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Old 04-02-2013, 08:53 AM   #1
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difffernt voltages in a panel

is it code to have several different voltages -600, 120 vac and 48vdc, in the same panel ?


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Old 04-02-2013, 08:58 AM   #2
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Old 04-02-2013, 10:28 AM   #3
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Originally Posted by conrad cromwell View Post
is it code to have several different voltages -600, 120 vac and 48vdc, in the same panel ?
Depends where and what you mean by panel.
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Old 04-02-2013, 11:17 AM   #4
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If you are talking about a panelboard with overcurrent protective devices, then it's is very unlikely that would be code compliant. Theoretically possible, but it would be a very special custom installation and there's probably no good reason for it. In other contexts like control panels, it is very common to have multiple voltages and classes of circuit in one device. Certain rules regarding wiring methods and separation apply.
I am a lawyer, but not your lawyer. And who cares anyways? We're here to talk construction. This is DIY advice, not legal advice.
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Old 04-02-2013, 07:02 PM   #5
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I've built industrial control panels that were fed with 480 3, had 480 motor starters and VFDs in them, plus a control transformer for 120, plus a 24DC power supply.

Most motor control center buckets have both 480 and 120, VFD ones have 480, 120, and 24DC.

I've also seen split-bus switchgear that had 480 on the top busses and 120 on the bottom set.

It's also common for a ball field lighting switchgear to have a 480 panel and a 120 panel mounted in the same section with no separation between them. But they are two (or more) separate panels.

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