Hello all, I need help figuring out why a friends outlets aren't working short of trying to replace them all. About two months ago she tried putting in an AC unit in her bedroom, according to her it worked for maybe 10 minutes then it went out taking out all the outlets in her room and the adjacent room with it. The first thing I thought of was she tripped a circuit but alas none were tripped not were any gfci's. But also another room and a bathroom across the hall run on the same breaker and they both have power. I then thought maybe she just burned up that outlet so I replaced it this afternoon with out any luck. So now I am stuck scratching my head out of ideas. Any input or thoughts would be greatly appreciated. Thanks in advance.

I have a outdoor grill and fire pit fed with natural gas flexible gas line.Customer is worried about lightning striking and gas explosion.What is the proper way to ground?