florida-sparkey
Senior Member
- Location
- Pinellas Park, Florida
- Occupation
- Master Electrician
Hello,
I have a 3 phase machine to wire. Please check my calculation if you don't mind.
Unit has lots of small motors and water pumps. I do not intend to 125% the circuit because I assume the engineers did so when creating the data tag. However it does not state MCA so please tell me if I am wrong and should increase the circuit to 125%.
Circuit length is short, about 60 feet.
Control module has internal disconnect and is within sight of the panel. (no disconnect needed)
I am wiring to a 240V delta service (unit has internal xformer for voltage conversion)
Data tag on control module states 208V 120A 60Hz.
I am converting data tag voltage to the applied voltage to size my circuit-
208V x 1.732 x 120A = 43231VA
43231VA / (240V x 1.732) = 104A
104A circuit size.
Circuit size 1/0 AL or #2CU with #6CU EGC
Thank you for your time!!
I have a 3 phase machine to wire. Please check my calculation if you don't mind.
Unit has lots of small motors and water pumps. I do not intend to 125% the circuit because I assume the engineers did so when creating the data tag. However it does not state MCA so please tell me if I am wrong and should increase the circuit to 125%.
Circuit length is short, about 60 feet.
Control module has internal disconnect and is within sight of the panel. (no disconnect needed)
I am wiring to a 240V delta service (unit has internal xformer for voltage conversion)
Data tag on control module states 208V 120A 60Hz.
I am converting data tag voltage to the applied voltage to size my circuit-
208V x 1.732 x 120A = 43231VA
43231VA / (240V x 1.732) = 104A
104A circuit size.
Circuit size 1/0 AL or #2CU with #6CU EGC
Thank you for your time!!