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05-15-2019, 05:50 PM
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#1
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Established Member
Join Date: May 2019
Location: Pinson
Posts: 32
M.O.C. #24049
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New Owner 50 amp question.
There are some answers that are really discussions on 50 amp service and go into to much theory.
Simple answer please
Is a 50 amp 2007 Montana 220 volts? YES OR NO.
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05-15-2019, 05:57 PM
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#2
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Montana Master
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,811
M.O.C. #10552
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You must be a lawyer you want a simple answer but have rules for the answer.
Please someone who knows more correct me.
But as I understand it RV 50 amp is two legs of 120 volts. Not to be confused with a typically 220 line like for your dryer or stove.
__________________
Wayne and Ann Moore
2015 Ford F-350 King Ranch
Firestone air bags, bed saver.
Add 40 GAL tank in bed.
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05-15-2019, 06:06 PM
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#3
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Established Member
Join Date: May 2019
Location: Pinson
Posts: 32
M.O.C. #24049
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The ac female plug on the wall has 4 terminals. 1 is 110. another is 110. Which is 220 v.
The other 2 are ground and neutral.
That really is like a dryer I believe but does this sound correct?
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05-15-2019, 06:20 PM
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#4
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Montana Fan
Join Date: Jan 2018
Location: Boone
Posts: 311
M.O.C. #21011
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You have two legs (wires) of 120 volts. And they are kept separate, unlike your house where they can be put together to make 220v with the correct double pole breaker. Nothing in or on your RV is 220 volts.
__________________
2018 Montana HC 362RD
2016 Chevrolet 3500 Duramax HD SRW
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05-15-2019, 06:24 PM
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#5
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Established Member
Join Date: May 2019
Location: Pinson
Posts: 32
M.O.C. #24049
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oK SO i GET A DOUBLE THROUGH 50 AMP BREAKER. i HAVE 4 WIRES IN IT AND I WIRE IT WITH 2 110V LEGS AND LET THE MONTANA AT THE OTHER END TAKE CARE OF WHATEVER IT DOES WITH 220 RUNNING INTO IT CORRECT?
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05-15-2019, 06:25 PM
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#6
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Montana Master
Join Date: Aug 2018
Location: Minden - NV
Posts: 501
M.O.C. #22360
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Quote:
Originally Posted by russgarrett
There are some answers that are really discussions on 50 amp service and go into to much theory.
Simple answer please
Is a 50 amp 2007 Montana 220 volts? YES OR NO.
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No and yes.
Nothing in the trailer is set up for 220V from the factory. That's not to say you couldn't add a tandem breaker and pull 220V on each leg of a real 4-wire 50A cord. If you use a 30A to 50A "dog bone" that shares the single leg of the 30A to each leg of the 50A on the same phase, what ever you wired to be 220V won't work as there's no potential difference on the two hots.
__________________
2013 F350 Lariat Ultimate CC LB
2019 3790RD
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05-15-2019, 06:27 PM
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#7
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Montana Fan
Join Date: Jan 2018
Location: Boone
Posts: 311
M.O.C. #21011
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And reading your post a second time, I got thinking. If you are referencing the cord and maybe adapting your residence to plug in while at home,PLEASE, study on that really careful. Hundreds of owners fry everything inside their RV when doing this incorrectly. It’s a simple mistake. I recommend a licensed electrician, they have insurance for this.
__________________
2018 Montana HC 362RD
2016 Chevrolet 3500 Duramax HD SRW
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05-15-2019, 06:32 PM
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#8
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Established Member
Join Date: May 2019
Location: Pinson
Posts: 32
M.O.C. #24049
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OK. sO i AM GOING DOWN STAIRS AND WIRE 2 110 WIRES ON THE 4 PRONG JACK AND EVERYTHING WILL BE FINE?
OR IS 1 110 WIRE AND CONNECT IT TO A 50 AMP PLUG OK IF NOTHING IS 110 IN THE TRAILER. i AM WANTING TO PUT IN A 2ND AC UNIT AND I WAS TOLD THAT YOU WOULD NEED 50 AMP FOR THAT ESPECIALLY IF YOU RUN A MICROWAVE AND A HAIRDRYER.
DOES IT MATTER EITHER WAY IS OK AS LONG AS IT HAS A 50 AMP BREAKER IN THE BASEMENT OF THE HOUSE?
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05-15-2019, 06:36 PM
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#9
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Montana Master
Join Date: Jul 2010
Location: Lake Havasu City AZ.
Posts: 1,811
M.O.C. #10552
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If you continue with this you will have a very short Life expectancy. Get a license electrician to do this for you.
__________________
Wayne and Ann Moore
2015 Ford F-350 King Ranch
Firestone air bags, bed saver.
Add 40 GAL tank in bed.
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05-15-2019, 06:38 PM
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#10
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Montana Master
Join Date: Aug 2018
Location: Minden - NV
Posts: 501
M.O.C. #22360
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Quote:
Originally Posted by russgarrett
OK. sO i AM GOING DOWN STAIRS AND WIRE 2 110 WIRES ON THE 4 PRONG JACK AND EVERYTHING WILL BE FINE?
OR IS 1 110 WIRE AND CONNECT IT TO A 50 AMP PLUG OK IF NOTHING IS 110 IN THE TRAILER. i AM WANTING TO PUT IN A 2ND AC UNIT AND I WAS TOLD THAT YOU WOULD NEED 50 AMP FOR THAT ESPECIALLY IF YOU RUN A MICROWAVE AND A HAIRDRYER.
DOES IT MATTER EITHER WAY IS OK AS LONG AS IT HAS A 50 AMP BREAKER IN THE BASEMENT OF THE HOUSE?
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To wire your house correctly for a NEMA 14-50 receptacle, you need a 2-pole 50A breaker. That will automatically put each hot wire on separate phases. I wouldn't f around with it if you don't understand electricity.
__________________
2013 F350 Lariat Ultimate CC LB
2019 3790RD
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05-15-2019, 06:40 PM
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#11
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Montana Master
Join Date: Mar 2019
Location: Milwaukie, OR
Posts: 1,467
M.O.C. #23668
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I'm thinking that if you aren't sure...don't do it. It's too risky and potentially expensive. Be safe and hire a licenced electrician.
__________________
Jeff & Sandi (and Teddy - 7lb Schnorkie)
2018 Montana HC 305RL / HW Progressive EMS
2015 RAM 3500 Laramie Longhorn Crew Cab 4x4 DRW / Demco Recon Hitch on RAM Puck Ball
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05-15-2019, 06:42 PM
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#12
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Montana Fan
Join Date: Jun 2018
Location: Holladay
Posts: 209
M.O.C. #22087
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Please call a licensed electrician.
__________________
2019 HC 381TH
2021 Ram 3500 6.7 HO
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05-15-2019, 06:45 PM
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#13
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Established Member
Join Date: May 2019
Location: Pinson
Posts: 32
M.O.C. #24049
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I have even wired rental houses so I can do it. Just don't know why the plug on the wall is wired for 220 but the trailer is 110.
The question was based on the trailer I just need to make sure it is supposed to get 220.
Apparently it is.
I will get it done
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05-15-2019, 07:02 PM
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#14
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,657
M.O.C. #9969
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Houses are exactly the same, you have Two 120 lines coming into your house, L1 and L2. All your normal lights and outlets are connected to either L1 or L2, but if you have an Electric Range or Electric Dryer, they are connected across L1 and L2 via a Double pole breaker to give them 240 Volts. A 50 amp RV is just the same, except that normally there isn't anything that needs 240, so all the outlets, appliances, etc are connect to either L1 or L2 because they only need 120 volts, but you do have a total capacity of 100 amps (50 amps on each leg).
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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05-15-2019, 07:08 PM
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#15
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Montana Fan
Join Date: Jun 2018
Location: Holladay
Posts: 209
M.O.C. #22087
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It's not so much that it is wired for 220 but that it has 2 110. The wiring in the RV keeps the two separate and will not make 220. One leg powers one side of the fuse box and the other leg powers the other side. If you use only one 110 line then you will only power half of the trailer.
__________________
2019 HC 381TH
2021 Ram 3500 6.7 HO
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05-15-2019, 07:09 PM
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#16
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Montana Master
Join Date: Nov 2015
Location: Arlington
Posts: 1,522
M.O.C. #18081
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Quote:
Originally Posted by russgarrett
The ac female plug on the wall has 4 terminals. 1 is 110. another is 110. Which is 220 v.
The other 2 are ground and neutral.
That really is like a dryer I believe but does this sound correct?
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Except in your RV there is no 220V load. Unlike the dryer motor in your house. Production RV's generally use a split bus panel. Each side of the panel only has access to a single leg of the 120V supply. Both legs however use the supply neutral for all loads. That is as simple as I can make based upon what I am reading in subsequent threads.
master electrician
__________________
SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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05-15-2019, 07:15 PM
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#17
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Site Team
Join Date: Aug 2007
Location: Omaha
Posts: 6,750
M.O.C. #7560
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Russ, if you hook or wire the panel wrong you will send 220 to your rig and you will blow and burn up every electronic circuit, all electronic equipment and appliance in the unit and could possibly catch your new unit on fire and the insurance company and Keystone will do nothing for you because you think you know what you are doing. Please don't gamble and get a licensed electrician that knows how to wire circuits for an RV.
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05-15-2019, 08:35 PM
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#18
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Montana Master
Join Date: Oct 2006
Location: McKinney
Posts: 7,155
M.O.C. #6433
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There is nothing special about it. It is essentially the same as your house. There is 240 vac coming in on two separate 120 vac split phase lines. Read the info on the link below.
http://www.myrv.us/electric/
Everything in your rig uses 120 vac. But some people have added a 240 vac clothes dryer.
__________________
Bill & Patricia
Riley, our Golden
2007 3075RL (recently sold, currently without)
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05-15-2019, 08:35 PM
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#19
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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Quote:
Originally Posted by russgarrett
There are some answers that are really discussions on 50 amp service and go into to much theory.
Simple answer please
Is a 50 amp 2007 Montana 220 volts? YES OR NO.
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So to answer your question! NO it is no 220. 
__________________
Bob & Carol Washington St
2017 HC HM352RL 2018 Dodge 3500 laramie CC LB 4x4
Curt Q25 with puck system, Factory air bags
Happy Trails 
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05-15-2019, 08:51 PM
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#20
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Montana Master
Join Date: Nov 2012
Location: Rancho Santa Margarita
Posts: 633
M.O.C. #13025
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__________________
Russ and Linda, So. California
2004 Chevy Silverado 2500 HD, D/A, SRW, SB
2005 2955RL, Pullrite Superglide 16K hitch. Bridgestone Duravis R500 tires. EZ Flex Equilizers with wet bolts.EMS HW50C, Disk brakes
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