I had an electrician install a dedicated 20 amp GFCI duplex outlet and 20 amp circuit breaker (both customer supplied) two years ago. The outlet is directly below the panel box. Just this month, I mistakenly operated a 12 amp vacuum cleaner, a 12.5 amp space heater (on max heat), a 1/2 amp fan (on max speed, an air purifier, and three LED lamps, at the same time, out of that outlet for a few minutes. That’s 26 amps, or 130% of the rated current.
According to Waytek’s Table of “trip time versus percentage of rated current”, it should’ve tripped somewhere between 100 seconds (one min 40 secs) and 1000 seconds (16 mins 40 secs). That’s too big a range for me. And the chart was too hard to interpret for me. In any case, it did not trip. How long should it have taken before tripping?