I have a 20A DC device that I am powering from two different 12V DC sources and one AC 120V source (the AC source will drive a PS in the case to supply 12V DC) depending on availability:
- Internal Battery DC
- External Battery DC
- AC 120
So 3 power sources in, but the same feed line out to the device. I want a simple switch which doesn't need to maintain power between switchover—so completely disconnected from each source. I looked at a regular rotary switch but most don't handle 20A. Usually around an amp or two at most. Can you point me to a rotary that will work for this? I need 4 positions and 4 poles? (one position being "Off").