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01-06-2011, 03:11 PM
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#1
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Junior Member
Join Date: Jan 2011
Posts: 23
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Is it possible to convert a 30A coach to 50A?
I am most likely going to be picking up a 98 Discovery in the next week or two. One thing that I noticed about this coach is that it only has a 30A electrical system. I was wondering how hard would it be to convert it to 50A? I would assume that this would require a new Automatic Transfer Switch and another main line run from the ATS to the electrical panel, and then a rewire of the electrical panel, but what else would need to be done? I havent looked close at the gen (Onan 6.5 I believe) but it should already have two legs on it shouldnt it? Has anyone done this conversion (30A to 50A)?
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01-06-2011, 04:16 PM
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#2
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Junior Member
Vintage RV Owners Club Solo Rvers Club
Join Date: Jan 2011
Location: Pueblo, Colorado
Posts: 6
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50 Amp Upgrade
My advice is to leave it alone and reassess your need for your electrical demands. Messing with the system is costly and unlike a house your MH is a vehicle with its own quirks. Its relatively easy to change out the breaker box or simply put a bigger amp breaker in the existing one if the box is rated for 50 amps but do you really need it?
It would be easier to run a single additional 20 amp line from the outside hookup source to a permanent or semipermanent inside outlet. $30 and you're done without touching the MH's system components. Plus you have a spare power source if the main one goes down.
Best,
Wolf Wickham
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01-06-2011, 04:54 PM
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#3
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Senior Member
Join Date: Aug 2008
Location: Georgia
Posts: 8,638
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I would not change electrical I had a 30amp winni found wire that ran back air put in a double pole double throw switch added a power cord then I could run both airs at Same time not just one
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2007 Fleetwood Revolution LE 40V
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01-06-2011, 05:05 PM
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#4
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Administrator in Memoriam
Newmar Owners Club Retired Fire Service RVer's Spartan Chassis
Join Date: May 2000
Location: Newark, DE
Posts: 25,898
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There is at least one recent thread on this topic and a search will find it.
50 amp power cord
new transfer switch
#6 wire from xfer switch to the new panel
That's the big stuff.
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Adios, Dirk - '84 Real Lite Truck Camper, '86 Wilderness Cimarron TT, previously 4 years as a fulltimer in a '07 DSDP
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01-06-2011, 05:17 PM
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#5
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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It can be converted, or adapted. If you have an automatic transfer switch, it is a bit more complicated and costly.
Talk to your local area RV dealers and get quotes to get the rear A/C up and running.
Ken
__________________
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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01-06-2011, 06:27 PM
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#6
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Senior Member
Damon Owners Club Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 24,024
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To answer your question: Yes it is possible.
A better question: Is it practical? The answer is "perhaps"
Things that need to be changed.. NOTE: Some are options and may not be installed.. Some (highlighted) are "mandatory"
POWER CORD,
Power inlet
Auto-former
Auto (or manual) Transfer switch
Generator (May or may not need to change)
BREAKER BOX
energery management system
Surge suppressor/power line guard/monitor
And ALL THE WIRES connecting the above items.
The breakers and the wires from the breaker box to the loads you can likely re-use.
Of course if you do not have a generator. then you don't have an ATS, if you don't have the other lower case stuff. you don't worry about it either.
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Home is where I park it!
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01-06-2011, 07:29 PM
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#7
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Senior Member
Winnebago Owners Club Texas Boomers Club Freightliner Owners Club
Join Date: Jul 2006
Posts: 929
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Quote:
Originally Posted by wa8yxm
To answer your question: Yes it is possible.
A better question: Is it practical? The answer is "perhaps"
Things that need to be changed.. NOTE: Some are options and may not be installed.. Some (highlighted) are "mandatory"
POWER CORD,
Power inlet
Auto-former
Auto (or manual) Transfer switch
Generator (May or may not need to change)
BREAKER BOX
energery management system
Surge suppressor/power line guard/monitor
And ALL THE WIRES connecting the above items.
The breakers and the wires from the breaker box to the loads you can likely re-use.
Of course if you do not have a generator. then you don't have an ATS, if you don't have the other lower case stuff. you don't worry about it either.
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I did it. I needed to replace the power cord, main breakers, wires from the transfer switch to the breaker panel. I reused everything else (transfer switch, breaker panel, etc.).
There was quite a bit of rewiring required. If you're not comfortable with 220 volts wiring, you should have someone else do it.
There are a number of threads about this. A search should get them for you.
__________________
Michael
2017 Allegro Bus 45OPP, Cummins ISL 450, Allison 3000
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01-09-2011, 08:48 AM
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#8
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Senior Member
Winnebago Owners Club Ford Super Duty Owner Carolina Campers
Join Date: Dec 2002
Location: Murphy, NC, USA
Posts: 1,117
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HI,
My suggestion would be to leave well enough alone. If the RV came with 30 amps than leave it that way as I'm sure the RV manufacturer knows what they are doing.
I have a 2004 Winnebago and it has 30 amp which is sufficent to power everything in the RV including a heat pump. When I draw more than 30 amps then my inteligent panel cuts things off automatically.
Electrical systems are nothing to play with unless you know all there is to know about current, wire size and how the wires are run. Be careful!
__________________
2014 Winnebago Adventurer 35P,Ford F-53, V-10
2011 Ford Escape,2000 Roadmaster Tow Dolly
"Have a Great Day, Enjoy RVing."
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01-09-2011, 09:07 AM
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#9
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Senior Member
Gulf Streamers Club Ford Super Duty Owner
Join Date: Jul 2010
Location: Golden Village Palms, CA
Posts: 1,988
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D-N-Tyke,
I had the same concern as you and found a solution I am very happy with and cost about $100.00 plus a couple hours of my time. I added a 20 amp dual power adapter and am using it right now as we speak (or type)
I tapped into my unused 20 amp circuit and powered it with a 15 amp line.
It runs my second a/c unit or in winter it runs my rear electric heater on shore power or with generator.
Here is a link to the thread with details how I installed it.
__________________
John
'98 Gulf Stream Sunsport 325, 7.5L Banks Power Pack, Koni FSD's, Air Bags, ReadyBrute Elite,
2000 Honda Accord
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01-10-2011, 10:38 PM
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#10
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Registered User
Monaco Owners Club
Join Date: May 2009
Posts: 3,198
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Fleetwood coaches of that era had a very sophisticated power management system. My pace Arrow will happily run both A/C's, all the lights, and even the microwave, all on 30 amps. The system sheds loads when you draw too much power, but it's automatic and not noticeable. Nothing ever stops, the a/c's keep the coach cool, and it never blows the campground's 30 amp breaker.
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