Solar Edge Fast Mount

[rojay]

Is anyone using the Solar Edge Fast Mount 36? Basically, it’s a non metallic wireway that comes with pre-punched KO’s and plastic nipples that match up with their inverter and backup interface.

I’m just curious about how local AHJ’s have been responding to this setup. I’ve seen contractors running everything but the kitchen sink in these- PV conductors, inverter output conductors, feeders & service conductors with no separation. What about the ampacity adjustment factors for a nonmetallic wireway- do they apply here?

 

[jaggedben]

Is anyone using the Solar Edge Fast Mount 36? Basically, it’s a non metallic wireway that comes with pre-punched KO’s and plastic nipples that match up with their inverter and backup interface.

I’m just curious about how local AHJ’s have been responding to this setup. I’ve seen contractors running everything but the kitchen sink in these- PV conductors, inverter output conductors, feeders & service conductors with no separation.

Service conductors and PV DC conductors should be kept separate. Otherwise that's fine.

What about the ampacity adjustment factors for a nonmetallic wireway- do they apply here?

Same as for a metallic wireway. No derating required until you have 30 current carrying conductors. Also for a short distance (24" or less) adjustment is not required.

 

[rojay]

Service conductors and PV DC conductors should be kept separate. Otherwise that's fine.


Same as for a metallic wireway. No derating required until you have 30 current carrying conductors. Also for a short distance (24" or less) adjustment is not required.

I thought ampacity adjustment was required after the 4th conductor for non metallic wireways- 378.22?

Is it possible that the listing of the equipment may allow the service conductors to share the space? Would the wording of 2023 NEC 690.31(B)(1) modify 230.7?

 

[jaggedben]

I thought ampacity adjustment was required after the 4th conductor for non metallic wireways- 378.22?

Ok, you are correct. I do not know why the rules are different for metallic and nonmetallic wireways.

Is it possible that the listing of the equipment may allow the service conductors to share the space? Would the wording of 2023 NEC 690.31(B)(1) modify 230.7?

No, and it doesn't. 690.31(B)(1) just places additonal restrictions around PV DC circuits.