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

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

Reply
 
Thread Tools Search this Thread Display Modes
Old 11-13-2011, 11:41 AM   #1
Newbie
 
Join Date: Nov 2011
Posts: 1
Share |
Default

Electric Water Heater


Can I connect a 240/208-50Gal.-Electric Hot Water Heater to exsisting wiring (once used for a dual electric oven) 2 joined 30amp breakers (60amp total) or is this overkill and/or dangerous?

UAUSA is offline   Reply With Quote
Old 11-13-2011, 11:50 AM   #2
Electrical Contractor
 
jbfan's Avatar
 
Join Date: Jun 2004
Location: Newnan GA
Posts: 5,740
Default

Electric Water Heater


You do not have 60 amps, you have a 2 pole 30 amp breaker, and that is fine for the water heater.

__________________
Yes I am a Pirate, 200 years too late. "Jimmy Buffett"
jbfan is offline   Reply With Quote
Old 11-13-2011, 12:49 PM   #3
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Default

Electric Water Heater


Quote:
Originally Posted by UAUSA View Post
Can I connect a 240/208-50Gal.-Electric Hot Water Heater to exsisting wiring (once used for a dual electric oven) 2 joined 30amp breakers (60amp total) or is this overkill and/or dangerous?
A 4500W element at 240V pulls 19A and presents a 13 ohm load. You'll need this info if you ever have to troubleshoot this setup. And with 240V there is some arc-flash danger.
Yoyizit is offline   Reply With Quote
Old 11-13-2011, 01:05 PM   #4
liscenced electrician
 
Join Date: Jul 2008
Location: Oregon coast
Posts: 983
Default

Electric Water Heater


Quote:
Originally Posted by jbfan View Post
You do not have 60 amps, you have a 2 pole 30 amp breaker, and that is fine for the water heater.
Thats one really annoys me. I don't know how many times i explain it to my father in law, he still doesn't get it. Explain it simply, explain it in depth, doesn't matter.



you have 30 amps at 240v. This is not the same as 60amps of 120v or 60 amps of 240. A 30 amp breaker is a 30 amp breaker, no matter how many phases
jimmy21 is online now   Reply With Quote
Old 11-13-2011, 01:18 PM   #5
I=E/R
 
a7ecorsair's Avatar
 
Join Date: May 2010
Location: Minnesota
Posts: 2,052
Default

Electric Water Heater


Quote:
Originally Posted by jimmy21 View Post
you have 30 amps at 240v. This is not the same as 60amps of 120v or 60 amps of 240. A 30 amp breaker is a 30 amp breaker, no matter how many phases
And there is that phase term. It is single phase at 240 and single phase at 120

As far as the 240 volt circuit, tell him the breakers are in series. You have 30 amps through one and it is the same 30 amps that flows through the other.
a7ecorsair is offline   Reply With Quote
Old 11-13-2011, 01:28 PM   #6
liscenced electrician
 
Join Date: Jul 2008
Location: Oregon coast
Posts: 983
Default

Electric Water Heater


Quote:
Originally Posted by a7ecorsair View Post
And there is that phase term. It is single phase at 240 and single phase at 120
i realize that, but i think everyone still uses terms like "phase a and phase b" or "phase to phase." Even though its still single phase. Also, my statement of "A 30 amp breaker is a 30 amp breaker, no matter how many phase" isn't just residential. Still applies with 480v 3 phase breakers
jimmy21 is online now   Reply With Quote
Old 11-13-2011, 01:28 PM   #7
Member
 
Join Date: Jul 2008
Location: NW of D.C.
Posts: 5,990
Default

Electric Water Heater


Quote:
Originally Posted by jimmy21 View Post
I don't know how many times i explain it to my father in law, he still doesn't get it. Explain it simply, explain it in depth, doesn't matter.
This means that, over a long time, you have accumulated knowledge in an area that most people are ignorant of, and you don't know how much knowledge you have accumulated.
It has become second nature to you.

After high school you may not assume that others know what you know, or even that they are capable of understanding what you tell them.
I had to work in a hardware store for a while and I was amazed that many people of any age did not understand how the current can flow from a battery, through a wire and light a little bulb.
Worse, some people who work with electricity have the most bizarre notions of what is really happening. This, because it seems to fit what they are observing.

Maybe it's because the flow of current is invisible.

Dunno'.


Last edited by Yoyizit; 11-13-2011 at 01:39 PM.
Yoyizit is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Solar "Batch" Hot Water Heater, Help Please Ralph III Green Home Improvement 1 10-29-2011 09:12 PM
Pressure drop across water heater, low hot water flow HVAC_NW Plumbing 2 01-17-2011 10:43 PM
Solar hot water indatom123 Green Home Improvement 0 12-19-2010 12:01 AM
electric water heater rewire dghowery Electrical 6 10-13-2010 05:06 PM
Periodic release from (I think) the T&P valve on the water heater alexz Plumbing 3 08-15-2006 10:31 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.