when up grading an exsisting service to a new service , i am trying to find what code says just how much past the service are you required to change over to new wiring vs leaving the existing wire alone. replaced new service drop , meter base , panel and used exsiting wire . the house has a sub panel , (fuse box) and inspector wants me to size wires from fuse box with new s fuses for the exsisting circuits to house. these circuits are all fused with 30amps and all circuits in fuse box are all single poles.
the wires look to be 12 ga. and if i fuse with 20amp wondering if fuses might start blowing because of how much these old circuits have on them.
owner says he has never had a problem before and house is over 70 yrs. old.
thanks for any input..
