Electric Hot Water Heater Replacement - 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 05-01-2010, 12:22 PM   #1
Member
 
Join Date: Feb 2010
Location: BC,Canada
Posts: 62
Rewards Points: 75
Default

Electric Hot Water Heater Replacement


Not sure if this should go in the plumbing section.

My electric water heater's tank is leaking and I'm looking for a replacement unit. Currently there is a 3000 Watt heater on a dedicated 20 amp circuit using 12 ga. wire.
I've been told that with today's code, water heaters of this size (37 gal, 3000+ watts) need a 30 amp circuit. I also read that heaters up to 3700 watt could be used on a 25 amp circuit with 12 ga. wire. but 25 amp breakers may not be available.
The 3000 watt heater we have is only just adequate for our needs and running a new service to this area of the house would be a pain.
All advice appreciated.

Advertisement

RalphPeters is offline   Reply With Quote
Old 05-01-2010, 12:35 PM   #2
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,976
Rewards Points: 2,208
Default

Electric Hot Water Heater Replacement


At 240 volts a 20 amp circuit could provide 4800 watts. However, since this is considered a continuous load the circuit is limited to 80% of the maximum. By my calculation that limits you to 3840 watts on a 12 gauge 240 volt water heater circuit.

Advertisement

brric is online now   Reply With Quote
Old 05-01-2010, 12:39 PM   #3
Member
 
Join Date: Feb 2010
Location: BC,Canada
Posts: 62
Rewards Points: 75
Default

Electric Hot Water Heater Replacement


Thanks
It would be nice if I could safely use a 3700 watt heater on this circuit.

Mfg. recommends 20 amp for 3000 watt and 25 amp 10 ga.for 4000 watt but doesn't specify for the 3700 they sell.
Attached Files
File Type: pdf ElectReq.pdf (17.0 KB, 97 views)

Last edited by RalphPeters; 05-01-2010 at 12:58 PM.
RalphPeters is offline   Reply With Quote
Old 05-01-2010, 12:43 PM   #4
Master Electrician
 
Join Date: Mar 2010
Location: Indiana
Posts: 2,976
Rewards Points: 2,208
Default

Electric Hot Water Heater Replacement


Just noticed you are in Canada. Perhaps some northern brethren have a better answer based on the Canadian regulations.
brric 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
selecting an electric water heater reds_21 Appliances 7 05-23-2009 02:48 AM
Testing 12 year old hot water expansion tank? DJfixer Plumbing 2 01-01-2009 09:09 AM
Replacing a Water Heater with Electric One 2031pratt Plumbing 3 12-26-2008 10:17 AM
Electric water heater (no hot water) heaterissue Plumbing 8 08-29-2008 01:16 AM
Electric Water Heater Problem mw2727 Plumbing 4 08-21-2008 02:51 PM




Top of Page | View New Posts