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Re: Interlock Murray panel
Adding an inlet is a lot like a two pole outlet. You'll want to locate near where the generator will run, of course, and add an additional ground conductor split-bolted to your house ground to connect to your generator's frame ground terminal. Also, ideally, the generator won't have an internal neutral-ground bond.
Adding the interlock will take some drilling on the panel face, not a big deal, and yes, the 3 KW generator sounds like it will be fine. Any other motors besides the fridge? Sump pump, well, septic dosing?
yeah I think so too she only uses CFL's in the house and the two largest loads would be the fridge and microwave, I did not check the furnace pump but it's really tiny I'd be shocked if it was more then 1/2 HP.