Thread Tools Display Modes
Old 02-06-2020, 09:28 AM   #1
Junior Member
Join Date: Feb 2020
Posts: 2
Convertor experts please help

Hi there, I just got a pre-owned travel trailer, 2003 Wildcat 29BHS, everything so far seems to be working well electrically. I was checking the convertor to see what this trailer came with and noticed the "main" 120v breaker is only a 20/20 amp split breaker. Does this seem right. I see many of the newer replacement units have a 30/20 split breaker. My trailer does have a 30 amp cord. Any help or insights are appreciated. I've attached a photo of the unit.

Thanks, JT

Click image for larger version

Name:	IMG_20200129_161806084.jpeg
Views:	117
Size:	91.8 KB
ID:	222920
PA77 is offline   Reply With Quote
Old 02-06-2020, 09:35 AM   #2
Pickin', Campin', Mason
5picker's Avatar
Join Date: Aug 2015
Location: South Western PA
Posts: 12,478
It sure seems as though it was replaced as every one I've seen like that have had a 30a side of the breaker for the main and a 20a side for the A/C.

2016 Flagstaff 8529IKBS Diamond Package 5th Wheel-Goodyear Endurance Tires
2017 Ford F-Series SCREW 4x4 - Factory Puck B&W Companion
TST Tire Monitor w/Repeater - Sinemate 3500w Gen.

Days Camped: '17=30 '18=51 '19=58 '20=88
5picker is offline   Reply With Quote
Old 02-06-2020, 09:35 AM   #3
...far N Georgia!
formerFR's Avatar
Join Date: Jan 2017
Location: Hiawassee, GA!
Posts: 3,142
It does seem odd that it would not be a 30/20 tandem breaker rather than two 20s since the air conditioner alone is on 20... I wonder if a previous owner swapped it out after some issue and installed the incorrect size 'Main Breaker'?

but, other older trailer owners might have more knowledge of whether this is 'normal' for that timeframe, or not...

also, regardless of whether you have a 30amp shore cord and are plugged into a 30amp RV service outlet, this 20amp Main Breaker will continue to limit you to 20amps at 120v of power usage.
formerFR is offline   Reply With Quote
Old 02-06-2020, 09:55 AM   #4
Senior Member
Join Date: Feb 2017
Location: SW Ohio
Posts: 1,050
I would unplug the unit and remove that cover to see what is there. It is possible they couldn't find the correct breaker and bypassed it some how. Which could be worse then limiting you to 20 amps.
TT 2017 Flagstaff 831CLBSS Classic Ultra lite
TV 2017 F150 6.5' bed 3.5 Eco-boost
prior TV 2014 Silverado 2500 HD
llr is offline   Reply With Quote
Old 02-06-2020, 10:25 AM   #5
Head Rambler
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 8,134
That power panel normally comes with a 30/?? amp main breaker. Normally a 30/15 or a 30/20. My guess is that the original owner or some repairman was having trouble with it and they couldn't find a 30/20 so they just installed what they could find.

Open up the panel and if everything is intact (wiring etc.) just get a 30/20 tandem breaker and replace that 20/20.
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 02-06-2020, 11:59 AM   #6
Junior Member
Join Date: Feb 2020
Posts: 2
Thank you for the quick responses, much appreciated. I am glad to hear that this doesn't look correct to others, I will remove the cover and see what is going on. I guess it is possible this convertor was replaced at one time and these were the only breakers they could find.
PA77 is offline   Reply With Quote
Old 02-06-2020, 05:18 PM   #7
Senior Member
Bluepill's Avatar
Join Date: Jun 2015
Location: Pensacola, FL
Posts: 1,645
Code requires the following size wiring as minimum:

15 AMP = 14 Gauge
20 Amp = 12 Gauge
30 AMP = 10 Gauge

If the wire size feeding the left side portion of the 20/20 breaker (From the 30 AMP "Shore Power" input) is obviously thicker than all the other wires that connect to the other breakers, then it is probably 10 gauge and you can use a 30 AMP breaker for that circuit.
2019 Coachmen Freedom Express 192RBS
2015 T12RBST Flagstaff Hardside

Disclaimer: The actual value of my "Two Cents" of advice varies just like a bitcoin.
Bluepill is offline   Reply With Quote

Thread Tools
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

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.

All times are GMT -5. The time now is 01:33 AM.