TCC plot reference voltage
TCC plot reference voltage
(OP)
Hello,
Suppose I have a 3-phase 480V panel which has 277V branch positions. Is it correct that the TCC plot reference voltage should
be 480V? I am trying to plot a branch circuit breaker and am unsure if it should be 277V or 480V. Will a single pole single phase breaker off of such a panel see the 480V fault current?
Thanks.
Suppose I have a 3-phase 480V panel which has 277V branch positions. Is it correct that the TCC plot reference voltage should
be 480V? I am trying to plot a branch circuit breaker and am unsure if it should be 277V or 480V. Will a single pole single phase breaker off of such a panel see the 480V fault current?
Thanks.






RE: TCC plot reference voltage
The curve drawing software might incorrectly move the curve by a 1.732 factor if you enter 277V for the base. Try it and see.