ECN Forum Forums Photo Discussion Forums Photos for General Discussion Is there a better way??

No codes broken on mixing
systems.

There are requirements for
identification of the different
systems.

Scott, I have used 12" x 12" trough and
just bought extra ends for it so I
could make separate compartments in it.

I have done this just for ease of identification,
each compartment handled
a separate panel.

I had intended to put some chase nipples
through the barriers if needed but
we did not need to.

I think it looks "cleaner" than separate
enclosures.

Bob



[This message has been edited by iwire (edited 04-21-2004).]

I am sure that in Canada that this would not pass,because there are different sources in the same raceway.
In the States if you had two panels side by side and ran a con duit out of each one into a single junction box and incorporated these from here in a single conduit,is that o.k.?

General practice here is to not mix systems but it's only a violation when dealing with article 700 emergency systems and hospital critical/life safety systems. If I understand your question correctly what you describe is OK in the states.

'99NEC 300-3
(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 Section 690-4(b).
FPN: See Section 725-54(a)(1) for Class 2 and Class 3 circuit conductors.



Bob,
Does this make it not a wireway??

In the past, Tom, one of our members, has brought up the idea of a "custom made box" with the same dimensions as the wireway.

So, what would be the real difference between a wireway with 50 conductors in a cross section, or a box with 50 conductors in a cross section??


[This message has been edited by electure (edited 04-21-2004).]

Code or real world?

This is just my opinion but the NEC (correctly so) assumes worst case loading
of all conductors, but be honest are all those conductors loaded up to the max
at the same time?

Not on most jobs I work, the last one I
worked had 3 duplex outlets per circuit.

A 126 circuit panel (triple tub)
is drawing less than 50 amps per
leg.

If I had run all those circuit
into the panel in one 4" conduit
I would be surprised if it got
warm. (I did not do this, it is
a code compliant job.)

Bob