I have XHHW-2 type wire that per the NEC is rated at 90 degrees. Does the breaker that I am landing this wire to also need to be rated at 90 degrees to use the 90 degree ampacity?
I have XHHW-2 type wire that per the NEC is rated at 90 degrees. Does the breaker that I am landing this wire to also need to be rated at 90 degrees to use the 90 degree ampacity?
Be aware, there are no UL listed breakers or fusible switches that can be used with the 90?C ampacities. Even though some equipment requires 90?C insulation the conductors must be sized at least as large as required under thee 75?C column.I have XHHW-2 type wire that per the NEC is rated at 90 degrees. Does the breaker that I am landing this wire to also need to be rated at 90 degrees to use the 90 degree ampacity?
I have XHHW-2 type wire that per the NEC is rated at 90 degrees. Does the breaker that I am landing this wire to also need to be rated at 90 degrees to use the 90 degree ampacity?
No such thing as a typical 90?C-rated installation under 600 volts, that I'm aware of.Where would 90'C be a typical installation in the wiring methods under 600 volts? I can see using the column for the derate, but thought most 90 degree equipment was for over 600 volt for typical installation (providing it is rated for the activity)(110.40)