I think this is an nfpa 70E, Table 130.7.C.9.a question. The equipment in question is 13.8kv.
The scenerio:
Protective grounds were installed after dead bus verification using Haz Cat 4 PPE. Maintenance work was completed. The same qualified person that installed the grounds donned the same Cat 4 PPE and removed grounds.
The Question:
After the work was completed, I was asked by one of the techs (yes, he is considered qualified) if wearing Cat 4 PPE is required for removing the grounds. He pointed out the bus is verified dead - no longer considered energized.
I said I would do some reading. ... Table 130.7.C.9.a, Metal clad switchgear, 1kv and above, lists a task for, "Application of safety grounds after voltage test" - Cat 4, V-rated gloves required. No mention of any task for removing safety grounds.
My inclination is to say nfpa70E doesn't require any special PPE for removal of safety grounds. Anybody got any thoughts on the question?
carl
The scenerio:
Protective grounds were installed after dead bus verification using Haz Cat 4 PPE. Maintenance work was completed. The same qualified person that installed the grounds donned the same Cat 4 PPE and removed grounds.
The Question:
After the work was completed, I was asked by one of the techs (yes, he is considered qualified) if wearing Cat 4 PPE is required for removing the grounds. He pointed out the bus is verified dead - no longer considered energized.
I said I would do some reading. ... Table 130.7.C.9.a, Metal clad switchgear, 1kv and above, lists a task for, "Application of safety grounds after voltage test" - Cat 4, V-rated gloves required. No mention of any task for removing safety grounds.
My inclination is to say nfpa70E doesn't require any special PPE for removal of safety grounds. Anybody got any thoughts on the question?
carl