Arc Flash labels for fused disconnect switch

[DShepta]

I have two fused disconnect switches which are being fed from a generator. Do the disconnects need to be provide with an arc flash label.:?

 

[don_resqcapt19]

The only NEC requirement is found in 110.16. That only requires a generic arc flash hazard warning label. In my opinion your disconnects are not covered by the rule in 110.16. NFPA 70E would likely require a full arc flash label, but that is rarely an adopted code, however failure to comply in a work place could be an OSHA issue.

 

[wbdvt]

NFPA 70E-2015 Art. 130.5(D) states that electrical equipment that is likely to require examination, adjustment, servicing, maintenance while energized shall be field marked with a label.
So, will these disconnect switches be opened to test for voltage for LOTO? What happens when a fuse is suspected of being bad? Is the switch open and tested for voltage?

You would need a label and PPE for the above.

 

[don_resqcapt19]

While as I said, there may be reasons to post the 70E arc flash information, it is rare that 70E is an adopted code that can be enforced by the AHJ.

 

[wbdvt]

True but OSHA is citing lack of proper PPE via 1910.132 and 70E is a recognized standard.

 

[Strathead]

NFPA 70E-2015 Art. 130.5(D) states that electrical equipment that is likely to require examination, adjustment, servicing, maintenance while energized shall be field marked with a label.
So, will these disconnect switches be opened to test for voltage for LOTO? What happens when a fuse is suspected of being bad? Is the switch open and tested for voltage?

You would need a label and PPE for the above.

In the old days yes, today it shouldn't be. With proper training, the fuses would be tested with an ohmeter, not a voltmeter.

 

[don_resqcapt19]

True but OSHA is citing lack of proper PPE via 1910.132 and 70E is a recognized standard.

Very true, but the posting of the information on the electrical equipment is the responsibility of the employer, not the electrical contractor, unless the contract documents require the EC to provide that information.