A cable question?
A cable question?
(OP)
Can DC conductors be used in the same cable with AC conductors?
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: A cable question?
Mike
RE: A cable question?
Since you mentioned it, what about in a conduit?
Yours, Nick
RE: A cable question?
300-3(c)(1): Conductors of circuits rated 600V, 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.
It seems to me that this is not a problem.
Mike
RE: A cable question?
If the DC is just powering a miscellaneous device, and the voltages are all within the cable insulation rating and there is not a sensitive signal circuit that could be affected by noise, there is no problem having the AC & DC in the cable.
RE: A cable question?
Our utility requires that DC conductors used for control and/or indication be in separate cables from AC, preferably in different conduits (although we will share a conduit if there is only one present). DC wires used to supply light bulbs, cabinet heaters or other 'dumb' loads ARE shared with AC.
We are NEC/CEC exempt for our in-house wiring, so I cannot comment on areas that are subject to it.
RE: A cable question?
Yours, Nick
RE: A cable question?
Are your DC cables shielded? Also, another thing I have seen done when DC had to run in cable trays with AC is to take an unused conductor and ground it on end, making it act as a shield for the active DC conductors.
rmw