Is there a NEC code that I can reference for an surge protection device that is not accessible in a NEMA cabinet.

[Cjmccarthy]

Is there a NEC code that I can reference for a surge protection device that is not accessible in a NEMA cabinet. I was told to look at 110.26, but that seems to be for rooms. This is in a 334 NEMA cabinet for the DOT. The SPD is located behind an aluminum plate where it can't be seen to see if it working, and it is not accessible to replace if needed. I attached the front and rear view of the cabinet. As always, thank you for the help.

 

[don_resqcapt19]

Is the cabinet a listed control panel or other listed product? If so the NEC does not apply inside the cabinet.

 

[Cjmccarthy]

Is the cabinet a listed control panel or other listed product? If so the NEC does not apply inside the cabinet.

Listed product? I am not sure what that is.

 

[augie47]

Listed product? I am not sure what that is.

Factory assembled with a UL or other NRTL label (came prewired only needing external wiring connected)

 

[Cjmccarthy]

Factory assembled with a UL or other NRTL label (came prewired only needing external wiring connected)

Some of the cabinet is wired, and the remainder is field installed. Thank you for the response.

 

[tom baker]

I was a IMSA traffic signal tech for 30+ years and articles for the IMSA Journal Traffic signal equipment, such as controllers, load switches, conflict, monitors, loop detectors, etc. are not listed. In my state, the NEC only applied to the electrical service everything downstream was not listed or covered under different standards. As others pointed out, it’s not likely the NEC applies to the inside your cabinet, and it’s not the NEC that would apply, but rather a standard such as ULL 508A. What I would suggest you do if this is a concern is to change your product standards and your bid specs

 

[petersonra]

In my opinion the SPD is accessible easily by loosening the mounting plate screws. I don't have an issue with it.

 

[tom baker]

UL listed SPDs will have an end of life or loss of protection LED. Checking the status of this LED should be part of the signal techs monthly PM’s. Some SPDs have indication that can be remote mounted.

 

[mtnelect]

I worked for Los Angeles County Department of Public Works - Traffic & Lighting as an Electrician Supervisor in the Signal Shop. All 170 controllers had to be inspected, "Stressed Tested" and approved before being installed in the field by private contractors. Also, we had our own field inspectors that supervised the construction of traffic signals per the "Green Book" state standards for public works.

Sounds like FDOT has to update their "Green Book" standards to reflect your concern.