How many current carrying conductors are in a conduit?How many of them are EMTs?

Click to see the full answer.How many carrying conductors are in a conduit?

Take the tables in NEC annex b and c and you'll see that a 1/3 emt conduit is allowed to have 20 # 12thhn wires in it.If there is more than four current carrying, the capacity has to be reduced to 80%.

How many carrying conductors are in the conduit?You can fill 40% of the conduit with 16 and 9 THHN #12's.You can't exceed 40 percent in EMT for more than 2 wires.You must use the 90 C column of table 310.16 to derate if you install 4 to 6 size 12 awg THHN current carrying conductors.

You can either fit one in an EMT or 20.It depends on the wire size and the derating of conductors.

The table ampacities must be adjusted when there are more than four current-carrying conductors in a raceway, cable or earth.The process is referred to as a derating.