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 Post subject: Equipment Cat. Method Tables with Incidnet Energy Analysis
PostPosted: Tue Jan 12, 2021 2:48 pm 

Joined: Mon Aug 04, 2014 5:19 pm
Posts: 14
I am using SKM software with 1EEE 1584 for an incident energy analysis.
Customer want to show the PPE Level on the arc flash label and not the arc flash energy on the label which is Ok.
But the customer wants to show the PPE (PPE Level 0&1,2,3,5) from the NFPA 70E-2021 table 130.7 c (15)(a) on the label which is the PPE Equipment Category Method and not the SKM PPE Level from the software program (Level 0,3,4,dangerous).
I know that you can label site specific PPE on a label but it seems that this is mixing apples and oranges since I am doing an incident energy analysis?
thanks Jimmy


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 Post subject: Re: Equipment Cat. Method Tables with Incidnet Energy Analys
PostPosted: Wed Jan 13, 2021 6:34 am 

Joined: Thu Apr 18, 2019 11:42 am
Posts: 40
What your customer wants isn't the correct application of the 70E guidance. The table you refer to is only specific to using the table method. Table 130.5 (G) is the PPE table to be used when an incident energy analysis has been performed. SKM bases its PPE table on 130.5(G) in the 70E.

Mike


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 Post subject: Re: Equipment Cat. Method Tables with Incidnet Energy Analys
PostPosted: Wed Jan 13, 2021 9:56 am 
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Joined: Mon Sep 17, 2007 5:00 pm
Posts: 1561
Location: Scottsdale, Arizona
(not a formal interpretation)
Site specific is open to interpretation. If an owner wants to adopt their own values, they can but it needs conveyed to the workers and everyone involved. So 1, 2, 3, 4 is OK if it is "site specific' Basically I view this as a loophole stemming back to resolving a 2009 NFPA 70E issue when NFPA 70E began with prohibiting including HRC (since changed to PPE category) and incident energy an the label together. There was quite a protracted debate (I as part of it) regarding all this and "site specific" was the compromise.

My preference these days is to list the arc rating instead. People really just want to know what to wear.

I have a video (free) that includes a simplified labeling strategy (Module 7 in the series) that satisfies NFPA 70E 130.5(H). Many companies have been adopting this approach.

Simplified Labeling Video


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 Post subject: Re: Equipment Cat. Method Tables with Incidnet Energy Analys
PostPosted: Mon Jan 25, 2021 9:27 am 
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Joined: Sun Sep 23, 2007 5:00 pm
Posts: 127
Location: Calgary, Alberta, Canada
Your questions have been ERRORs in the PE or P.Eng. authenticated Arc Flash Hazard Incident Energy Analysis Report issued for over a decade and still happening.

The employer's Electrical Safety Program should specify/stipulate the arc flash & shock PPE, tools & equipment that will be procured and made available to Qualified Persons NOT the PE or P.Eng. report issued.

In reality the report should ONLY include the calculated incident energy at assumed working distance and the arc flash boundary distance calculated. Any reference to arc flash PPE should advise the client to reference NFPA 70E or CSA Z462 that is it.

The ERROR and MISINFORMATION in PE or P.Eng. authenticated reports over the last 10 years was:

1. The inclusion in the SKM, ETAP or Easypower "Results Table" report of Hazard Risk Category. HRC 0, 1, 2, 3 or 4.
2. The inclusion in the SKM, ETAP or Easypower "Results Table" report of Arc Flash PPE Category. AFPPE Cat 1, 2, 3 4.
3. The inclusion in the SKM, ETAP or Easypower "Results Table" report of Arc Flash PPE Level "#" or Level "letter." Level A, B, C, D or E.
4. The inclusion of "Dangerous," " No PPE Exists" when the calculated incident energy is greater than 40 cal/cm2.

As defined by ASTM F1506 and F1959 flame resistant cloth is tested to determine its Arc Thermal Performance Value (ATPV).

The Qualified Person should be taught that when arc flash hazard incident energy analysis calculations are completed they confirm that the installed arc flash & shock equipment label is:

1. Applied to the correct electrical equipment.
2. Confirm that the footer of the equipment label includes the upstream electrical protective device ID that the indicated incident energy of the label is based on.

Then the Qualified Person selects the arc flash PPE based on what their employer has specified and procured in their Electrical Safety Program based on the ATPV which will need to be equal to or greater than the calculated incident energy.

Two arc-rated ATPV levels should be documented in the employer's Electrical Safety Program:

ESP Level 1 8-12 cal/cm2
ESP Level 2 should be minimum 75 cal/cm2, 100 or 140 cal/cm2

This all aligns with NFPA 70E Table 1305(G) or CSA Z462 Table 3.

FYI arc blast pressure doesn't correlate to incident energy and when a work task's risk assessment procedure is completed (also required to documented in the employer's Electrical Safety Program) potential injury or damage to health residually for arc blast pressure should be repairable injury only.


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