Thanks for your responses.

LK - I was concerned with wire sizes because we have not yet determined what would be torn out. Also, I will want to determine if the service entrance wires (from mast head to meter) are sized for 100a. Sometimes, even where the service was 60a, the wire installed was capable of carrying 100a.

Andy - thanks. I was wondering if there was some sort of caliper for measuring wire, and since you mention a micrometer I guess that answers my question. But i never heard of a micrometer. Where would I find one? Do people still even use these?

Thanks again, folks.