Anyone see anything wrong with putting bigger load in a generator panel than the generator is capable of carrying,(as long as the individual circuits are protected and the inter-locks are in place for the mains, and the panel is rated for the combined load, etc....etc.....)so that the individual loads can be turned on and off as needed??? For example....say you've got your well pump on and a few lights and receptacles, and you want to heat your water up, so you turn your lights or whatever off, and turn your water heater on... Am I missing something in the code.. Seems like this should be OK since, if the generator gets overloaded, it will shut down anyway??? Thanks again for the input..I want to make sure I got everything right..I've got a couple of these jobs coming up......... Steve
Sparkynyc, Do you guys, not have Maximum Demand Calculations, in the US?. These give the fact,(called Diversity Factor),that not all of the loads will be drawing current at the same time. We use these calcs, to size Mains and Sub-Mains, over here in New Zealand. These Calcs, can also be applied to Gen-Sets too, as they are the same as a Mains supply.
Re: One more generator question??#19309 12/29/0203:10 AM12/29/0203:10 AM
The power companies use a derating factor from the calculated load of a building. This allows them to use smaller service wire than the calculated load would require if wired by the NEC. They know that electrical usage is not what the calculated load is. Different occupancies have different derating factors depending on simular loads served and thier usage history. Check with the local utility and the AHJ before sizing the generator. Also find out from your customer what he really wants from the generator. You may be suprised how small the required generator will be. Of course if the customer has plans to add load later that should be addressed. Good luck