How is a 120v only generator connected to the gen input of an automatic transfer switch in a 50 amp coach? Is the hot lead from the 120v gen simply connected to (and shorted across) both the L1 and L2 hot leads of the ATS?

Depends on the genset.Some gensets have a 120/120 neutral and ground twist lock setup.Others have a 30 three wire 120 volt twist lock receptacle.

I'm interested in the electrical connection, not the mechanical plug/socket connection. The 50A ATS has two input hot leads at its gen input, L1 and L2. The 120v gen has only one hot lead at its output (which could be connected to multiple receptacles). Is that single gen hot lead normally electrically connected to short across both L1 and L2 at the ATS input?

if the generator has a single output then yes generator input L1 & L2 will be bonded on the TS.

You would need to get the correct adapter to go from the three wire 120 output to go to the rig's 50 amp 120/240 connector. Yes L1 and L2 are connected together.

are you 'wondering' about the built in generator is wired in a 50 amp coach ?that generator has two outputs, and is wired to the genset input exactly like the50amp shore cord is wired on its set of inputsNO,, there is no shorting or connecting the two hot wiresthat only occurs in a 50a female to 30a male dog bone adapter for shore power usemost RV generators have two 120v outputseven a 4kw genny in an RV with a 30amp shore cord and breakersone input will go directly to the house circuitsthe other will handle the A/C unit and maybe minor bedroom or bathso the house circuit can handle the kitchen, MW , fridge etc

Connect 120v Gen to 50Amp ATS? | Good Sam Community

time2roll
Nomad
Feb 01, 2017
if the generator has a single output then yes generator input L1 & L2 will be bonded on the TS.
DryCamper11
Explorer
Feb 01, 2017
I'm interested in the electrical connection, not the mechanical plug/socket connection. The 50A ATS has two input hot leads at its gen input, L1 and L2. The 120v gen has only one hot lead at its output (which could be connected to multiple receptacles). Is that single gen hot lead normally electrically connected to short across both L1 and L2 at the ATS input?
enblethen
Nomad
Feb 01, 2017
Depends on the genset.
Some gensets have a 120/120 neutral and ground twist lock setup.
Others have a 30 three wire 120 volt twist lock receptacle.

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Connect 120v Gen to 50Amp ATS?

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