“Next size up” rule and GFCI’s, cord-and-plug equipment

[augie47]

It appears in those two panels the branches are all GFCI. Is the shunt trip for the Ansul system ??

 

[brantmacga]

It appears in those two panels the branches are all GFCI. Is the shunt trip for the Ansul system ??

Yes. The panel with (6)x 3-pole GFCI’s are for fryers, which are under separate hoods. One is for fries, the other for fish/chicken.

The panel with (8)x 3-pole and other single pole GFCI’s is a single grill hood, which also has some 120v loads like coolers, timers, etc.

There are three hoods total. You’ll see a single pull for each located at the back of the kitchen, and there is a single common pull at the front of the kitchen that activates all hood suppression simultaneously.

Before GFCI’s, we would have three separate shunt circuits. Now there’s just one because we’re shunting the branch feeder, so no matter which hood suppression is activated they all shut down electrically.


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[kwired]

Just occurred to me, maybe not so much for situation like the recent posted McD's, but in a small ma and pa restauant - why not supply a small ice cube relay or two with the fire suppression contact and then likely you have GFCI's on the appliances that need shut down so why not just shunt load side of GFCI neutral to a supply side neutral - they all trip just like a shunt trip breaker would.