Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
 


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 06-25-2022, 03:43 PM   #1
1 Rivet Member
 
1993 25' Excella
Saint Louis , Missouri
Join Date: Aug 2020
Posts: 11
Best circuit to tie in electric water heater

Hi there,

Our 1994 Excella Classic came with a gas-only water heater. I've installed a newer gas/electric Atwood model, but now I'm wondering where the best place is to connect the electrical. It's a 30 amp trailer.

Do you think I should:

a) tie into the same circuit as the microwave and try not to run the microwave while the water heater is heating

OR

b) tie into the receptacles circuit and not run a space heater or tea kettle while the water heating is heating

OR

c) something else (including not connecting it to the electric, though that would be a bummer)
Thorasaurus is offline   Reply With Quote
Old 06-25-2022, 03:47 PM   #2
Site Team
 
GCinSC2's Avatar

 
2007 30' Classic S/O
Somewhere , South Carolina
Join Date: Apr 2010
Posts: 5,962
Have you looked at the various AC wiring diagrams for your trailer?

My 2007 has a dedicated 15A breaker marked water heater. What wattage is your new heater and does the water heater manual have any wiring requirements?

Gary
__________________
S/OS #001 2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Dexter 4 Piston Disc Brakes, Carslile Actuator, Equal-I-Zer, Dill TPMS. Campfire cook. BMV-712. DEMCO 21K Lb Cast Iron coupler
GCinSC2 is offline   Reply With Quote
Old 06-25-2022, 04:02 PM   #3
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 12,385
Images: 5
I would look into running a dedicated circuit. It may not be as hard as it sounds. I don't know your layout, but on my rear bedroom the breaker box is overhead in the rear. My water heater circuit runs from there down to the floor and then runs along the floor in a carpeted "chase" to the bathroom and there is the water heater. Point is, not all circuits run between the inner and outer skin and a bit of disassembly gets you there
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Old 06-25-2022, 04:32 PM   #4
1 Rivet Member
 
1993 25' Excella
Saint Louis , Missouri
Join Date: Aug 2020
Posts: 11
Quote:
Originally Posted by GCinSC2 View Post
Have you looked at the various AC wiring diagrams for your trailer?

My 2007 has a dedicated 15A breaker marked water heater. What wattage is your new heater and does the water heater manual have any wiring requirements?

Gary
It would use 13.5 amps when heating. I don't have the original water heater diagram but I should definitely check out the trailer diagram.
Thorasaurus is offline   Reply With Quote
Old 06-25-2022, 04:34 PM   #5
1 Rivet Member
 
1993 25' Excella
Saint Louis , Missouri
Join Date: Aug 2020
Posts: 11
Quote:
Originally Posted by dznf0g View Post
I would look into running a dedicated circuit. It may not be as hard as it sounds. I don't know your layout, but on my rear bedroom the breaker box is overhead in the rear. My water heater circuit runs from there down to the floor and then runs along the floor in a carpeted "chase" to the bathroom and there is the water heater. Point is, not all circuits run between the inner and outer skin and a bit of disassembly gets you there
Yeah, mine run from the overhead compartment through the skin to the floor and I don't know how hard it will be to get it through the skin. I guess my thinking is that if the maximum is 30 amp for the trailer then having a dedicated circuit wouldn't really change much because it would still blow one of the breakers if everything kicked on at once, but maybe I'm not thinking about that correctly.
Thorasaurus is offline   Reply With Quote
Old 06-25-2022, 04:44 PM   #6
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 12,385
Images: 5
Quote:
Originally Posted by Thorasaurus View Post
Yeah, mine run from the overhead compartment through the skin to the floor and I don't know how hard it will be to get it through the skin. I guess my thinking is that if the maximum is 30 amp for the trailer then having a dedicated circuit wouldn't really change much because it would still blow one of the breakers if everything kicked on at once, but maybe I'm not thinking about that correctly.
True, but I'll still bet that run down to the floor in back can be fished pretty easily. There's no inner skin nor ribs in the top of the clamshell....but there may be some skin, and definitely a horizontal rib at the beltline. My trailer has an access compartment on that side of the trunk...where the wiring all comes down from above.
Might be worth a try.

Sent from my SM-G950U using Airstream Forums mobile app
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Old 06-25-2022, 04:53 PM   #7
Rivet Master
 
dznf0g's Avatar
 
2007 30' Classic
Oswego , Illinois
Join Date: Jul 2010
Posts: 12,385
Images: 5
Your idea of using the microwave circuit would work. My old Prowler had just that setup....but....a switch was in the circuit which forced me to chose one or the other. Idiot proof.

Sent from my SM-G950U using Airstream Forums mobile app
__________________
-Rich-

"If the women don't find you handsome, they should at least find you handy." - Red Green
dznf0g is offline   Reply With Quote
Old 06-25-2022, 05:43 PM   #8
Site Team
 
richard5933's Avatar

 
1994 25' Excella
Waukesha , Wisconsin
Join Date: Sep 2020
Posts: 2,887
Images: 4
Motor homes of the era had a small transfer switch to choose between a few devices, such as water heater, a/c, etc.

Assuming your 1994 is set up like mine, you could easily put a small manual transfer switch in the overhead cabinet with the breakers, and then run a line down to the water heater under the bed.

I'd use the breaker feeding the microwave like you suggest, having it go to the new transfer switch and then on to both.

Probably not room in the breaker panel for another breaker, but if there is you could go that route instead.
__________________
Richard
11018
1994 Excella 25 Follow the build on Gertie!
1999 Suburban LS 2500 w/7.4L V8
1974 GMC 4108a - Custom Coach Land Cruiser (Sold)
richard5933 is offline   Reply With Quote
Old 06-26-2022, 08:13 PM   #9
1 Rivet Member
 
1993 25' Excella
Saint Louis , Missouri
Join Date: Aug 2020
Posts: 11
Thanks all! I think I will look to add a junction box under the rear bunk and tie into the microwave circuit. It does already have the switch to prioritize either microwave or A/C but this would come before that switch. Either way, shouldn't matter; just need to try to not run the Microwave while the water heater is heating.

Appreciate the brainstorming! Happy camping!
Thorasaurus is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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
Water Heater runs on Gas/Electric with electric switch on CoastieJohn Water Heaters, Filters & Pumps 3 04-02-2019 06:56 PM
Electric Water Heater upgrade trips circuit breaker KJAir Water Heaters, Filters & Pumps 8 06-11-2015 12:03 PM
Water pump tie in? Kiera Water Heaters, Filters & Pumps 1 03-18-2015 07:17 PM
Atwood LP/Electric Water Heater Problems (Electric Has Failed) gquake Water Heaters, Filters & Pumps 10 06-29-2014 03:02 PM
hook ups for water tank , pump and tie ins batt Fresh Water Systems 3 10-03-2010 07:10 PM


Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by the Airstream, Inc. or any of its affiliates. Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.



All times are GMT -6. The time now is 06:06 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.