Mark Rand wrote:


Has everybody missed the point that fitting proper interlocks is _precisely_
what Iggy is proposing to do? OK he's not buying a nice idiot homeowner retail
kit from home-generators_R_us. He is engineering a solution that is at least
as foolproof and effective. Good luck to him!



Mark Rand
RTFM

No point missed. He isn't engineering anything. He is trying to cobble
stuff together to avoid the use of a proven, approved for the purpose
and readily available DPDT transfer switch.

You design, test and submit for approval alternative devices when a
suitable device is not manufactured.