Hot Water Heater Breaker???? - Electrical - DIY Chatroom Home Improvement Forum


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Electrical

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 12-19-2008, 08:17 AM   #1
Newbie
 
Join Date: Jul 2007
Posts: 16
Rewards Points: 10
Question

Hot water heater Breaker????


What is the recommended breaker size for the hot water heater

Advertisement

Bigbobdallas is offline   Reply With Quote
Old 12-19-2008, 08:32 AM   #2
Member
 
Join Date: Nov 2008
Posts: 187
Rewards Points: 150
Default

Hot water heater Breaker????


If electric normally 30 amp. Do you have your instructions? It may say on the side of it also.

Gary

Advertisement

Gary_602z is offline   Reply With Quote
Old 12-19-2008, 08:50 AM   #3
My License Ain't 4 Sale..
 
Join Date: Feb 2008
Location: Atlanta, Ga/Hamilton, Al
Posts: 1,813
Rewards Points: 1,000
Default

Hot water heater Breaker????


Quote:
Originally Posted by Bigbobdallas View Post
What is the recommended breaker size for the hot water heater
How many watts? Your average residential 30 or 40 gallon water heater is 4500 watts and usually goes on a 30 A breaker.
InPhase277 is offline   Reply With Quote
Old 12-19-2008, 08:57 AM   #4
DIYer
 
Join Date: Oct 2008
Location: Virginia
Posts: 910
Rewards Points: 500
Default

Hot water heater Breaker????


The wire size of the circuit feeding it determines the breaker amps, not the water heater itself. Come on guys.
Gigs is offline   Reply With Quote
Old 12-19-2008, 09:04 AM   #5
Newbie
 
Join Date: Jul 2007
Posts: 16
Rewards Points: 10
Default

Hot water heater Breaker????


Ok if it is the wire size then. What wire size should I have cominy to the heater?
Bigbobdallas is offline   Reply With Quote
Old 12-19-2008, 09:09 AM   #6
Newbie
 
Join Date: Jul 2007
Posts: 16
Rewards Points: 10
Default

Hot water heater Breaker????


Ok if it is the wire size then. What wire size should I have coming to the heater?
Bigbobdallas is offline   Reply With Quote
Old 12-19-2008, 09:25 AM   #7
Member
 
Join Date: Dec 2007
Location: Baltimore, MD
Posts: 1,802
Rewards Points: 1,000
Default

Hot water heater Breaker????


Depends on the heater. We need a little more info. Nameplate rating, model number, ... A "standard" water heater would be a 30A breaker on 10/2 wire.
jerryh3 is offline   Reply With Quote
Old 12-19-2008, 09:25 AM   #8
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 2,000
Default

Hot water heater Breaker????


Quote:
Originally Posted by Gigs View Post
The wire size of the circuit feeding it determines the breaker amps, not the water heater itself. Come on guys.
Huh? The appliance manufacturer specifies the circuit ampacity, the appropriate breaker is installed, and the necessary wire size is installed based on the circuit ampacity. By your statement, he could theoretically use #14 wire and a 15 amp breaker on his water heater...And although I know that's not what you meant, it illustrates the point.

Bigbobdallas, check your water heater's manual or download the model's information from the manufacaturer's website. #10 wire and a 30 amp breaker is pretty common for residential water heaters, but not in every case. If you can't find that, provide the wattage information and as Inphase277 suggested, we can get you right in the ballpark.
Termite is offline   Reply With Quote
Old 12-19-2008, 09:29 AM   #9
Newbie
 
Join Date: Jul 2007
Posts: 16
Rewards Points: 10
Default

Hot water heater Breaker????


Thanks for all the info. When I get home tonight I will check this out.

I am not sure what it is but here in the last three or four days it has been flipping off ever so often and wife says it is hot.
Bigbobdallas is offline   Reply With Quote
Old 12-19-2008, 09:39 AM   #10
Member
 
Wethead's Avatar
 
Join Date: Oct 2008
Posts: 82
Rewards Points: 75
Default

Hot water heater Breaker????


What brand of water heater is it?
Wethead is offline   Reply With Quote
Old 12-19-2008, 09:41 AM   #11
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 2,000
Default

Hot water heater Breaker????


Then it is doing its job! Sounds to me like your breaker is undersized, which leads me to believe that there's possibly a wire size issue as well. Is it a new water heater???
Termite is offline   Reply With Quote
Old 12-19-2008, 09:43 AM   #12
Newbie
 
Join Date: Jul 2007
Posts: 16
Rewards Points: 10
Default

Hot water heater Breaker????


At the present time I can't remember. It is about 1 yr old and can't remember sorry.
Bigbobdallas is offline   Reply With Quote
Old 12-19-2008, 09:44 AM   #13
DIYer
 
Join Date: Oct 2008
Location: Virginia
Posts: 910
Rewards Points: 500
Default

Hot water heater Breaker????


Quote:
Originally Posted by thekctermite View Post
Huh? The appliance manufacturer specifies the circuit ampacity, the appropriate breaker is installed, and the necessary wire size is installed based on the circuit ampacity.
Yes, yes, but for all we knew he was eyeballing a 12/3 wire that ran near his water heater. I think it's an important distinction to make sure people understand the wire gauge determines the maximum overcurrent protection you can use. It may seem basic to us but maybe not to everyone asking questions here.
Gigs is offline   Reply With Quote
Old 12-19-2008, 12:19 PM   #14
Registered User
 
Termite's Avatar
 
Join Date: Apr 2008
Posts: 6,520
Rewards Points: 2,000
Default

Hot water heater Breaker????


I just don't want it to be convoluted into making the OP think that any wire is fine as long as the breaker is sized to for it. That's a backwards approach that could easily lead to dangerous mistakes. Start with the appliance and work toward the panel and you can't go wrong.
Termite is offline   Reply With Quote
Old 12-19-2008, 12:21 PM   #15
Idiot Emeritus
 
Join Date: Mar 2008
Location: Fernley, Nevada (near Reno)
Posts: 1,634
Rewards Points: 1,062
Default

Hot water heater Breaker????


Is this water heater a replacement for an older one? If so, the breaker and wire might be too small.

Years ago, it was not uncommon to have a 3000 or 4000 watt water heater fed with #12's and a 20 amp breaker. This was fine for these heaters, but most modern heaters are 4500 watts. They will trip a 20 amp breaker, and if a 30 is installed using existing wire, it'll eventually burn up the wire and likely start a fire.

A 4500 watt heater needs #10's and either a 25 or 30 amp breaker.

Rob

Advertisement

micromind is online now   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Electric Water Heater GTSRider Plumbing 31 12-07-2008 12:30 PM
Installing a Tankless Water Heater infoiam Plumbing 4 11-10-2008 10:59 PM
Water Heater Troubles deadguydrew Plumbing 9 10-19-2008 10:30 AM
Water source from fridge from water heater? dankreboot Plumbing 11 07-12-2008 11:08 PM
"sticky" gas water heater thermostat homer12 Appliances 8 01-25-2008 05:36 PM




Top of Page | View New Posts