Fred B
Senior Member
- Location
- Upstate, NY
- Occupation
- Electrician
I get a call from a contractor working at a home that I changed out a breaker box on a few months back. He had a breaker that kept tripping when he used his brick saw. I get there and check circuit, existing wireing, no changes to circuit, by all appearances good. Was 15A Siemens AFCI with trip diagnostic feature that indicates an overload. So I open panel and meter circuit no loads on circuit that tripped, voltages on panel within 0.9 volt L1-N to L2-N with all other potential loads on, 120-240 single phase, voltage on question circuit within that tolerance, breaker off no metered shorts, so I have the Mason hook up the saw while I had amp meter on the line, got a surge amperage of 58 amps that leveled off to about 19 to 20 amp and had him turn it off as breaker start to buzz, probably about to trip, remind you he is on a 15A breaker, existing wireing 14AWG romex. Checked his saw and the motor plate lists at 16.8Amps and a 1.5hp motor no FLA listed, calculations on the Mike holts app list that should be about 20A. Appears saw is simply overloading circuit.
So do you charge for this service/trouble call in that there was no issue with breaker/ AFCI fault or the existing breaker panel change out? Time inspecting panel, wireing, and breakers both thermally and voltage, then troubleshoot and metering saw load onto the circuit as well as travel time?
So do you charge for this service/trouble call in that there was no issue with breaker/ AFCI fault or the existing breaker panel change out? Time inspecting panel, wireing, and breakers both thermally and voltage, then troubleshoot and metering saw load onto the circuit as well as travel time?