Installation details [RE-wrenches]

[Electrical Energy]

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Hi Jay,

The quote for different systems in the same enclosure is:

300.3 (C) 1

The quote for the marking of the neutral is:

200.6 (D)

I didn't send the wording last time, so will am including it below.

"(D) Grounded Conductors of Different Systems. Where conductors of 
different systems are installed in the same raceway, cable, box, auxiliary 
gutter, or other type of enclosure, one system grounded conductor, if 
required, shall have an outer covering conforming to 200.6(A) or 200.6(B). 
Each other system grounded conductor shall have an outer covering of white 
with a readily distinguishable, different colored stripe other than green 
running along the insulation, or shall have other and different means of 
identification as allowed by 200.6(A) or (B) that will distinguish each 
system grounded conductor."

The NEC Handbook explanatory material says:

"The requirements found in 200.6(D) are essentially the same since the 1987 
edition of the NEC. However, these requirements are often misapplied. As 
Exhibit 200.2 shows, if grounded conductors of different systems are 
present in the same enclosure, these grounded conductors must be 
distinguishable, such as by different colors. Careful study of 200.6(D) 
reveals what Exhibit 200.2 shows, that is, where one system uses a white or 
gray insulation for the grounded conductor, the other system must use an 
identification different from the color selected for the first system 
colored insulation. For example, where one system uses white for the 
grounded conductor, the second system must use a different color or marking 
such as gray or white with a stripe. "

If the different system wires are separately bundled and labeled, I 
wouldn't think that the individual neutrals would need to be marked.  This 
is probably a gray area.

-Drake


At 07:18 AM 11/29/2002 -0800, you wrote:
>Hi Drake,
>
>Thanks for the reply.
>
>I've forgotten the exact section that is stated below, could you give me the
>section number?
>
>thanks,
>
>jay
>
>Peltz Power
> > CODE QUOTE
> > (C) Conductors of Different Systems.
> > (1) 600 Volts, Nominal, or Less. Conductors of circuits rated 600 volts,
> > nominal, or less, ac circuits, and dc circuits shall be permitted to occupy
> > the same equipment wiring enclosure, cable, or raceway. All conductors
> > shall have an insulation rating equal to at least the maximum circuit
> > voltage applied to any conductor within the enclosure, cable, or raceway.
> > Exception: For solar photovoltaic systems in accordance with 690.4(B).
> > FPN:See 725.55(A) for Class 2 and Class 3 circuit conductors.
>
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