GFCI Receptacles in Parking Garages

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ERICN

New User
Location
West Chicago, IL.
Occupation
AV Integrator
Our company installed a smaller video wall on the exterior wall of a parking garage in Chicago. Manufacturer of the video wall electrical requirements was pretty simple, the wall required three dedicated receptacles fed by three dedicated 20amp circuits.
Inside the parking garage, directly behind the wall is a enclosed utility room where the main electrical panel is located along with the three dedicated receptacles.
The video wall panel power supplies are fed through the wall and plugged directly into the GFCI protected receptacles.
Problem is: The video walls are tripping the GFCI receptacles, the manufacturer of the video wall is telling us the following-“The leakage current per power supply (from the LED wall power supplis) is 1 mA, so per column would be 9mA. If the GFI is only 5mA, that's not enough. Usually we need equipment-rated GFI, which is 30mA. So, they may need to replace all the GFIs to make the LED wall work.”
In my research of the 2023 NEC, according to 210.8 would an enclosed utility room in a detached parking garage be considered an accessory building? Are the receptacle's in this situation required to be GFCI protected?
 
210.8(B) tells you where you need GFCI protection. I would think the following could apply if this is a typical parking garage:
(8) Indoor damp or wet locations (many times a grey area up to inspector's call)
(10) Garages, accessory buildings, service bays, and similar areas other than vehicle exhibition halls and showrooms
(12) unfinished areas of basements (if this is an underground parking garage and the utility room is unfinished)

Can't you just add more receptacles to these circuits and use more GFCI receptacles that are only supplied from their LINE side. Limit yourself to two power supplies per duplex receptacle if you have to.
 
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