What size conduit is required for 4#1AWG THHN conductors that are installed in a EMT conduit?
Per Table C.1 we can fit 4#1AWG THHN in 1-1/4? EMT C.
Per Chapter 9, Table 5 is listing the area of #1THHN is 0.1562 * 4 = 0.6248. Per Chapter 9, Table 4 the maximum allowable area in a 1-1/4?C utilizing the 40% fill rule for over 2 conductors is 0.598. This only allows us to install 3#1AWG THHN conductors in a 1-1/4? Conduit.
Which is correct?
Thanks
Per Table C.1 we can fit 4#1AWG THHN in 1-1/4? EMT C.
Per Chapter 9, Table 5 is listing the area of #1THHN is 0.1562 * 4 = 0.6248. Per Chapter 9, Table 4 the maximum allowable area in a 1-1/4?C utilizing the 40% fill rule for over 2 conductors is 0.598. This only allows us to install 3#1AWG THHN conductors in a 1-1/4? Conduit.
Which is correct?
Thanks