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 07-11-2012, 05:31 PM   #16
Licensed Electrical Cont.
 
Speedy Petey's Avatar
 
Join Date: Feb 2004
Location: NY State
Posts: 6,782
Share |
Default

Tankless water heater with 2 200 amp panels


I never read OPs close enough. I get caught up in the later discussions.

__________________
Sometimes I feel like if I answer any more questions it is like someone trying to climb over a fence to jump off a bridge and me giving them a boost.
Answers based on the 2008 & 2011 NEC. If you're on the '14 already I feel sorry for you.
Speedy Petey is offline   Reply With Quote
The Following User Says Thank You to Speedy Petey For This Useful Post:
k_buz (07-11-2012)
Old 07-11-2012, 05:32 PM   #17
E2 Electrician
 
stickboy1375's Avatar
 
Join Date: Apr 2012
Location: Litchfield, CT
Posts: 4,720
Default

Tankless water heater with 2 200 amp panels


Quote:
Originally Posted by Speedy Petey View Post
I never read OPs close enough. I get caught up in the later discussions.
I think were all guilty of that...
stickboy1375 is offline   Reply With Quote
Old 07-11-2012, 05:35 PM   #18
Licensed Electrician
 
k_buz's Avatar
 
Join Date: Mar 2012
Location: SE Wisconsin
Posts: 4,336
Default

Tankless water heater with 2 200 amp panels


Quote:
Originally Posted by stickboy1375 View Post
I think were all guilty of that...
Don't worry, there is always someone not too far behind to correct us....
__________________
__________________________________________________ ______________
Answers based on the National Electric Code. Always check local amendments.


k_buz is offline   Reply With Quote
The Following User Says Thank You to k_buz For This Useful Post:
stickboy1375 (07-11-2012)
Old 07-11-2012, 05:37 PM   #19
Newbie
 
Join Date: Jul 2012
Posts: 4
Default

Tankless water heater with 2 200 amp panels


Wow! I eat dinner and come back to see if there was one answer.... Not expecting this. Thanks everyone for the input.

Yes this is a fairly new home. The reason I wanted to split it is I did some quick math on the panel loads. With the split and assuming worst case scenario of adding the amperage on the various breakers I couldn't come up with a reasonable situation where I would exceed 170 amps on either panel. This is stove on, fridge/freezer, both heat pumps running with electric heat, and tankless going full out AND several rooms at full.


Ie: worst case theoretical scenario I still couldn't overdraw.


I honestly haven't pulled the cover to look inside so I'm not sure of the panels grounding. Each panel has its own 200amp main breaker.


I'm sorry for the confusion on my ground reference. I was referring to the tankless. It has three separate 50amp circuits (hot and neutral) and one ground. Their manual shows using hot neutral ground for one circuit and then hot and neutral for the other two. My background is digital low voltage not high voltage. I didn't THINK this would cause a problem but as it isn't my specialty.


As a result a was I was if there was any code reason or safety reason that the three circuits couldn't be separated. My next door neighbor had the same unit installed by a buddy who is an electrician. They installed all 3 50amp circuits on one panel. With one heat pump, fridge, stove, and the bathroom lights on he sees flickers. I figured we'd play it safe and split things across the two panels if that was allowable.


I REALLY appreciate everyone's input!
edentel is offline   Reply With Quote
Old 07-11-2012, 05:41 PM   #20
Newbie
 
Join Date: Jul 2012
Posts: 4
Default

Tankless water heater with 2 200 amp panels


Oh...and as for the gas comment. There is an easement but no gas in the neighborhood. We COULD go propane but it seems like too big a pain to work out the venting and install a larger tank just for the water heater and fireplace. The small 50 gal tank just won't do it for a heater.
edentel is offline   Reply With Quote
Old 07-11-2012, 05:42 PM   #21
Licensed Electrician
 
k_buz's Avatar
 
Join Date: Mar 2012
Location: SE Wisconsin
Posts: 4,336
Default

Tankless water heater with 2 200 amp panels


A fairly new house with 2 panels installed at the time of construction, I am going to assume the panels are grounded/bonded correctly.

There is no issue with using either or both of the panels to supply the 3 circuits.
__________________
__________________________________________________ ______________
Answers based on the National Electric Code. Always check local amendments.


k_buz is offline   Reply With Quote
Old 07-11-2012, 05:45 PM   #22
Newbie
 
Join Date: Jul 2012
Posts: 4
Default

Tankless water heater with 2 200 amp panels


Sorry tying to catch up with all the posts. K_buz the house does have cpvc for the water feed. Now I am curious. I'll have to pop the cover and take a quick glance inside. It hadnt stuck me that the panels may be grounded together internally.

Thanks again for all the input.

Last edited by edentel; 07-11-2012 at 05:50 PM.
edentel is offline   Reply With Quote
Old 07-11-2012, 07:45 PM   #23
E2 Electrician
 
stickboy1375's Avatar
 
Join Date: Apr 2012
Location: Litchfield, CT
Posts: 4,720
Default

Tankless water heater with 2 200 amp panels


Quote:
Originally Posted by edentel View Post
Sorry tying to catch up with all the posts. K_buz the house does have cpvc for the water feed. Now I am curious. I'll have to pop the cover and take a quick glance inside. It hadnt stuck me that the panels may be grounded together internally.

Thanks again for all the input.
You will see a jumper from one panel to the next...
stickboy1375 is offline   Reply With Quote
Old 07-11-2012, 08:03 PM   #24
Member
 
Missouri Bound's Avatar
 
Join Date: Apr 2011
Location: Almost Arkansas
Posts: 2,764
Default

Tankless water heater with 2 200 amp panels


Do you not have room for a standard water heater? I'm amazed how popular tankless have become despite their massive current draw on demand. Current tank type water heaters have so little heat loss and require 30 amp circuits....not 150 amps. I suppose I would use one as a last resort....if someone gave it to me.
__________________
Do you want it your way or the right way?
Missouri Bound is offline   Reply With Quote
The Following 3 Users Say Thank You to Missouri Bound For This Useful Post:
k_buz (07-12-2012), Speedy Petey (07-12-2012), stickboy1375 (07-12-2012)
Old 07-11-2012, 11:23 PM   #25
Member
 
Join Date: May 2012
Posts: 131
Default

Tankless water heater with 2 200 amp panels


I think op is a bit confused. Im willing to bet this unit doesnt draw 150 amps. Do you have the specific brand/model you're looking at? That will help make sure everybody is on the same page
Protocol. is offline   Reply With Quote
Old 07-12-2012, 07:41 AM   #26
Member
 
Join Date: Feb 2012
Location: Kansas
Posts: 81
Default

Tankless water heater with 2 200 amp panels


Quote:
Originally Posted by Protocol. View Post
I think op is a bit confused. Im willing to bet this unit doesnt draw 150 amps. Do you have the specific brand/model you're looking at? That will help make sure everybody is on the same page
Why do you think that?

M Engineer is offline   Reply With Quote
Reply

Tags
tankless water heater


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
Tankless hot water heater during winter when water shut off jdabs Plumbing 3 07-10-2012 12:50 AM
REplacing water heater - PV, DV, or Tankless? curls00 Plumbing 5 12-09-2010 12:21 PM
water heater drip kdange1 Plumbing 5 05-04-2010 03:24 PM
Need to run gas line to Tankless Water Heater. anonymouscuban Plumbing 2 04-16-2010 02:56 PM
Tankless water heater - NEED HELP! LakersFreak Plumbing 39 11-16-2008 08:49 AM




Top of Page | View New Posts

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