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Old 05-26-2017, 02:30 PM   #1
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50 amp 120v or 240v

My family up north is putting a 50 amp plug for our rv and the electrician asked 120v or 240v how do I find that out or do we need to find another electrician who knows what they're doing
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Old 05-26-2017, 02:35 PM   #2
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I think most of the responses will echo the suggestion of finding an electrician who knows the wiring for a 50 amp RV plug because it is quite specific
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Old 05-26-2017, 02:40 PM   #3
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Quote:
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My family up north is putting a 50 amp plug for our rv and the electrician asked 220v or 240v how do I find that out or do we need to find another electrician who knows what they're doing
Find another electrician.
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Old 05-26-2017, 02:46 PM   #4
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Find a better electrician. 220 is 2 - 110 volt lines minimum voltage. 240 is 2 max. Volt lines. The terms are used together. The wiring is the same 2 hot legs on the side a ground on the top . The ground is round. The 3rd prong is flat and on the bottom. This plug is the same as an electric range plug.
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Old 05-26-2017, 03:39 PM   #5
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Quote:
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My family up north is putting a 50 amp plug for our rv and the electrician asked 120v or 240v how do I find that out or do we need to find another electrician who knows what they're doing


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Old 05-27-2017, 12:32 AM   #6
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I would find another electrician, but if you stick with this guy tell him 120/240 4 wire and show him the diagram listed above.
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Old 05-27-2017, 03:54 AM   #7
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There is no " RV " 240 volt 50 amp service. There is just 240 volt 50 amp service.

Plug a big air compressor, electric welder, electric range or your RV in and all is well.

120 volt, 30 amp " RV " service is another story, but not what we're talking about here.

Find a real electrician, this guy may be a helper working under someones license.

http://www.myrv.us/electric/Pg/50amp_Service.htm

The 50-amp*120/240-volt*3 pole 4 wire grounding Service

This*50-amp*service*has 4 wires with two 120-volt HOT feeds.*It is a*misconception*that this 50-amp RV service is something special.*This service is a STANDARD 120/240 50-amp 3 pole with 4 prongs used for*numerous*applications.*
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Old 05-27-2017, 04:21 AM   #8
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There is no " RV " 240 volt 50 amp service. There is just 240 volt 50 amp service.

Plug a big air compressor, electric welder, electric range or your RV in and all is well.

120 volt, 30 amp " RV " service is another story, but not what we're talking about here.

Find a real electrician, this guy may be a helper working under someones license.

The 50-amp 120/240-volt 3 pole 4

The 50-amp*120/240-volt*3 pole 4 wire grounding Service

This*50-amp*service*has 4 wires with two 120-volt HOT feeds.*It is a*misconception*that this 50-amp RV service is something special.*This service is a STANDARD 120/240 50-amp 3 pole with 4 prongs used for*numerous*applications.*


Next he'll be asking if it needs to be three phase.
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Old 05-27-2017, 01:25 PM   #9
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A 50A outlet for an RV is two 120VAC 50A circuits! If he hooks it up for 240 you will probably burn up everything in your rig! Either get another electrician that is familiar with this hookup or get the correct wiring diagram to give to this one!

http://www.myrv.us/Imgs/PDF/50-amp%20Service.pdf

http://rv52.com/nice-50-amp-receptacle-voltage-diagram/
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Old 05-27-2017, 02:01 PM   #10
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wonder where and how he got his license...
run, get a real electrician!!
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Old 05-27-2017, 02:31 PM   #11
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Actually the question by the electrician was not that far off base...a 50 amp 120v service is quite doable (and useless). What he needs to see is the business end of a 50 amp RV plug. Then he will know what is needed to serve this RV. The real danger is when an "electrician" wires a 30 amp RV outlet with 220v.
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Old 05-27-2017, 02:50 PM   #12
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Maybe the OP's interpretation of what his folks interpretation of what the electrician was asking wasn't clear. Just send him the schematic he will be fine.
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Old 05-27-2017, 03:14 PM   #13
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Happy Camper--the "standard" warning you are referring to relates to using a 30 amp dryer plug [two 30 amp legs]. Attempting to re-wire dryer for RV 30 amp use will result in 120v being sent down the neutral to the RV--resulting in the magic white smoke--if you don't have a good "surge" protector.....
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Old 05-27-2017, 03:32 PM   #14
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If you are referring to your family 'putting in a 50a plug' as an extension from your home Breaker box, a 50a double pole breaker to insert into the house Main breaker box, the appropriate heavy gauge wire to run from the house to the rv area, and a 50a RV 'box', which is where the RV plugs into. It's pretty simple.

I ran ours without issue. I had place for a 50a double pole breaker in the Main box, connected the heavy duty 50a cable(heavy!) from the breaker, out the Main box, and eventually outside to the 50a RV box mounted on the wall.

The 50a double pole breaker simply provides two separate 120v lines to the RV plug, which in turn provides two separate lines into the coach - 50amps on each line, giving the coach a maximum of 100amps total.
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