I was concerned that a circuit had too many things on it, so I turned them
on one by one, and measured the amps on the hot at the circuit box.
Everything took less current than the nameplates indicated; varying from 1%
less for my toaster oven to 20% less for a 150w bulb. Is that typical, or
should I be questioning the accuracy of my meter? (The voltage measured
They likely indicate Max. Amps. due to tolerances and voltage differences
and may round it off. Some equipment (motors, solenoids, etc.) may
initially draw more amps than during steady state operation (motor
starting, impedence, etc.). I would only be concerned if something was
drawing more amps than its rating, or if total amps exceeded the circuit
David Efflandt - All spam ignored http://www.de-srv.com /
http://www.autox.chicago.il.us/ http://www.berniesfloral.net /
I have a standard watt meter like you have at your
electrical entrance (old ones are pulled by the power
company are often sold to the public) that I wired for 120 V
to test individual appliances. The meters I have are
certified, so I expect they are accurate. A motor has too
much variation so I use a 100 W bulb for a reference.
However, a 100 W bulb (or any other wattage bulb) never
reads the wattage marked on the bulb. When I'm not checking
electric usage over a period of a month or several months, I
read for only 3 minutes so I would expect variation from the
bulb mark due to temperature and manufacturing tolerance.
BTW, I not sure why more people don't use one of these as it
sure pinpoint an inefficient appliance.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.