70e question

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bure961

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Farmingham, MA
We had a arc flash survey at our plant and had a testing co. come in to test the neutral to ground bond Ibelieve it was to measure the current on the neuteal to bond. This is at the switchgear before the main cb. This at the service . Is this a violation of 70e. If their safety policy says no energized work than this should be a violation. 480V LEVEL 4 PPE ON MAIN.
 
We had a arc flash survey at our plant and had a testing co. come in to test the neutral to ground bond Ibelieve it was to measure the current on the neuteal to bond. This is at the switchgear before the main cb. This at the service . Is this a violation of 70e. If their safety policy says no energized work than this should be a violation. 480V LEVEL 4 PPE ON MAIN.
So,are you saying they were not using PPE when they were conducting the test ?
 
Technically it is also a violation of your safety policy as well, and if something happened to them your company would get a fine.

110.1 Relationships with Contractors (Outside Service Personnel, etc.).

(A) Host Employer Responsibilities.
(1) The host employer shall inform contract employers of:
a. Known hazards that are covered by this standard, that are related to the contract employer?s work, and that might not be recognized by the contract employer or its employees
b. Information about the employer?s installation that the contract employer needs to make the assessments required by Chapter 1
(2) The host employer shall report observed contractemployer- related violations of this standard to the contract employer.

(B) Contract Employer Responsibilities.
(1) The contract employer shall ensure that each of his or her employees is instructed in the hazards communicated to the contract employer by the host employer. This instruction is in addition to the basic training required by this standard.
(2) The contract employer shall ensure that each of his or her employees follows the work practices required by this standard and safety-related work rules required by the host employer.
(3) The contract employer shall advise the host employer of:
a. Any unique hazards presented by the contract employer?s work,
b. Any unanticipated hazards found during the contract employer?s work that the host employer did not mention, and
c. The measures the contractor took to correct any violations reported by the host employer under paragraph (A)(2) of this section and to prevent such
violation from recurring in the future.
 
We had a arc flash survey at our plant and had a testing co. come in to test the neutral to ground bond Ibelieve it was to measure the current on the neuteal to bond. This is at the switchgear before the main cb. This at the service . Is this a violation of 70e. If their safety policy says no energized work than this should be a violation. 480V LEVEL 4 PPE ON MAIN.

I don't see how you can measure the neutral-bond current with the power de-energized. As long as they were wearing appropriate PPE what would they have been doing wrong?
 
I don't see how you can measure the neutral-bond current with the power de-energized. As long as they were wearing appropriate PPE what would they have been doing wrong?

I also see an implied question in the OP's post.
If the posted arc flash numbers are for the main CB, what numbers should be used at the location of the bond which may be in an upstream enclosure from the CB?

Tapatalk...
 
I also see an implied question in the OP's post.
If the posted arc flash numbers are for the main CB, what numbers should be used at the location of the bond which may be in an upstream enclosure from the CB?

Tapatalk...
Neutral-to-ground bond, i.e. the MBJ of a service, is required to be in the same enclosure as the service disconnecting means. Also, posted arc flash numbers are for each enclosure... right?
 
It can also be upstream, e.g. in meter base. Not sure there are not other options for non-residential.

Tapatalk...
Point taken in that grounding electrode conductors can be connected at any point along the grounded service entrance conductor, including it terminal points.

The point I was trying to make was that arc flash is determined for the enclosure they were working in, regardless of what they were actually measuring.
 
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