A aielloelectric Member Aug 7, 2012 #1 I woud like to know what size feeder from a 100a 480 buss switch to the roof, then tap to (2) A/C units that are min 32a max 40a
I woud like to know what size feeder from a 100a 480 buss switch to the roof, then tap to (2) A/C units that are min 32a max 40a
augie47 Moderator Staff member Location Tennessee Occupation State Electrical Inspector (Retired) Aug 7, 2012 #2 Not a simple answer... (a) What size fuses/breaker at the buss duct switch ? (100 amp ?) (b) Once the feeder branches to the A/C units, how long are those branch runs ? (c) How much of the conduit/wire system is on the roof ?
Not a simple answer... (a) What size fuses/breaker at the buss duct switch ? (100 amp ?) (b) Once the feeder branches to the A/C units, how long are those branch runs ? (c) How much of the conduit/wire system is on the roof ?