Originally Posted By: Dennis Bozek
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Also remember Steve, unless the wires coming into the meter are underground, the ampacity of the wires are rated for more when strung overhead in “free air”. Because they are in free air, they are less likely to get hot because of no conduit restricting the cooling of these wires. The table that Rocky refers to will have a section for conductors at 600 volts or less in free air.
If the conductors look small to you for 100 amps, it is best to either recommend a electrician or even the utility company who will typically send out an engineer to determine if the "loop" wires are proiperly sixed for the service.
The wires coming overhead are commonly referred to as the "loop" wires.
This information has been edited and reviewed for errors by your favorite resident sparky.