Enclosure Bonding
Enclosure Bonding
(OP)
Quick question about bonding of enclosures: I have several control panels and junction boxes being installed in the field and while the enclosures are grounded to the system ground loop, the doors are not bonded to the enclosure. Does this pose a shock hazard? Also, is there any Code requirement that says you have to bond the doors of a metal enclosure to the enclosure box? I have searched article 250 (and any referenced articles) and have not come up with anything but the field says this is still a problem that needs to be resolved. The boxes are located in a non-hazardous area. Any help is appreciated.






RE: Enclosure Bonding
Bill
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"Why not the best?"
Jimmy Carter
RE: Enclosure Bonding
RE: Enclosure Bonding
Does anyone know of any industry specific codes that address this issue? Possibly API codes?
Bill
--------------------
"Why not the best?"
Jimmy Carter
RE: Enclosure Bonding
RE: Enclosure Bonding
RE: Enclosure Bonding
UL508 / UL508A covers the need for bonding "...all noncurrent carrying metal parts that are exposed or that are able to be contacted by persons during normal operation or adjustment of the equipment, and that are able to become energized due to a breakdown of insulation, loose wiring connection, or electrical disturbance."
If a hot wire in your panel could be unhooked or broken so that it flops against the door, bonding is required. If not, there is wiggle room for a judgement call.
Good on ya,
Goober Dave