Small AC motors and Inverters
Disappointed that my ancient Mod Sine Wave inverter (140W cont, 200W surge) shuts down with a 120W coffee grinder. Works ok with the 400W (cont) MSW inverter built-into the truck, though a little ...
Forum Discussion
smkettner wrote:
NEC does not allow doubling of the conductors. Just get the right wire size for the job.
And RVIA standards follow NEC.
Who cares about RVIA and NEC? Not me, and not the OP :) However good advice is always valuable whether from them or anybody else, such as the good folks on this forum.
On doubling wires to get lower R on that path, The forum here told me a while back that it works, but to be sure that the thinner wire could still handle the whole current if the fatter wire broke off somehow. And of course that the fatter wire could take it all too if need be.
ISTR the identical wire thing was for 120v where phasing matters and it is near impossible to achieve, but with DC wires that is not a problem.
My 2000w Vector inverter (which has two pos and two neg terminals) has a wire kit that is two each of 3 feet #4. The ring lugs on those are marked "200A" But the actual inverter manual specifies a single length of 1/0 up to 6 feet and 3/0 to 10 ft. Cobra inverters have a similar arrangement.
I guess Vector and Cobra are still in hiding from the NEC! :)
If I had a PD converter, which has a second set of terminals too, I would be tempted to double them up on the same battery bank instead of to a second battery bank as was likely intended.
