I personally am not that concerned about the what-if. But it would be a relatively easy thing to check now that we know about it. With the mains off, check for continuity between the panels at the load side of each main. Well, that might still ring due to the neutrals being tied. So continuity isn't the right check. Resistance. There should a high resistance. If it is close to zero, then there is a direct tie.Yes, I didn't even think about that. :sad:
You could get an ATS and feed a small sub panel. You'd have to hack some of the wiring on it so that it'll shut off the generator power if it sees any power on the utility side (as opposed to if it sees one leg it'll transfer to generator power.)...Yeah, you're right. Even a typical 6 circuit transfer switch has the ability to do what I said.
Forget I said anything, I am so stupid :sad:
I know this is an ancient topic but I have a similar situation. 320a, 1ph 240v service and a 16.5kw propane Generac. I’m Set up with 1 ea 200amp panel and 2 ea 150amp panels. Want to split out to all 3 loads.I have a customer that wants to do the same thing, run a 320A/dual 200 service with a portable generator. Instead, I gave him a price on a standby 25KW natural gas generator with dual 200A, service entrance rated transfer switch. He hasn't decided yet.
The problem with a portable generator is, most are not rated for computer, electronics and circuit board use, and they're loud. The potable Honda EU7000iS is a good choice but costs almost $5,000. Another problem is gasoline storage.
For a $5,600, I can purchase both the 25KW and transfer switch.
Thanks for posting on ElectricianTalk.com. However, working with electricity and electrical systems can be unsafe if not done by a professional licensed electrician. The moderators of this site would like to advise you to contact a professional electrician in your area.I know this is an ancient topic but I have a similar situation. 320a, 1ph 240v service and a 16.5kw propane Generac. I’m Set up with 1 ea 200amp panel and 2 ea 150amp panels. Want to split out to all 3 loads.
can you tell me what equipment you used for switching and a simple diagram if exists.
thanks in advance for any help.