First question: Would you consider metallic outlet box or a box an enclosure?
2nd question: Would you require a bonding conductor if the conduit housed circuit or feeder conductors of 480V and 277 to ground originated in a panel and ended on a 4s square box? Or if the feeder conductor originated in the one panel and ended on another panel.
Based on the UL listing, I would not require the conductor type bonding, but I like to know your comments. I got into a debate with an inspector and want to get clarified.
Thanks
From UL 2012
CONCENTRIC OR ECCENTRIC KNOCKOUTSAll boxes with concentric or eccentric knockouts have been investigated for bonding and are suitable for bonding without any additional bonding means around concentric (or eccentric) knockouts where used in circuits
above or below 250 V, and may be marked as such.
2nd question: Would you require a bonding conductor if the conduit housed circuit or feeder conductors of 480V and 277 to ground originated in a panel and ended on a 4s square box? Or if the feeder conductor originated in the one panel and ended on another panel.
Based on the UL listing, I would not require the conductor type bonding, but I like to know your comments. I got into a debate with an inspector and want to get clarified.
Thanks
From UL 2012
CONCENTRIC OR ECCENTRIC KNOCKOUTSAll boxes with concentric or eccentric knockouts have been investigated for bonding and are suitable for bonding without any additional bonding means around concentric (or eccentric) knockouts where used in circuits
above or below 250 V, and may be marked as such.