Question

The size of Rigid RTRC conduit (ID) required for thirty-four conductors - No. 14 RW90XLPE 600 V (without a jacket) is:

-trade size 27 (1")
-trade size 21 (¾")
-trade size 41 (1 ½")
-trade size 35 (1 ¼")

Answer 1

The question concerns engineering and requires determining the suitable size of Rigid RTRC conduit to accommodate thirty-four No. 14 conductors, considering code requirements for conduit fill percentage.

Step-by-step explanation:

The question pertains to the selection of the appropriate size for Rigid RTRC conduit based on the number and size of conductors to be housed within it. When selecting conduit size, it is essential to consider the trade size requirements based on the type and size of the conductors as well as adherence to the National Electrical Code (NEC) or relevant electrical codes which provide guidelines on the percentage fill of a conduit. For the provided scenario of thirty-four No. 14 RW90XLPE 600 V conductors (without a jacket), we need to calculate the total cross-sectional area of the conductors and compare this to the conduit cross-sectional areas available for different trade sizes to determine the most suitable size while maintaining appropriate fill percentage according to code.