additional circuits run through receptacle box.

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GoldDigger

Moderator
Staff member
Location
Placerville, CA, USA
Occupation
Retired PV System Designer
It is OK even from different systems. Like 120V for the receptacles and 277 for the lighting in the same box is OK.

Just do not mix power-limited and control with power circuits except under the specific exceptions offered. And do not have one circuit using a lower voltage wiring insulation than the other.
 

jumper

Senior Member
And do not have one circuit using a lower voltage wiring insulation than the other.

Well sorta. As long as the lowest rated insulated wire is rated for the highest voltage present in the box, you could have mixed values.

300.3(C) Conductors of Different Systems.
(1) 1000 Volts, Nominal, or Less. Conductors of ac and dc
circuits, rated 1000 volts, nominal, or less, 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.
 

Ponchik

Senior Member
Location
CA
Occupation
Electronologist
Well sorta. As long as the lowest rated insulated wire is rated for the highest voltage present in the box, you could have mixed values.

300.3(C) Conductors of Different Systems.
(1) 1000 Volts, Nominal, or Less. Conductors of ac and dc
circuits, rated 1000 volts, nominal, or less, 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.

Another words you can have a conductor that is rated at 240V and a conductor rated at 600V but the maximum voltage available in that enclosure or conduit is 240V.
 
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