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
pianotuna wrote:
Hi brulaz,
Let me say it another way.
If the fuse is too large for the wire size chosen then the wire becomes the fuse. That is not a good thing.brulaz wrote:
And I presume the de-rated amperage the program reports (136A in my scenario) should be the max fuse rating?
ISTR the NEC specifies that fuses and breakers must not be run continuously at over 80% of their ratings, but the wire itself can be run to its rating ok. So when you fuse a wire for the wire's rating, you have to "overfuse" it by 1.25
that would seem to leave a slight gap in protection between what the wire is allowed and when the fuse will blow (Of course I may have that all wrong!)
