What is this

Could anyone please tell me what the white wire in the photo is for please.

IMG_2157 (WinCE).JPG

Nice Drip Loop!

What drip loop!!!

Looks like a lightning arrestor mounted to the service mast.

I question this installation’s legality. Maybe this is a common method in your area.

Thanks speedy, and no it is not common

lol…guess they did not want to put it at the panel…lol