This PVC conduit fill table is used to determine how many THWN or THHN wires can be safely put into PVC conduit tubing. Each row going across is a different size of PVC conduit (Schedule 40 or 80). Each column (going up and down) is a different gauge of wire. The results show the allowable number of wires for each size/type of conduit and wire, based on the 2020 NEC code.
2020 NEC,NFPA 70,NATIONAL ELECTRICAL CODE BOOK .PDF Download now
