Replacing water heater, have 20amp circuit

Reply

  #1  
Old 05-24-08, 11:18 AM
Member
Thread Starter
Join Date: May 2008
Posts: 3
Received 0 Votes on 0 Posts
Replacing water heater, have 20amp circuit

Hi folks - just wanted to bounce a few things off you for a sanity check.

I have a 20amp circuit and a really old water heater that is leaking ...and just needs to be replaced.

At this point I don't really want to change the wiring and breaker - and so I'm planning on buying a new water heater that can work within the 20A circuit limits. I've looked at the box and the breaker in there looks ok - 2 20A breakers, side by side tied together..and dedicated to the water heater.

The new water heater is a 240v, 3800W (single element) heater. The specs say is draws 15.8 amp ..which is actually 3792W so I'm assuming they just rounded up.

So here are my calculations (please review) that make me think this heater should be ok for my circuit - and not end up tripping the breaker.

I've read in another post that the NEC says the circuit / breaker and wiring must handle 125% of the load:
15.8 * 1.25 = 19.75A which is <20A.

This appears to be good to me. What are you opinions?
Thanks!
 
Sponsored Links
  #2  
Old 05-24-08, 02:00 PM
Member
Join Date: Mar 2006
Location: Wet side of Washington state.
Posts: 18,485
Received 28 Votes on 22 Posts
Yes, that is the proper calculation and the water heater is fine for the circuit.
 
  #3  
Old 05-24-08, 02:09 PM
Member
Thread Starter
Join Date: May 2008
Posts: 3
Received 0 Votes on 0 Posts
Thanks for your review!

Originally Posted by furd View Post
Yes, that is the proper calculation and the water heater is fine for the circuit.
 
Reply

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


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description:
Your question will be posted in: