N normbac Senior Member Dec 28, 2009 #1 On a heat pump do you add 1.25 to the minimum circuit amps that the manufactures plate states, or is that already factored in to the MCA TIA
On a heat pump do you add 1.25 to the minimum circuit amps that the manufactures plate states, or is that already factored in to the MCA TIA
augie47 Moderator Staff member Location Tennessee Occupation State Electrical Inspector (Retired) Dec 28, 2009 #2 You may size your conductor using the MCA number (no multiplier)
D DARUSA Senior Member Location New York City Dec 28, 2009 #3 normbac said: On a heat pump do you add 1.25 to the minimum circuit amps that the manufactures plate states, or is that already factored in to the MCA TIA Click to expand... Size your conductor based MCA (Minimum Circuit Ampacity) and size your OPD base on the MCB (Maximum Circuit Breaker) or MFS (Maximum Fuse Size)required by the nameplate! Last edited: Dec 28, 2009
normbac said: On a heat pump do you add 1.25 to the minimum circuit amps that the manufactures plate states, or is that already factored in to the MCA TIA Click to expand... Size your conductor based MCA (Minimum Circuit Ampacity) and size your OPD base on the MCB (Maximum Circuit Breaker) or MFS (Maximum Fuse Size)required by the nameplate!
R rikthejman Member Location Oregon Dec 29, 2009 #4 I would take a look at 440.6 (A)Exception #1. Hope that helps