Power Plug Adapter Question
I find myself in a bit of a bind for a brief upcoming weekend trip, without the proper adapter for a generator. My power cord is the standard 4-blade RV 50amp plug. I have the 50amp RV female to 30a...
Forum Discussion
10forty2 wrote:
I have the standard RV 4-blade 50amp plug on my rig that normally supplies power when plugged in. On that plug, I understand that there are 2 120VAC hot leads, one ground and one neutral. The generator is a Honda 3000iU that has a 30amp/120VAC female twist lock outlet. I need to adapt the 50amp 4-blade RV plug down to the 30amp 120VAC twist lock that has 3 blades.
So, again, do I tie the neutral and ground together from the 50amp plug to the single ground blade on the 30amp twist lock, and run the separate hot leads (one each) to each of the other blades on the 30amp twist lock plug?
No. The 30A twistlock has a neutral, a ground, and a single hot. The neutral from the 50A socket goes to the neutral on the 30A plug. The ground from the 50A socket goes to the ground on the 30A plug. The two hots from the 50A socket are tied together and go to the single hot on the 30A plug.
Alternately, you could connect a 30A RV receptacle to a 30A twistlock plug (with like contacts wired together, of course) and use your 30A to 50A adapter along with it. The net effect would be the same.
If you have an EMS, you may need to bond the neutral and ground at the generator to make the EMS happy.
