Good Sam Club Open Roads Forum: Run Both Air Conditioners with 30-amp service
Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Posting Help and Support  |  Contact  

Search:   Advanced Search

Search only in Do It Yourself Modifications a...

Open Roads Forum  >  Do It Yourself Modifications and Upgrades (DIY)

 > Run Both Air Conditioners with 30-amp service

Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
Son of Norway

Denver, Colorado

Senior Member

Joined: 10/12/2011

View Profile



Good Sam RV Club Member

Offline
Posted: 07/11/18 12:56pm Link  |  Quote  |  Print  |  Notify Moderator

This is a project for those of you camping in hot weather in an older motorhome with 2 air conditioners but only 30 amp service. As you know, you can only run one AC at a time while on pedestal power. I have posted and puzzled about this and this is the easiest and cheapest way that I could come up with to deal with the problem. It is to install a switch in the generator compartment to choose between generator power and pedestal power.

It takes a 3 position, 4 row, 16 connector AC rotary cam switch. (Amazon) Also a 3" extra deep box, an extra deep box extension, weatherproof cover, some 10 gauge wire, a length of 10 gauge extension cord, a three prong plug and a thirty-amp plug.

The job is pretty straightforward. Determine which wire is which. Label then disconnect the wires, Take out the old box. Install the new one. Run the wires and cords in. Wire the switch, wire the plugs. Close up the box and make it pretty.

This is a view of the wiring and the switch:

[image]

This is a view with the two cords:

[image]

I will hang the cords on a hook at the side. The switch requires jumpers on the house side. Be sure and test the logic of the switch for yourself before wiring.

It is nice to finally have a cool RV. I have a window AC that I used to use but now I can put it on Craigslist.


Miles and Darcey
1989 Holiday Rambler Crown Imperial
Denver, CO


2oldman

Salton Sea

Senior Member

Joined: 04/15/2001

View Profile


Online
Posted: 07/11/18 12:58pm Link  |  Quote  |  Print  |  Notify Moderator

You mean you run both airs on generator, or one on shore and one on generator?

Son of Norway

Denver, Colorado

Senior Member

Joined: 10/12/2011

View Profile



Good Sam RV Club Member

Offline
Posted: 07/11/18 01:01pm Link  |  Quote  |  Print  |  Notify Moderator

This is to run both AC and whatever else while on shore power, or use generator power for the AC's and whatever else as usual. The switch only allows you to use one type of power at a time.

2oldman

Salton Sea

Senior Member

Joined: 04/15/2001

View Profile


Online
Posted: 07/11/18 01:04pm Link  |  Quote  |  Print  |  Notify Moderator

Ok. I guess you're good unless your wiring heats up.

Mandalay Parr

Phoenix, AZ

Senior Member

Joined: 07/09/2004

View Profile



Good Sam RV Club Member

Offline
Posted: 07/11/18 01:11pm Link  |  Quote  |  Print  |  Notify Moderator

I run both on 30 amps but not too much else.


Jerry Parr
Full-time
2005 Mandalay 40B
Cat C7 350, 4 Slides
Blue Ox, Brake Buddy
2004 CR-V Toad
[email protected]
602-321-8141
K7OU - Amateur Radio
Kenwood Radios
ARRL, W5YI, & LARC VE
SKYWARN Weather Spotter

time2roll

Southern California

Senior Member

Joined: 03/21/2005

View Profile



Good Sam RV Club Member


Posted: 07/11/18 01:15pm Link  |  Quote  |  Print  |  Notify Moderator

Do I assume your RV was wired to where the second A/C only ran from the secondary generator circuit? The switch must just tie this circuit into the main 30 amp cord.

Or are you running a second cord out to the 20 amp GFI circuit?


2001 F150 SuperCrew
2006 Keystone Springdale 249FWBHLS
675w Solar pictures back up

Son of Norway

Denver, Colorado

Senior Member

Joined: 10/12/2011

View Profile



Good Sam RV Club Member

Offline
Posted: 07/11/18 01:57pm Link  |  Quote  |  Print  |  Notify Moderator

Right, the 20 amp generator circuit only powers the 2nd Ac. For this set-up you run 2 cords to the pedestal. One 30 amp and one 20 amp. The circuits are kept separate up to the pedestal.

MrWizard

Traveling

Moderator

Joined: 06/27/2004

View Profile



Posted: 07/11/18 02:36pm Link  |  Quote  |  Print  |  Notify Moderator

elegant solution some people use male and female 20amp sockets and plugs to break the circuit and run the extension cord to the pedestal or connect it to the generator

this ties in with a generator power discussion in another thread
the second A/C on the 20amp HACR breaker on the genset
is totally isolated from the 30a main service for the house
that 20amp circuit does not 'aid/help' the house side, even when the second A/C is not being run, there is NO power cross connection between the circuits


Radiate The Happy
....

Connected using Verizon and AT&T
1997 F53 Bounder 36s


ScottG

Bothell Wa.

Senior Member

Joined: 02/25/2005

View Profile


Offline
Posted: 07/11/18 02:36pm Link  |  Quote  |  Print  |  Notify Moderator

Any time I've run just one AC on 30A my plug/ receptacle has gotten at least warm (even with new trailer). I have to wonder how often this would actually work.


Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins.
2018 Silver Fox 32A.
H0NDA eu2000i

Dutch_12078

Winters south, summers north

Senior Member

Joined: 10/07/2008

View Profile



Good Sam RV Club Member

Offline
Posted: 07/11/18 02:41pm Link  |  Quote  |  Print  |  Notify Moderator

I would like to give appropriate credit for the picture below, but I do not remember who originated it. My thanks to them anyway!

[image]
[image]Click For Full-Size Image.


Dutch
2001 GBM Landau 34' Class A
F53 chassis, Triton V10, TST TPMS
Bigfoot Automatic Leveling System
2011 Toyota RAV4 4WD/Remco pump
ReadyBrute Elite tow bar/Blue Ox baseplate


Reply to Topic  |  Subscribe  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Do It Yourself Modifications and Upgrades (DIY)

 > Run Both Air Conditioners with 30-amp service
Search:   Advanced Search

Search only in Do It Yourself Modifications a...


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:

© 2018 CWI, Inc. © 2018 Good Sam Enterprises, LLC. All Rights Reserved. | Terms of Use | PRIVACY POLICY | YOUR PRIVACY RIGHTS