Currently have a #12 wired 20amp circuit that feeds my washing machine outlet, sump pump,ceiling pull chain light, and the garage. Circuit has never blown in the 3 years that I own the house, but while having some work done a couple of days ago, my electrician suggested running a third wire in the conduit which would allow the garage to be a separate circuit. I am questioning the need and expense though.....the sump pump rarely turns on; the garage has two 100 watt motion sensor flood lights, electric door opener and outlet which is used for the lawn mower and hedge trimmer in summer. Any thoughts?