Dale Hayes
Senior Member
If a 6Ga. 90C THHN copper conductor reaches 194F at 75 Amps (based on ambient temperature of 30C (86F), what is the 6Ga. 90C THHN copper conductor temperature if only 30Amps is applied?
If a 6Ga. 90C THHN copper conductor reaches 194F at 75 Amps (based on ambient temperature of 30C (86F), what is the 6Ga. 90C THHN copper conductor temperature if only 30Amps is applied?
I imagine you calculated 30?/75? = 0.16 =16%.you will only generate 16% of the heat when you have 30A versus 75A.
an interesting question. is this on a test?
16% of 194 is 31.04. What is the mathematics to end up with 103F?
Insignificant, perhaps... but definitely not nil.Smart ... Resistance change for ga cited is nil!
I said perhaps! It would not be significant if the wires are only a few feet long. It would be significant if the wires are a thousand feet long. OP did not state circuit length, purpose for the analysis, etc. Lacking details makes it kind of hard to say what is and isn't significant...Smart...
Thanks for your significant post revealing that "insignificant" is more significant than "nil!":lol:
Phil
Or are you the type to just make willy-nilly assumptions no matter what the case may be...
But if we are in turn making rash assumptions, it works out just fine.Not usually!
GoldDigger...
Happy to hear from you! Did you forward my EXCEL V-Drop Calc to those wishing to remain anonymous!
Phil