Buffer
If your wall outlets are not GFCI the corded version acts as a buffer between your equipment and the wall. Its not a outlet limit. The one time you hear of someones house catching fire you'll be glad you have one... I've heard that happen more than once.
My ADT system went off at 2am one day only to find that my hang on the back protein skimmer at the time dripped water which ran down the drip loop but slowly shorted something else setting off the smoke detector. The plug was actually black.
Now if anything happens it trips the GFCI and shuts off the power immediately. I sleep safe at night
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