UL508A / GFCI required ?

[DhQ]

I design a industrial control panel to meet UL508A.
My question: is there a requirement to use a GFCI for a receptacle and loads?

The only section that notes the use of a GFCI is 28.6.6, and only if the panel is intended for outdoor use.
GFCI protection for loads other then when indented for fountain, aquatic playgrounds and so on , I could not find.

e.g.
1) heater load, external from the control panel (single phase)
2) heater load, external from the control panel (three phase)
3) receptacle, inside the control panel, for "service / maintenance use only"

Is a GFCI in any of this cases required?

thanks for your help!

 

[tom baker]

I would suggest a GFCI. What ever is plugged in will be used outside the cabinet, perhaps by someone standing on a concrete floor. I had feed thru GFCIs that fed a door mounted recptacle

 

[petersonra]

I design a industrial control panel to meet UL508A.
My question: is there a requirement to use a GFCI for a receptacle and loads?

The only section that notes the use of a GFCI is 28.6.6, and only if the panel is intended for outdoor use.
GFCI protection for loads other then when indented for fountain, aquatic playgrounds and so on , I could not find.

e.g.
1) heater load, external from the control panel (single phase)
2) heater load, external from the control panel (three phase)
3) receptacle, inside the control panel, for "service / maintenance use only"

Is a GFCI in any of this cases required?

thanks for your help!

Required by ul508a?

See 28.6.6, 94.2.1, 102.2.1, 107.3.1, 112.4.1.

If it is not in one of those paragraphs no GFCI is required by ul508a.

That does not mean that the NEC does not require it. But if it does, that protection could be downstream.

There is also the good idea concept as mentioned by Mr. Baker.

 

[tom baker]

Where I worked, every 15-20 120 volt receptacle in pump stations, wells, reservoirs had GFCI required or not.