bob b
- A ground
- A neutral
- Line 1
- Line 2
A household 220V plug doesn't have a neutral.
You are correct, the 220V isn't used, just the two 120V phases, each with 50 apm capacity. Here's the Link to show how the plugs are wired. (scroll down a page to see.)
If you have a 220 V kiln, you may be able to tap Line 1 and Line 2 to get the 220 V to a plug. Just watch your total load.
John, Winnebago Minnie 24V
You are correct, in that you have a 240 volt service with a Neutral and a Ground, thus givin you two separate 120 Volt 50 Amp legs.
Regarding running your Welder or the like; yes, you could tap off the two hot legs in your breaker panel, and install a dedicated 240 volt service in one of your bays. Be advised however, all the loads in the RV will also be using the 50 amp service, so you would have to take those into consideration, in addition to the load of your 240 volt accessory.
If I were attempting to do what you describe, I would just wire the 240 volt accessory up with a standard 50 Amp RV plug, and when I wanted to use it, I would unplug the RV and plug in the accessory.
This way, you stand no chance of having an overload/low voltage and possible damage to electrical assets withing the RV.
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Quote:
Your 50 Amp plug is not the same as a household 220V plug. It has 4 pins:
A household 220V plug doesn't have a neutral.
Current codes, at least in my area, now call for 4 wires in 220 receptacles for ranges and dryers. A 30 AMP 4 wire for the dryer, 50 AMP 4 wire for ranges. I know the 30 AMP house circuit is different than a MH outlet but is the 50 AMP 4 wire home circuit that is commonly used now the same as the ones used in CG's?
Your 50 Amp plug is not the same as a household 220V plug. It has 4 pins:
- A ground
- A neutral
- Line 1
- Line 2
A household 220V plug doesn't have a neutral.
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Take a look at this site or put; 250 Volt, 50 Amp AC Wiring into Google and see what come up. Sure helped me understand.
The current NEC 30 amp dryer receptacle is a 14-30R.
You can see the them here. Note that this site does not show the 30 amp RV connector - the receptacle is a TT-30R, and the plug is a TT-30P. (FWIW, in the ANSI/NEMA list, TT is for Travel Trailer.) You can also see the "old" residential plugs/receptacles for the dryers and ranges that only had three pins.
They are commonly available, and you can get short cords with the plug and terminals for either the range or dryer.
bob b - your AC distribution panel may not accept the double pole breakers; some of the newer ones do as the high end units may have a 240 volt dryer or range. But it should handle up to 50 amps on each leg; and you'd have to "manage" your power use if you connected the welder receptacle to the RV AC panel. If you have an EMS, it could have problems doing it's job if you don't have the welder included in it's programming.
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I intend to take a couple of electric wheels and a kiln on the road in my enclosed trailer and set up mobile lessons. Bob
Quote:
Current codes, at least in my area, now call for 4 wires in 220 receptacles for ranges and dryers. A 30 AMP 4 wire for the dryer, 50 AMP 4 wire for ranges. I know the 30 AMP house circuit is different than a MH outlet but is the 50 AMP 4 wire home circuit that is commonly used now the same as the ones used in CG's?
Current codes, at least in my area, now call for 4 wires in 220 receptacles for ranges and dryers. A 30 AMP 4 wire for the dryer, 50 AMP 4 wire for ranges. I know the 30 AMP house circuit is different than a MH outlet but is the 50 AMP 4 wire home circuit that is commonly used now the same as the ones used in CG's?
They are the same in the sense that all are 240V single phase with a common neutral and a ground. Typically the dryer uses a plug and the range is hard wired.
As pointed out many times very few RVs have 240V devices. One reason for this is the limited availability of 50A CG service. But the 50A circuit provides additional 120V power for hair dryers, water heaters, ACs, etc. When plugged into the 30A RV plug (single 120V circuit) you are more limited on power consumption.
I'd be interested in knowing what type of plug the 4 wire 30A OR code specifies.
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Bob
Most of the potter's wheels I've seen have fairly small motors, so they shouldn't be a problem. Kilns are another story with a wide range of power requirement depending on size and the final temp rating. Except for some very small ones, they all seem to take 240 volts. What are the power requirements of the one you plan to take?
Oh, and don't forget about venting that kiln, and having a way to get the heat out of the small space. I'm sure it's doable, just thought I'd mention it if you hadn't thought of it.
Mel