Author Topic: 30 amp shore power - Dual AC upgrade question  (Read 143 times)

0 Members and 1 Guest are viewing this topic.

Offline Evildodge

  • New Poster
  • **
  • Posts: 5
  • Member since: 2022
  • I own a: No
  • Year: 1987
  • Model: Fleetwood Bounder
  • Chassis: P30
  • Engine: 454
30 amp shore power - Dual AC upgrade question
« on: May 22, 2022, 10:15 PM »
In restoring my 87 Fleetwood I replaced both of the original AC units with high efficiency, 13.5kw Houghton soft start heat pumps. They run great off of the Emerald 4k generator with power to spare, but my stock electrical panel has a selector switch that only allows the front or rear ac to operate at a time and not both, which is a problem. My new units draw notably less power than the originals, so is it possible to bypass that switch or do I need to upgrade my entire service to a 50 amp to support it?

If a full upgrade is required, does anyone have any recommendations for components?

Offline eXodus

  • Top Post Contributor
  • *****
  • Posts: 547
  • I own a: a Motor Home
  • Year: 2003
  • Model: Trail Lite
  • Chassis: Chevy P32
  • Engine: 350 Vortec
Re: 30 amp shore power - Dual AC upgrade question
« Reply #1 on: May 28, 2022, 05:23 AM »
you should measure amps of each unit.  If each unit draws less then say 12A when running full blast. That should be fine for 30A service.
You can certainly go in the main panel - open that selector switch and run the line of the second A/C unit to another breaker.

Still be aware - when you have both units running - and you start the Microwave you will most likely trip the 30A breaker.

I've put myself a sticker on the Microwave on button  "A/C running?" 
It's really the only downside of running on 30A service that you have to be a bit more conscious about your power use

Offline Oz

  • Top Post Contributor
  • *
  • Posts: 4076
  • Member since: 2002
  • I own a: Winnebago
  • Year: 1974
  • Model: D24 Indian
  • Chassis: Dodge
  • Engine: 440-3
Re: 30 amp shore power - Dual AC upgrade question
« Reply #2 on: May 28, 2022, 01:37 PM »
Good tip on the microwave usage!  :)ThmbUp

Offline Evildodge

  • New Poster
  • **
  • Posts: 5
  • Member since: 2022
  • I own a: No
  • Year: 1987
  • Model: Fleetwood Bounder
  • Chassis: P30
  • Engine: 454
Re: 30 amp shore power - Dual AC upgrade question
« Reply #3 on: June 12, 2022, 09:55 PM »
As an update for anyone else interested in doing so, I was able to successfully bypass that awful selector switch and am happy to report I can now run both my Houghton 13.5 units AND my microwave at the same time, all on a 30 amp service :)

Offline Oz

  • Top Post Contributor
  • *
  • Posts: 4076
  • Member since: 2002
  • I own a: Winnebago
  • Year: 1974
  • Model: D24 Indian
  • Chassis: Dodge
  • Engine: 440-3
Re: 30 amp shore power - Dual AC upgrade question
« Reply #4 on: June 13, 2022, 08:10 AM »
Awesome! Glad that worked.  :)