windtech007
Member
- Location
- New Mexico
I'm somewhat confused about voltage drop calculations and actual drop.
Seems like most of the time when I check voltage at the main service panel I'll get readings like 245.2v or 123.2v. So when the branch circuit calculation indicates excessive voltage drop where should you start subtracting the drop?
Example, on a 120v ac, 20a, #12awg branch that runs 115' VD is 4.8v or here in New Mexico excessive. But at the main I get 124.2v with my Fluke 87 so can I expect 119.4v at the receptacle? On a 120v circuit 119.4 isn't a problem is it?
With the price of wire now days I don't want to up size if not truly needed.
I just threw the numbers out there for example, not actual.
I appreciate any help you guys can offer.
Thanks,
Phil
Seems like most of the time when I check voltage at the main service panel I'll get readings like 245.2v or 123.2v. So when the branch circuit calculation indicates excessive voltage drop where should you start subtracting the drop?
Example, on a 120v ac, 20a, #12awg branch that runs 115' VD is 4.8v or here in New Mexico excessive. But at the main I get 124.2v with my Fluke 87 so can I expect 119.4v at the receptacle? On a 120v circuit 119.4 isn't a problem is it?
With the price of wire now days I don't want to up size if not truly needed.
I just threw the numbers out there for example, not actual.
I appreciate any help you guys can offer.
Thanks,
Phil