tlnorco2003

Conductors in open air have a higher ampacity than you're accustomed to seeing. The utility company will have its own method of determining the correct sizing of the service drop wires. - Jim Katen, Oregon so i'll have to check with them to see if the current wire is suitable. thanks for the feedback. Jim

I have a neighbor that has a 100 amp Zinsco panel. He wants to upgrade to a new 200 amp panel. I know I have to use 2/0 wire up through the weatherhead for the 200 amps. My question is, The utility company's wire size appears to be either #1 or 1/0 wire. Is that wire sizing on their side enough for the 200 amps? I was told here in California that (SoCal Edison) the utility company only needs to use #1. Any feedback would be appreciated.