Taboma
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This panel has a transfer switch for each circuit (top switches). It comes with a pre wired pig tail for the circuits and the utility feed (240).
Typically you move your emergency circuits from the main or sub panel to the generator panel. (j box on the right is the splice) The circuit is still fed from the original breaker, hits the transfer switch in the generator panel and then goes back to the original load via the bottom breakers.
The generator only feeds this panel and has no way back to the home’s main panel. The transfer switches only allow GEN/OFF/Utility and never a combination of the 3.
It eliminates the need to have to worry about shutting down unnecessary circuits (A/C condenser/pool/etc). Which for those that don’t know is very important when using a portable generator. Too much load and the generator breaker will continually trip while your wife and baby are yelling [emoji16]
Edit: attaching reliance’s wiring diagram for reference.
View attachment 940775
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Tried your attachment, didn't work for me. I was more curious just how many wires were in that 3/4 or 1" between the gen panel and J-box I've never seen a transfer panel like that one, pretty cool. Although a tad confused when I noticed two - 2 pole transfers on the left, but only one 2 pole breaker below it.