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Rico Soma
Rico Soma, Electrical Technician
Category: Electrical
Satisfied Customers: 21386
Experience:  Service Tech
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I am thinking about purchasing an electric tankless water

Customer Question

I am thinking about purchasing an electric tankless water heater to replace my old tank water heater (American Water Heater E62-50H-045DV - owner's manual says 240 VAC 60Hz single phase 30 amp power supply). The tankless model I'm looking at says it requires "(3) 40 DP breakers required. 112A draw. Required wire: 3 sets 8 AWG. " I'm no electrician, but I am a mathematician, and that (3) 40 DP breakers part sounds like a whole lot more than the 2 15's I see in my breaker box designated for my water heater. Would this take a whole rewiring effort to install, is it possible there are more breakers available to my home than are currently being used? If so, how might I determine if we have what we need?
Submitted: 8 months ago.
Category: Electrical
Expert:  Rico Soma replied 8 months ago.

Welcome to Just Answer, my name is ***** ***** I will do my best to help you with your issue. If my initial response doesn’t answer your question then let me know and we can continue our conversation.

Yes, this unit will need significant rewiring and may be more than your electrical service can handle. That means a new larger service/breaker panel. Probably not worth the expense if that's the case. You could easily be looking at upwards of $3k for wiring if you need a new panel. Unless you currently have a 200 amp service with not much household load it's doubtful your service could handle the additional load this heater would create.

Expert:  Rico Soma replied 7 months ago.

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