Hello,
I am at my brother-in-law's place and he has a Welder 3-prong outlet box, which doesn't match my 4-prong 50 Amp cable.
But we exchanged that outlet box for a 4-prong that will plug in. However, (without it being plugged into the RV end), my Power Surge Protector lit up an Error indicating the 'Neutral wire' was missing.
...What should we do now?

Thanks, Craig E.