A home experienced a surge due to a downed power line.
The surge traveled through the branch circuit that feeds a 110 volt gas dryer and other receptacle outlets on the same circuit(it is an older city home without a dedicated laundry circuit) and resulted in an arc from the dryer receptacle to the nearby gas line. No fire, just soot marks.
The insurance company wants to know if the branch circuit wiring is compromised.
Using a megger, I get 250,000 ohms
(1/4 megohm) between hot & ground.
I believe the rule of thumb is 1 megohm plus 1 more megohm for every 1,000 volts.
I think I should recommend replacement of the branch circuit wiring.