Multiple Circuits in one conduit?

[ndan305]

Can I run (3) separate 120v/1ph circuits in a conduit or do they need a separate conduit? If they are in the same conduit do I just need to derate the current carrying capacity of the conductors?

 

[James L]

What size are your conductors and what size is the conduit?

 

[LarryFine]

Yes, as long as you maintain proper sizing, as James mentioned, and appropriate derating, as you mentioned.

 

[infinity]

Can I run (3) separate 120v/1ph circuits in a conduit or do they need a separate conduit? If they are in the same conduit do I just need to derate the current carrying capacity of the conductors?

Yes, 3 circuits with separate neutrals would be 6 CCC's and a derating of 80%.

 

[LarryFine]

Yes, 3 circuits with separate neutrals would be 6 CCC's and a derating of 80%.

Or rather, if I may, a derating to 80%.

 

[augie47]

Short answer....combined in one conduit and derated to 80%

(In the event someone is playing "technical" the circuit size, wire size, type insulation, environment (wet vs dry) and if it was a multireceptale cord & plug load could effect the answer in 1% of the cases)

 

[infinity]

Or rather, if I may, a derating to 80%.

To or of, can be either. Derating of 80% applied to the ampacity from T310.16.