Arc Flash Hazard

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eeeee

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Does it say in NFPA 70E the different arc flash hazard signs that must be posted on the various panelboards and switchboards based on the outcome of the arc flash hazard calculations?

I may not have access to the NFPA 70E until next week.

We have some panelboards and switchboards that we must post the various arc flash hazard signs on based on arc flash hazard calculations performed by the contractor. I understand this may be a NFPA 70E requirement, but is not found in the NFPA 70 (I checked the NFPA 70)
 
davidr43229 said:
The NFPA-70 is the National Electrical Code. Check out section 110.16
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The OP was asking about 70E

eeeee said:
Does it say in NFPA 70E
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110.16 Flash Protection. Switchboards, panelboards, industrial control panels, and motor control centers in other than dwelling occupancies, that are likely to require examination, adjustment, servicing, or maintenance while energized, shall be field marked to warn qualified persons of potential electric arc flash hazards. The marking shall be located so as to be clearly visible to qualified persons before examination, adjustment, servicing, or maintenance of the equipment.

FPN No. 1: NFPA 70E-2000, Electrical Safety Requirements for Employee Workplaces, provides assistance in determining severity of potential exposure, planning safe work practices, and selecting personal protective equipment.

FPN No. 2: ANSI Z535.4-1998, Product Safety Signs and Labels, provides guidelines for the design of safety signs and labels for application to products
 
If I place a sticker on a panel that says "Arc Flash Hazard" I have met requirements of 110.16.

110.16 does not require that I place a cal rating on the panel.

I believe those requirements can be found in 70E
 
Generally the NEC only covers the requirement to have it labeled as such, the NFPA 70E gives you the guidelines to produce a proper label.

Here is an example of a proper label....

screenshot_label_big.jpg
 
NFPA70E says absolutely nothing about what should be shown on a label. Label wording is left strictly up to the facility.

If you go to a label manufacturer like W.H. Brady you will at least a dozen typical labels.
 
the NFPA 70E gives you the guidelines to produce a proper label.

lol...I said guidelines to a proper label....lol...not DEMANDS for one...;)..or bad choice of words.....how about things to consider...:)
 
Although the NEC requires a generic arc flash warning, I don't know of any code or standard that requires actual labels be placed on equipment with calculated values. The calculated values need to be available so that an energized work permit and appropriate PPE can be picked, but I don't know of a requirements for them to be posted on the equipment.
 
"NFPA70E says absolutely nothing about what should be shown on a label. Label wording is left strictly up to the facility."

That is true, currently. Proposal # 70E-300 was accepted by the commitee to add a new section in the 2009 70E entilled 130.3 (C) Equipment labeling - Equipment shall be field marked with a label containing the available incident energy or required level of PPE.

So why put a generic label on now only to have to change it in a couple of years?
 
zog said:
So why put a generic label on now only to have to change it in a couple of years?
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Because, the proposal has not been accepted yet. The arc flash incident energy level (and labels) should be updated every few years any way. Also, there is a proposal for 2009 that will limit how long labels are "valid" for.
 
Jim, you are correct about the other proposal, it is a max of 5 years I think. But, do you really think facillities will do the updates? I think most companies will do the study and labels and think they are finished.
 
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