本帖最后由 移民电工 于 2011-1-23 19:13 编辑 ( l2 q u! m* \. v, v" v: a$ V : A6 @9 [6 n; r7 b2 }# _you can use black/white wire but you need follow color code at terminal(tape it)
! A& F! c7 k2 n- b1 f ' W" u6 v! O' I! A: A! D* X因为laid off 后到NY的朋友(儿子的房东的华人公司)搞点现金所以记了一点美标。回加没有洗脑 $ M9 u+ d6 c% \ q忙中出错,对不起大家了,现改正如下。9 u5 C& X2 s8 N, x0 c* P) s: P: G
" [0 l( o( t4 [% \US, AC:The US National Electrical Code only mandates white (or grey) for the neutral power conductor and bare copper, green, or green with yellow stripe for the protective ground. In principle any other colors except these may be used for the power conductors. The colors adopted as local practice are shown in Table below. Black, red, and blue are used for 208 VAC three-phase; brown, orange and yellow are used for 480 VAC. Conductors larger than #6 AWG are only available in black and are color taped at the ends. 1 T; i7 }) ]; G) e" F: f- a8 s ) \1 G6 j; A) i& p1 NCanada: Canadian wiring is governed by the CEC (Canadian Electric Code). See Table below. The protective ground is green or green with yellow stripe. The neutral is white, the hot (live or active) single phase wires are black , and red in the case of a second active. Three-phase lines are red, black, and blue.
this is what code says:; {2 r) t! ~) e6 a
4-028: Identification of insulated neutral conductors up to and including No. 2 AWG/ t5 A) y/ z& g! B. ?5 C
copper or aluminum 0 ~* N% A L7 T: P5 V3 s. Q8 O(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including8 E/ J. I% U5 k d1 V' E9 v% T
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to1 n% t: B7 F; Y
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes2 a: y& D# z& }
along the entire length of the conductor.9 \& Z! \$ b5 ^) J2 \& V7 ~
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure, A/ \% w( ^4 r, c% V. s* u! e9 Z
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified& t; u* Y% p: P0 P
circuit conductor of the other system, if present, shall be provided with a specific identification, and the r1 i1 J: O3 ~identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not ) j0 c/ b: P& ^green) running along the insulation.& l' d6 L! v3 I% C7 G" y
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of . M1 o* i0 o1 h& v) M8 I+ dan identified conductor; however, in the case of those flexible cords where the identified conductor is 3 j% T# }! {' y& gidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.$ @. H+ k) `* z) q# s( T1 r+ O
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked' H c0 Q# R4 o8 u1 A8 \( O. p
as the identified conductor by painting or other suitable means at every point where the separate 7 Z1 h2 L! x _1 Zconductors have been rendered accessible and visible by removal of the outer covering of the cable, and9 ?8 d" j" J1 I8 f- w7 q3 o* D
the painting or other suitable means of marking the identified conductor shall not be permitted to render# M7 a ^7 K8 B! W9 ~) j M3 I
illegible the manufacturer’s numbering of the conductor.