- Location
- Windsor, CO NEC: 2017
- Occupation
- Service Manager
From a PM:
I have no idea what this formula is. I would simply use the Table and be done with it.
Hillsman4ever said:I Asked this question previously but i did not understand the answer because i might have asked it wrong so i am trying the question again I have a chiller with a 700amp rating on the name plate with 480volts and the MDP 230' away please tell me the formula for getting the correct size feeders so far i used 2 x 230 x 12.9 x 700 x .866 = 3597190.8/14.4 = 249804.91 which is 250mcm feeders 310.16 says 250mcm is only good for 255 amps, please tell me what i did wrong in my calculations.
I have no idea what this formula is. I would simply use the Table and be done with it.