I have 12 cord connected 208-240v, 3.2A, 1/3hp, 1ph fan motors. They are electronically protected. I would like to split them into two circuits. They will be continuous duty. Would I take the first at 125% then add the rest? Is there anyway reason not to calculate them off FLC? Can someone point me in the right direction please.
Multiple small cord connected motors circuit engineering
- Thread starter WadeC
- Start date
Forgive me. Cord and plug 240v wall mount fans. Internal overload. Big Ass Fan brand.
Have you checked the install instructions. Most of the bigass fans I have seen include specific instructions on line side protection. ( I know the larger ones call for individual protection). Otherwise it appears 430.42(c) would apply
Yes. All 6 will run at the same time for over 3 hours.
240v
yes. There are three larger fans at the location that are on individual circuits.
240v
yes. There are three larger fans at the location that are on individual circuits.
If I’m reading this right. The circuit has to be rated at the rating of the receptacle? Because the fans have an integrated overload.
I think this comes down to is this a motor or an appliance. If these are all simultaneously continuous appliance loads, 6 may be too many for a 20A circuit. Make sure the instructions don't limit you to a 15A circuit.
With the broad nameplate voltage, the actual amps drawn are probably below nameplate since it is being supplied at 240V. But safest bet is to add up the nameplates, apply a 125% factor to that sum, and that is the branch circuit load.
With the broad nameplate voltage, the actual amps drawn are probably below nameplate since it is being supplied at 240V. But safest bet is to add up the nameplates, apply a 125% factor to that sum, and that is the branch circuit load.