4ng ch\u00e1y ph\u00f9 h\u1ee3p v\u1edbi m\u00f4i tr\u01b0\u1eddng<\/li>\n
                              • Th\u1ef1c hi\u1ec7n ch\u1ed1ng ch\u00e1y cho c\u00e1c m\u1ea1ch quan tr\u1ecdng<\/li>\n
                              • C\u1ed1 \u0111\u1ecbnh ch\u1eb7t n\u1eafp h\u1ed9p n\u1ed1i<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n