RV Hookup

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skorper

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Orange County, California
I have a customer that needs an RV Hookup installed on his outside garage wall. It needs to be 220V, 1Ph, 30A. I have never installed one of these before. Does it need to be GFCI and if so, can I use a "Spa" GFCI box? I can't find anything specific for RVs in the NEC. Thanks guys!
 
skorper said:
I have a customer that needs an RV Hookup installed on his outside garage wall. It needs to be 220V, 1Ph, 30A. I have never installed one of these before. Does it need to be GFCI and if so, can I use a "Spa" GFCI box? I can't find anything specific for RVs in the NEC. Thanks guys!
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I haven't hooked one of these up either, however, I have seen an nice pre-made "RV outlet box" at Lowes that you may want to check out. It was 30 amp, 120 volt and has the special RV receptacle in it ready to go. It is not required to be GFCI protected.
 
Many RVs that use 240V 30a use traditional NEMA receptacles. See if you can find out what the NEMA number is. My guess is it's a dryer receptacle (14-30).
 
CW1263-BOX-EA-2.jpg



Picture of the last RV receptacle I installed, 125v, 30 amp... I just used a bell box with a really deep bubble cover...I would double check the voltage with the RV....
 
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skorper said:
Are you sure a GFCI is not needed? It is also 220V not 120V. I don't have a local AHJ to ask. (Not until final inspection.)
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Why would you need GFI? its not a 15 or 20 amp receptacle... Also, I've never seen a 240v RV so you'd better double check the cord configuration for that RV your hooking up.
 
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stickboy1375 said:
Picture of the last RV receptacle I installed, 125v, 30 amp... I just used a bell box with a really deep bubble cover...I would double check the voltage with the RV....
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Not a NEMA number, but many times called a TTL-30 receptacles.

skorper said:
Are you sure a GFCI is not needed? It is also 220V not 120V. I don't have a local AHJ to ask. (Not until final inspection.)
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GFI requirements only apply to 120v-volt, 15- and 20-amp receps, not 30.
 
stickboy1375 said:
Also, I've never seen a 240v RV so you'd better double check the cord configuration for that RV your hooking up.
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We have alot of the big ones stored in the family warehouse complex. They plug into a 30 or 50 amp 240 receptacles. They run on 50 when they keep the heat and air on all the time. 30 is just to maintain things. Heaven forbid someone had to step into cold RV in winter time.

c2500

And it is really funny when the morons crank everything up when hooked to a 30 amp plug.

They also have alot of adapter pieces available (from what I can tell) to hook to different plugs..3 vs 4 wire.
 
For the dogs.

For the dogs.

This RV is actually one of those 12 passenger or so mini busses. The owner just uses it to transport his show dogs. The power is just to maintain the AC for doggie comfort.
 
skorper said:
It needs to be 220V, 1Ph, 30A. QUOTE]

Not possible. It is either 30 amps, 120 volts, or 50 amps, 240 volts. The RV does not actually use 240 volts, but a 50 amp RV will utilize a standard 4 wire 50 amp 240 volt receptacle just like a range uses. The RV panel will distribute 120 volts to all it's loads, regardless of whether it is plugged into 120 or 240. Whatever you do, don't wire a 30 amp 3 wire RV hookup to 240, you will damage the RV. A 30 amp RV hookup is NOT the same as a dryer plug, and is ALWAYS wired for 120 volts.
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monkey said:
skorper said:
It needs to be 220V, 1Ph, 30A. QUOTE]

Not possible. It is either 30 amps, 120 volts, or 50 amps, 240 volts. The RV does not actually use 240 volts, but a 50 amp RV will utilize a standard 4 wire 50 amp 240 volt receptacle just like a range uses. The RV panel will distribute 120 volts to all it's loads, regardless of whether it is plugged into 120 or 240. Whatever you do, don't wire a 30 amp 3 wire RV hookup to 240, you will damage the RV. A 30 amp RV hookup is NOT the same as a dryer plug, and is ALWAYS wired for 120 volts.
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True, the recep like the one in the photo above is 120V. But the last RV I hooked up used a standard dryer recep. It only used on leg of the 240v. This is why RVs don't have 240V loads.... they are all 120V.
This is also why RV stores have all those adaptors to go from one voltage/amperage configuration to all the others. I've seen a 240v/50a to 120v/15a cord that will plug a 50a RV cord into a 15a receptacle.
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480sparky said:
monkey said:
True, the recep like the one in the photo above is 120V. But the last RV I hooked up used a standard dryer recep. It only used on leg of the 240v. This is why RVs don't have 240V loads.... they are all 120V.
This is also why RV stores have all those adaptors to go from one voltage/amperage configuration to all the others. I've seen a 240v/50a to 120v/15a cord that will plug a 50a RV cord into a 15a receptacle.
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That must be a strange RV, was it old? They must have an adapter to plug into most of the RV parks.
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Most RV's are strictly 120V, but some of the high-end rigs do have some 240V appliances. Of course the 240V loads won't work if the coach is plugged into 120V shore power, but the big coaches use so much power that they really need a 50A shore power supply anyway.
 
skorper said:
Are you sure a GFCI is not needed? It is also 220V not 120V. I don't have a local AHJ to ask. (Not until final inspection.)
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Yes I am sure.

In general only 125 volt 15 and 20 amp receptacles are required to have GFCI protection.
 
Ready to get scared ? They make adapters to go from that 240/50 to single pole 30 and then from the 30 to a 20 amp 120.So now we have someone in a tent posabbly runing a fan on a cord and fused at 50.
 
Surprised nobody mentioned the "Midwest Box". NEMA 3R weatherproof while In-Use box with RV receptacle included for about 25 bucks. Regular stock item at the supply houses I shop at.

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