I sure am glad that electrician was there. Electricity is not my bag, but I learned enough from reading here that I could carry on a conversation with him...
Both of our rigs were at the end of a long line. He was in a 5'er with a 50 amp cord on a 30 amp adapter, I was on my 30 amp cord (what my trailer is rated for).
His voltage was more stable than mine with his heavier cord...
I think my next step may be pulling the power panel and tightening up the screws.
All this was a bit overwhelming to take in at once...
327RKS