UL火线零线的颜色

fasten · 发表于 2015-12-25 12:32

jsspace 发表于 2015-12-25 12:25 - O# u% T! F- W. g5 m E
其实有规定的，我看到UL1598上有写明白色的是零线，火线的颜色没有规定，跟零线不同即可

谁敢说没有规定的？
6.10 Identification and polarity
6.10.1 A conductor terminal intended for the connection of the neutral conductor of the branch circuit shall be substantially white in color or be marked neutral adjacent to the terminal in accordance with Table 20.1.1, Item 1.5.
6.10.2 The insulation on a conductor intended for connection to the neutral conductor of the branch circuit shall be identified by one of the following means:
(a) be colored white or grey;
(b) be of any color except green, with a continuous white tracer throughout its length;
(c) be identified at the point where connected to the branch circuit by white paint, tape, ink, or permanent tag; or
(d) be provided with one or more raised longitudinal ridges, if a parallel conductor flexible cord.
6.10.3 The identified terminal of a wiring device shall be connected to the neutral conductor of the branch circuit.
6.10.4 A cord-and-plug-connected luminaire equipped with a polarized two-pole, two-wire parallel blade attachment plug shall be marked for proper polarity in accordance with Table 20.1.1, Item 4.5.

fasten · 发表于 2015-12-29 10:25

head0819 发表于 2015-12-25 13:08 ( {! f4 Q& E( G
我们还是参考一下UL62 Flexible Cords and Cables

其实所有这些所谓的白色/灰色是零线的要求要回到：NFPA 70 第200.6节要求：
200.6 Means of Identifying Grounded Conductors.
(A) Sizes 6 AWG or Smaller. An insulated grounded conductor
of 6 AWG or smaller shall be identified by one of
the following means:
(1) A continuous white outer finish.
(2) A continuous gray outer finish.
(3) Three continuous white or gray stripes along the conductor’s
entire length on other than green insulation.
(4) Wires that have their outer covering finished to show a
white or gray color but have colored tracer threads in
the braid identifying the source of manufacture shall be
considered as meeting the provisions of this section.
(5) The grounded conductor of a mineral-insulated, metalsheathed
cable (Type MI) shall be identified at the time of
installation by distinctive marking at its terminations.
(6) A single-conductor, sunlight-resistant, outdoor-rated
cable used as a grounded conductor in photovoltaic
power systems, as permitted by 690.31, shall be identified
at the time of installation by distinctive white
marking at all terminations.
(7) Fixture wire shall comply with the requirements for
grounded conductor identification as specified in 402.8.
(8) For aerial cable, the identification shall be as above, or
by means of a ridge located on the exterior of the cable
so as to identify it.

(B) Sizes 4 AWG or Larger. An insulated grounded conductor
4 AWG or larger shall be identified by one of the
following means:
(1) A continuous white outer finish.
(2) A continuous gray outer finish.
(3) Three continuous white or gray stripes along the conductor’s
entire length on other than green insulation.
(4) At the time of installation, by a distinctive white or
gray marking at its terminations. This marking shall
encircle the conductor or insulation.
(C) Flexible Cords. An insulated conductor that is intended
for use as a grounded conductor, where contained
within a flexible cord, shall be identified by a white or gray
outer finish or by methods permitted by 400.22.
(D) Grounded Conductors of Different Systems. Where
grounded conductors of different systems are installed in
the same raceway, cable, box, auxiliary gutter, or other type
of enclosure, each grounded conductor shall be identified
by system. Identification that distinguishes each system
grounded conductor shall be permitted by one of the following
means:
(1) One system grounded conductor shall have an outer
covering conforming to 200.6(A) or (B).
(2) The grounded conductor(s) of other systems shall have
a different outer covering conforming to 200.6(A) or
200.6(B) or by an outer covering of white or gray with
a readily distinguishable colored stripe other than green
running along the insulation.
(3) Other and different means of identification as allowed
by 200.6(A) or (B) that will distinguish each system
grounded conductor.
The means of identification shall be documented in a
manner that is readily available or shall be permanently
posted where the conductors of different systems originate.
(E) Grounded Conductors of Multiconductor Cables. The
insulated grounded conductors in a multiconductor cable shall
be identified by a continuous white or gray outer finish or by
three continuous white or gray stripes on other than green
insulation along its entire length. Multiconductor flat cable
4 AWG or larger shall be permitted to employ an external
ridge on the grounded conductor.
Exception No. 1: Where the conditions of maintenance and
supervision ensure that only qualified persons service the installation,
grounded conductors in multiconductor cables shall
be permitted to be permanently identified at their terminations
at the time of installation by a distinctive white marking or
other equally effective means.
Exception No. 2: The grounded conductor of a multiconductor
varnished-cloth-insulated cable shall be permitted to be

identified at its terminations at the time of installation by a
distinctive white marking or other equally effective means.
Informational Note: The color gray may have been used in
the past as an ungrounded conductor. Care should be taken
when working on existing systems.

有兴趣的可以看看。Grounded就是说的Neutral。你所列的UL62要求就是200.6 (C)要求。

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