Recent content by zmrbill

I am new to FEMM 4.2 and need help setting up a simple current flow problem. I have a square copper sheet that has input and output terminals (square contacts) in opposite corners and and 1000A flowing across it. The sheet is 16" square and the contacts are 2" square. The sheet is 0.050" and...

Simple answer, use a solar panel directly. AllElectronics.com has a 12V and 6V solar panel that can safely charge your batteries, albeit slowly. Solar cells have an intrinsic series resistance that will limit the current. You will also want to add a 1N4007 diode. Another option would be to...

The others are right, consult the NEC table. The other concern is that the protection circuitry (fuses or circuit breaker) opens before the wire becomes a plasma ball in the case of a fault. If this is a customer installation there could be legal implications! Never underestimate the...