Note: I am not a licensed electrician
Note: I am not a licensed electrician. I made these diagrams and conclusions by verifying each electrical path with a VOM (Volt-Ohm Meter with a continuity tester). For your safety, you must satisfy your self that these diagrams are valid for your wiring.
Male 30 Amp Plug
O Ground (green)
\\ //
Neutral Hot
(white) (120v, black)
===================================
Female 30 Amp Receptacle
O Ground (green)
\\ //
Hot Neutral
(120v, black) (white)
==================================
50 Amp Plug or Receptacle
||| Neutral (white)
|| ||
Hot 120v Hot 120v
O
Ground (green)
Neutral to either HOT = 120V giving two separate legs @ 120V 50A each
HOT to HOT = 240V This option is NOT used in any trailer that I know. It is used for the 240V electric dryer and kitchen range/oven in your stick home.
When you use a 30/50 Amp pigtail to connect to a 50 Amp camper, the two hot connections are joined at the 50Amp end of the pigtail. You can verify this using a VOM and verify continuity between the hot at the 30 Amp end and the hots at the 50 Amp end. Also you can verify continuity between the two hots at the 50 Amp end.
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