Portable Surge protector

[JRTJH]

There are a lot of variables in your question that aren't covered.

1. What protection is there on that 50 amp plug? Is there a 50 amp breaker or is it simply a plug wired to another supply?

2. What else in that doublewide is powered by the plug? Possibly, only the residential refrigerator was on at the time, but what about the water heater, cooking range/oven, heat/AC??? Those items can (and probably will) overload a 50 amp connection. Most doublewides with gas appliances have at least a 100 amp main panel, doublewides with electric water heaters/cooking appliances usually have 200 amp main panels. Attempting to run that doublewide AND your trailer on a single 50 amp source is going to be woefully inadequate.

3. Depending on how that 50 amp plug is wired and how your "50 amp Y" is wired, you may (or may not) have a phasing issue with your trailer shore power cable. Changing the plug to work with your trailer may cause issues with the doublewide, so make sure any "physical wiring changes" consider both "end users".....

Can you make it work? Certainly, that's a yes. But you may have limitations that make it impractical. Look at the "big picture" of running two houses on a single 50 amp plug...... That's not an ideal situation.