Nfpa 70e

[Glenn Anderson]

A question for discussion>

Do any of you in the industrial or commerical feilds
use the Standard for Electricial Safety in the Workplace?

Being an Electrical Safety Specialist at Princeton Plasma Physics
Lab this is used more than the NEC.

We constantly update our in house directives and procedures.

Thanks for info

 

[bphgravity]

Being an Electrical Safety Specialist at Princeton Plasma Physics
Lab this is used more than the NEC.

We constantly update our in house directives and procedures.

Good for you guys! At least someone at there is trying to do things the right way! Do you guys work on energized equipment? If so, how do you guys calculate the required/needed protection?

 

[ron]

OSHA has been using NFPA 70E to cite safety problems on the job site for several years, as it is nationally recognized.
Arc flash hazard analysis is one particular part that is "hotly" used, for energized work.

 

[bphgravity]

I think you know what I am getting at Ron.

I am interested in how they perform the analysis, specifically what they use for the starting current?

 

[Glenn Anderson]

In regards to PPE gear we use table 130(C)(9)(a) in the 70E, however we take it a few steps further concerning live work.
1. No live work above 240 volts.
2. Operating cb or sws 240V and above cat 2 risk.
3. When making plasma the machine is behind a
interlocked vault.

Our EE's use Annex D in 70E as the basic calc for the
flash boundry and all our panels,sw gear ect have posted limits.

 

[tom baker]

In Washington State, we are under WISHA and not OSHA, so 70E does not apply, unless a federal installation
Its not enforced by our electrical AHJ , but what I see is the requirements for use are comning from the end users.

 

[zog]

I teach 70E classes and I can tell you many companies are trying to follow the 70E standard. Mostly large industry (Auto, steel, chemical) utillities, and now I am seeing electrical contractors. Many jobsites are requiring contractors to be trained in 70E with the proper PPE.