Installing A Stiebel Electric Tankless Water Heater…do I Need To Install An Electrical Sub-panel?
Posted on | February 20, 2010 | 3 Comments
The unit requires three 50 amp 2-pole breakers and three runs of 8-2 romex. I understand that different states have different electrical codes…my question is for Pennsylvania. Is there any reason why I would have to install a separate sub-panel for the three 50 amp 2-pole breakers that supply the heater, or can I just install the three breakers in my main panel? The heater will only be about 10-15 feet from where the panel is.
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Category: Uncategorized
Tags: Electric > Electrical > Heater...do > Install > Installing > Need > Stiebel > Subpanel > Tankless > Water
Tags: Electric > Electrical > Heater...do > Install > Installing > Need > Stiebel > Subpanel > Tankless > Water
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3 Responses to “Installing A Stiebel Electric Tankless Water Heater…do I Need To Install An Electrical Sub-panel?”
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February 20th, 2010 @ 7:32 pm
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.
February 21st, 2010 @ 1:06 am
if you have the extra spaces in your main panel (you will need 6 spaces) than that is the better choice most people do not have the extra spaces.
I hope you have at least a 200 amp service.
and remember to protect romex wherever it shows below 6 foot high
February 23rd, 2010 @ 5:44 am
Give safety measures when installing it yourself, to have peace of mind try to contact professionals to provide good installation.