Combining Motors and Receptacle

[mstrlucky74]

If these are fed from same panel and drawings/ specs don't indicate otherwise would you combine these two circuits in the same pipe? ANy reason why you wouldn't. What I'm getting at, is there ROT that maybe only 1P motors ckts could go in same pipe as receptacle circuits. Again feed from same panel( spec most of the time reads not to combine ckts from different panels in same raceway). Thanks.

 

[Buck Parrish]

I don't see a problem with it.

 

[mstrlucky74]

I don't see a problem with it.

Thanks how about if you had a 3P 20A motor circuit?

 

[infinity]

Thanks how about if you had a 3P 20A motor circuit?

They're from the same so panel so no need to run more than one conduit. Just keep in mind derating for more than 3 CCC's in the raceway.

 

[mstrlucky74]

They're from the same so panel so no need to run more than one conduit. Just keep in mind derating for more than 3 CCC's in the raceway.

Thanks.

 

[mstrlucky74]

They're from the same so panel so no need to run more than one conduit. Just keep in mind derating for more than 3 CCC's in the raceway.

Regarding derating. If I have receptacles and motors in same conduits( neutrals are CCC) and they are feed from a 20A breakers and I have 7-9 conductors in one conduit #12 wire would not work as I have to derate by 70%. I'd have to to use #10's? Also isnt most equipment wire now rated 90 degree so you can use that column for amperages. Thanks.

 

[LarryFine]

If I have receptacles and motors in same conduits( neutrals are CCC) and they are feed from a 20A breakers and I have 7-9 conductors in one conduit #12 wire would not work as I have to derate by 70%. I'd have to to use #10's?

No, you only have to derate TO 70%. You can start with the 90 deg. rating; you can still use #12 at 21a.

 

[mstrlucky74]

No, you only have to derate TO 70%. You can start with the 90 deg. rating; you can still use #12 at 21a.

21a is correct using the 90 degree column but if using the 75 degree I get 17.5A.

 

[sameguy]

Unless it is an old breaker than 60deg.C column.

 

[infinity]

21a is correct using the 90 degree column but if using the 75 degree I get 17.5A.

The conductor will likely be THHN (which is a 90° C conductor) so you use the 90° C ampacity for derating not the 75° C ampacity.

 

[mstrlucky74]

The conductor will likely be THHN (which is a 90° C conductor) so you use the 90° C ampacity for derating not the 75° C ampacity.

Got it but don't you have to take the equipment and breakers terminals into consideration too?