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Posted by: alex_713 on 2009-11-20, 12:16:39
As long your panel is within sight of your new heater, you won't need a means of disconnecting your new water heater. If it isn't within sight (in another room or space), you'll need disconnects for each 50A/ 240V feed. Usually you can pick up stab-in type, 60A, 2 pole, Nema 3R, A/ C disconnects at the HD for around 8 dollars each if needed. Depending on your existing panel, the 2 pole breakers going in it could get pricey, but start around 20 dollars each. And I would only feel comfortable running (what I am assuming is a 30kW) water heater on a 300 or 400A service. Because all it would take is something like your electric heat coils (if you have electric heat) to kick on while running your washing machine/ shower (using hot water) to overload a 200A or smaller service. Personally, I would consider a gas operated unit (if you have gas available). Really, if you are the least bit unsure, consult an electrician. Don't burn your house down. |
