DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Electrical (http://www.diychatroom.com/f18/)
-   -   Water Heater Disconnect (http://www.diychatroom.com/f18/water-heater-disconnect-90482/)

SeventhReign 12-26-2010 06:48 PM

Water Heater Disconnect
 
I am in the process of buying a Dual Element 4500 watt Electric Water Heater that pulls 18.75 Amps.

My question is: Does it matter whether I get a 30 Amp or 60 Amp Disconnect? Would I be safer with a 30 Amp Disc., in case there is a short and it starts pulling more than 30 amps?

brric 12-26-2010 06:52 PM

Does not matter. Circuit should be rated at only 30 amps anyway.

Speedy Petey 12-26-2010 08:43 PM

Quote:

Originally Posted by SeventhReign (Post 557214)
Would I be safer with a 30 Amp Disc., in case there is a short and it starts pulling more than 30 amps?

No, everything is rate in amps and AIC. AIC refers to short circuit amps.

jbfan 12-26-2010 08:56 PM

Quote:

Originally Posted by SeventhReign (Post 557214)
I am in the process of buying a Dual Element 4500 watt Electric Water Heater that pulls 18.75 Amps.

My question is: Does it matter whether I get a 30 Amp or 60 Amp Disconnect? Would I be safer with a 30 Amp Disc., in case there is a short and it starts pulling more than 30 amps?

A disconnet is just that, a disconnect.
It offers no protection from overload in anyway.

nap 12-26-2010 09:25 PM

not sure it is clear to you so, a bit of explanation.

The rating of the disconnect is the maximum sized circuit you can use it on. With the 30 amp, you can run up to a 30 amp circuit through it. With the 60 amp disco, you can run up to a 60 amp circuit through it.

You shouldn't need over a 30 amp disco since you would be running a 30 amp circuit. You can use a 60 amp disco if you want though.

AllanJ 12-27-2010 09:12 AM

The water heater specifications probably give a maximum circuit rating as well as a recommended (30 amp) circuit rating.

The gauge of the cable conductors (any cable on that branch circuit) imply a maximum circuit rating.

If you install a disconnect switch with a higher rating for futureproofing purposes, you would not be able to upgrade the circuit to a higher ampere rating unless all other components in the circuit are compatible with that rating.


All times are GMT -5. The time now is 11:58 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved