Because you are talking about an electrical outlet which is exterior to the rig, you should have a GFI circuit, or at least, tap into the GFI circuit of your bathroom outlet.
If you were standing on damp ground, or get wet touching anything electrical, electrical code states you must have GFI protection.
If not..........the results could be shocking!!!!!!!!!!!!
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Ken and Terry
2018 Sunseeker 2430S-CD, nicely modified and carried by a 2017 Ford E450 Sport
Former Georgetown 330TS owner for 10 years with more mods than I can count, pushed by our 2017 GMC Terrain