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| Arc rated face shields / hoods for 120v? https://brainfiller.com/arcflashforum/viewtopic.php?f=5&t=5388 |
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| Author: | 1000caloutletsohno [ Wed Dec 09, 2020 8:34 am ] |
| Post subject: | Arc rated face shields / hoods for 120v? |
I've been tasked with updating my company's live electrical safety program. Hasn't been done thoroughly since '08. For the longest time it appears we've been operating pretty much on this basis: in panels 240v and below use arc rated gloves, long sleeve, eye protection, hard hat, non melting pants, leather work boots. If over 240, arc rated face shield, rubber gloves with leather protectors, FR coveralls or jacket, and everything mentioned above This seems to be fairly outdated, but still I was looking at the 2018 and 2021 70E and if using the PPE selection method, it appears (to my chagrin) that 240v and below work now requires a arc rated face shield or arc flash hood. This seems a bit preposterous. Let me also add that I am not an engineer at all. I have much more history DOING electrical work than writing safety programs. This literature seems to indicate that for me to pop in a 120v breaker I need to be in full body armor. Can anyone clarify this for me - or - if this is in fact the case, can someone recommend an alternative to these absurd LAUGHABLE rules written by the uncaloused hands of ivory tower busybodies. |
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| Author: | wbd [ Thu Dec 10, 2020 6:53 am ] |
| Post subject: | Re: Arc rated face shields / hoods for 120v? |
The tables in NFPA 70E are conservative. Your facility may benefit by having a study done to determine the actual incident energy values for equipment in your facility. You may find that the IE is much less than the table method would indicate and therefore less PPE is needed. Remember that to use the tables you need to be within the stated parameters for fault current and clearing time. How do you know those if a study has not been done? Which leads back to the first paragraph here. |
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| Author: | mpparent [ Fri Dec 11, 2020 9:09 am ] |
| Post subject: | Re: Arc rated face shields / hoods for 120v? |
To dovetail in with Barry's comments: the selection of PPE via the tables is a risk based analysis. That's why it may be a more conservative approach. As already mentioned, you also have to fit into the "box" of stipulations the tables require. Mike PS I hate the tables. 
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| Author: | Terry Becker [ Mon Jan 25, 2021 9:10 am ] |
| Post subject: | Re: Arc rated face shields / hoods for 120v? |
NO arc flash PPE is required for working on 120VAC single phase or 240VAC single phase energized electrical equipment. This should be documented in the employer's Electrical Safety Program. Shock PPE will be required if the Qualified Person cannot avoid contact. There is an arcing fault hazard so as at minimum leather work gloves and approved safety eyewear may be required. |
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| Author: | aguywithfeet [ Mon Jan 24, 2022 8:40 am ] |
| Post subject: | Re: Arc rated face shields / hoods for 120v? |
Hope it's not too late to get a response, but why do you say there is no requirement for arc flash gear on 120v circuits? |
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| Author: | mpparent [ Wed Jan 26, 2022 10:46 am ] |
| Post subject: | Re: Arc rated face shields / hoods for 120v? |
At 120V, the arc can't be maintained. Mike |
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| Author: | moreause [ Mon Mar 28, 2022 2:47 pm ] |
| Post subject: | Re: Arc rated face shields / hoods for 120v? |
mpparent wrote: At 120V, the arc can't be maintained. Mike that was also what i was remembering but i have seen arc flash sticker on 120/240 volts panel from time to time was also stating to wear an arc flash hood for a 4 inch, 0,4 calories but since i was not putting my face in that 4 inch zone i said ...F it |
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