sparky00004
Member
in the code book under emt conduit fill for #12 thhn,thwn it is allowed 16 number 12,but it also says that more than three current carrying conductors in raceway or cable,you must derate and apply adjustment factors so 4-6=80% 7-9=70% 10-20=50%
it also says that a 12thwn at 75 degrees terminatin under a 75 degree terminal is capable of handling up to 25 amps ans 12thhn at 90degrees can handle up to 30 amps,but most terminations are under 75 degrees terminals
so that tells me that if i had six number 12 in 3/4 emt conduit thhn,thwn conductors i will derate at a value of 25 amps*80%=20 amps.
so i want to new if six number 12 thhn,thwn in a 3/4 emt conduit is the most wires allowed before i would have to go to the next size wire.
it also says that a 12thwn at 75 degrees terminatin under a 75 degree terminal is capable of handling up to 25 amps ans 12thhn at 90degrees can handle up to 30 amps,but most terminations are under 75 degrees terminals
so that tells me that if i had six number 12 in 3/4 emt conduit thhn,thwn conductors i will derate at a value of 25 amps*80%=20 amps.
so i want to new if six number 12 thhn,thwn in a 3/4 emt conduit is the most wires allowed before i would have to go to the next size wire.