# GFCI 2020--UH OH

#### mbrooke

##### Batteries Included
I'm a tad weak in the math dept MBrooke....:ashamed1:~RJ~

Xc = Capacitive Reactance in Ohms, (Ω)
π (pi) = 3.142 (decimal) or as 22÷7 (fraction)
ƒ = Frequency in Hertz, (Hz)
C = Capacitance in Farads, (F)

#### Attachments

• freq.jpg
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#### mwm1752

##### Senior Member
For the purposes of this section, when determining the distance from receptacles the distance shall be measured as the shortest path the supply cord of an appliance connected to the receptacle would follow without piercing a floor, wall, ceiling, or fixed barrier, or the shortest path without passing through a window.

Why wouldn't a built in frig, under cab trash compactor, under cab frig, under cab dryer that has to be remove before accessing the recept & plug be considered a barrier?

#### kwired

##### Electron manager
I'd agree. But Kwired, how would you feel is this was your next commercial panel?

https://forums.mikeholt.com/forum/ac...96#post2547396

Typical North American market panels don't use up a pole space for GFCI's, and plug on neutrals of more recent times sure are convenient when you need to use several devices that need a neutral connection. And yes we are getting closer to needing either GFCI, AFCI or both on nearly everything, but you certainly don't want a fault on a not so significant circuit to shut down the entire premises, so main breaker GFCI or even AFCI is not the way to go.

#### mbrooke

##### Batteries Included
Typical North American market panels don't use up a pole space for GFCI's, and plug on neutrals of more recent times sure are convenient when you need to use several devices that need a neutral connection. And yes we are getting closer to needing either GFCI, AFCI or both on nearly everything, but you certainly don't want a fault on a not so significant circuit to shut down the entire premises, so main breaker GFCI or even AFCI is not the way to go.

Even with plug on neutral, you will be looking at either a longer breaker taking up gutter space or double wide breakers. Half size schemes used in residential applications that make up 1 inch breakers won't work well in commercial due to heat build up, limited AIC and need gor larger poles on higher current circuits.