current inbalance
current inbalance
(OP)
Is there a section in the code that pertains to the maximum amount of current inbalance allowed for a three phase 4 wire 277/480 volt 1000 amp service entrance conductors? If so where can it be found or is it just a certain percentage allowed?
I have a situation where parallel conductors have been tapped but they did not incorporate all three conductors of each phase & neutral when they tapped the wires. In my opinion this is illeagle since you will be creating and inbalance on the conductors on each phase thus creating inductance that will eventually burn up the wiring.
I have a situation where parallel conductors have been tapped but they did not incorporate all three conductors of each phase & neutral when they tapped the wires. In my opinion this is illeagle since you will be creating and inbalance on the conductors on each phase thus creating inductance that will eventually burn up the wiring.
Talk To Other Members
RE: current inbalance
Taps are covered in the NEC and are permitted if the rules are met.
I don't think the inductance is going to have much heating effect.
David Castor
www.cvoes.com
RE: current inbalance
RE: current inbalance
So, as long as the conductors are properly installed and protected from overcurrent, there is no restrictions on imbalance. From an engineering point of view, balance is good practice to allow economy of conductors, transformers, and devices, but some imbalance is nearly always present to some degree, and is frequently unavoidable.