6-30R
6-50R
The straight 240 volt 30 and 50-amp Service looks like this. It uses a 30 OR 50-amp Double pole Breaker with Two Hot leads and a Ground. NO NEUTRAL
| The straight 240-volt Welder Service. |
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The 30 and 50-amp 240-volt 2 pole 3 wire Grounding |
Not for RV |
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6-30R |
6-50R |
The straight 240 volt 30 and 50-amp Service looks like this. It uses a 30 OR 50-amp Double pole Breaker with Two Hot leads and a Ground. NO NEUTRAL |
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| Welder Service is not the same as the OLD Appliance
Service. Both are 3-wires but the OLD Appliance use 2 Hot and Neutral the
Welder use 2 Hot and Ground. NEMA 6-30R or 6-50R
In a straight 240-volt circuit like an electric hot water heater or a welder there is no need for a neutral return. All of the energy is absorbed and used up by the elements and the welder. The Ground is VERY important for a welder to work. In case of a short in the welder's transformer/rectifier the current would quickly go straight to ground and hopefully trip out the 30 or the 50 amp breaker from overload. The above straight 240-volt would also work on the electric stove and dryer except they need the 240-volt for the dryer and stove's heating elements and the 120-volt to run the dryer motor and the controls on the stove so they need the neutral wire. (See the Appliance Service on the left) |
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DO NOT ATTEMPT TO MAKE AN ADAPTOR to plug into a 6-30R or 6-50R Welder Service. There is NO NEUTRAL in this service. |
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| Converting the Welder (6-30R or 6-50R) service over to a 30-amp 120-volt RV service Remove the Double pole breaker and replace it with a Single pole 30-amp breaker. This service requires 3 wires 1 Black (Hot lead) 1 White (Neutral) and 1 Ground. One of the hot wires will have to be made into Neutral wire. Use white tape to identify it for future reference. Install a TT-30R receptacle and its ready to go. |
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| Converting the WELDER 6-50R
(50-amp) 240-volt Service to a 14-50R 50-amp RV outlet.
Since
the welder service comes with 3 wires (2 HOT 1 Ground) an extra wire for
the Neutral must be pulled for a 50-amp
120/240-volt
3 pole 4
wire grounding Service for an RV. The 50-amp breaker is
the same, install a new 14-50R 3 pole 4 wire grounding receptacle
and the extra WHITE wire.
Converting the WELDER 6-30R (30-amp) 240-volt Service to a 14-50R 50-amp RV outlet the wire size must meet the 50-amp requirements. Replace the 30-amp double pole breaker with a 50-amp double pole breaker. Follow the direction above for the rest. Both of the above 50-amp conversions will supply 2 - 50-amp lines or 12,000 watt power to the RV. If the 30-amp 240 Welder Service wire size doesn't meet the 50-amp wire size ALL new wires must be pulled or make it into a 30-amp 120/240-volt service. This is the SAME service as the 50-amp Service above with 4 wires except it will have 2 - 30-amp lines or 7200-watt power to the RV. This service would be preferred in a 50-amp coach to the single line 120-volt 30-amp service. Use the 30-amp Double pole breaker already installed.
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14-30R