zdbleam
Member
- Location
- Jacksonville Florida
- Occupation
- Electrical Engineer
Hello,
I have a 12"x12" metallic wireway going to be connected to a large generator dogbox (enclosure on the generator that houses the output terminals). My company has historically used Durodyne, which is a flexible, cut to size ducting with neoprene fabric in the middle. This is not however UL listed for wireway, which has led to some issues with a customer. Apparently the Durodyne is pretty common for this kind of situation.
Looking at the major wireway manufacturers, they only go up to 8x8 for a flexible fitting. Can I use the 8x8 fitting with a 12" to 8" reducer? This would be larger than the max 20% fill for wireway required by NFPA 70: 376.22A, which makes me think it's a no. Otherwise, I'm not sure how to isolate the wireway from the generator's vibration.
Thanks,
zdbleam
I have a 12"x12" metallic wireway going to be connected to a large generator dogbox (enclosure on the generator that houses the output terminals). My company has historically used Durodyne, which is a flexible, cut to size ducting with neoprene fabric in the middle. This is not however UL listed for wireway, which has led to some issues with a customer. Apparently the Durodyne is pretty common for this kind of situation.
Looking at the major wireway manufacturers, they only go up to 8x8 for a flexible fitting. Can I use the 8x8 fitting with a 12" to 8" reducer? This would be larger than the max 20% fill for wireway required by NFPA 70: 376.22A, which makes me think it's a no. Otherwise, I'm not sure how to isolate the wireway from the generator's vibration.
Thanks,
zdbleam