I recently experienced an electrical phenomenon that I can't explain.
1. The circuit is a 20 amp branch using #12 conductor that feeds a
GFCI duplex outlet that is used primarily for a washing machine. There
are no other outlets on this branch.
2. The home is new and all wiring is to code.
3. When tested with a Ideal Suretest (tm) circuit analyzer, all
measurements are normal.
4. When the washer is the only connected appliance it works with no
5. When my 1.5 HP Porter Cable compressor is connected to the circuit
with no other appliance, it works flawlessly.
6. To date, I have only tried this with the washer and the
7. In neither case does the GFCI trip.
8. In neither case does the breaker trip.
The Problem: Whenever the compressor and the washer are both plugged
in to the outlet at the same time, neither will run.
With the washer turned off, but plugged in the compressor will not
start. With the compressor plugged in, but not running, the washer
will not start.
This is not a situation where the compressor is drawing too much
current to keep the washer from starting. Nor is it a situation where
the washer is drawing too much current for the compressor to start. In
both cases, the other appliance is not running.
There appears to be some interaction between the washer and the
compressor that I cannot explain.
I am baffled.