We recently performed a full evaluation of our Class II, Division 1 classified locations (coal handling). There were several instances in one building where single locknuts were used for conduit penetrations in enclosures.
What can we do to meet the Code requirements for these conduits/enclosures?
Is there a "quick fix" that can be retrofitted to the system?
Can we redo the penetrations with Myers Hubs?
Can we install external bonding jumpers to meet the Code requirements? There is a note in the 2008 Handbook under 502.12(B)(4) that states "Standard pressed-steel boxes that are not identified for Class II locations are permitted as long as they do not contain taps, joints, or terminal connections, are dusttight, and ARE PROVIDED WITH A BONDING JUMPER AROUND THE BOX IN ORDER TO COMPENSATE FOR THE ABSENCE OF THREADED HUBS." I know this is under the Class II, Div 2 section, but does this apply to Class II, Div 1 areas also? If so, this would save a tremendous amount of time and money?
Thanks!
What can we do to meet the Code requirements for these conduits/enclosures?
Is there a "quick fix" that can be retrofitted to the system?
Can we redo the penetrations with Myers Hubs?
Can we install external bonding jumpers to meet the Code requirements? There is a note in the 2008 Handbook under 502.12(B)(4) that states "Standard pressed-steel boxes that are not identified for Class II locations are permitted as long as they do not contain taps, joints, or terminal connections, are dusttight, and ARE PROVIDED WITH A BONDING JUMPER AROUND THE BOX IN ORDER TO COMPENSATE FOR THE ABSENCE OF THREADED HUBS." I know this is under the Class II, Div 2 section, but does this apply to Class II, Div 1 areas also? If so, this would save a tremendous amount of time and money?
Thanks!
