metaldome88
Member
Is it required to pull a ground wire to feed DC panels? Branch circuits? I was under the impression it wasn't necessary but I can't find anything concrete to validate that assumption. Thanks.
DC CIRCUITS GROUNDING
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metaldome88
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Re: DC CIRCUITS GROUNDING
It's 125vdc 2wire, 225amp MLO, two panels, one with feed thru lugs. We are only responsible for wiring between the panels and have one load to wire, DC emergency lights. My question is if a green grounding conductor is required to be pulled between the panels and also to the DC light? All conduit is EMT. Sorry for not describing the setup better.
It's 125vdc 2wire, 225amp MLO, two panels, one with feed thru lugs. We are only responsible for wiring between the panels and have one load to wire, DC emergency lights. My question is if a green grounding conductor is required to be pulled between the panels and also to the DC light? All conduit is EMT. Sorry for not describing the setup better.
Re: DC CIRCUITS GROUNDING
NEC recognizes several wiring methods with properly installed metal raceway systems, including EMT, that do not require a green wire as a "redundant" equipment grounding conductor.
125VDC is a specialized application, usually industrial. Most likely I would use a "redundant" green or bare- minimum size per 250.122.
NEC recognizes several wiring methods with properly installed metal raceway systems, including EMT, that do not require a green wire as a "redundant" equipment grounding conductor.
125VDC is a specialized application, usually industrial. Most likely I would use a "redundant" green or bare- minimum size per 250.122.
john m. caloggero
Senior Member
Re: DC CIRCUITS GROUNDING
I understand that the 2-wire, DC system is installed in EMT, therefore, the EMT serves as the the equipment grounding conductor. See Section 250.118 of the 2005 NEC. Remember that one of the system conductors must be connected to a grounding electrode system and then becomes the grounded conductor.
I understand that the 2-wire, DC system is installed in EMT, therefore, the EMT serves as the the equipment grounding conductor. See Section 250.118 of the 2005 NEC. Remember that one of the system conductors must be connected to a grounding electrode system and then becomes the grounded conductor.
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