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#175307 - 02/26/08 07:20 PM
70E Where stickers (Not 110.16) not 110.16 sticker
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Yoopersup
Member
Registered: 03/04/03
Posts: 440
Loc: Michigan
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NFPA says Hazard Analysis anything operationing at over 50 volts . That Means Mcc's, Switchgear, Panels 120/208
277/480 & up and up. I take it that includes Panels and Equipment over 50 volts Period. Example PLC 120 volt feed??
fire alarm Panel. 120/240 volt feed.
X ray Machine ect ect. Where is the Break Line and where in 70E does it say the break line is?? NEC 110.16 Spells out where ist sticker goes . 70E from what I see Doesn't where second one is required except Fer Hazard analysis. 2008 NEC adds Electrical Equipment to 110.16.look up equipment in definations in NEC umm this gets interesting??
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#175310 - 02/26/08 08:39 PM
Re: 70E Where stickers (Not 110.16) not 110.16 sticker
[Re: Yoopersup]
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JBD
Member
Registered: 07/12/01
Posts: 453
Loc: WI, USA
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NFPA70E does not require any sticker/lables in addition to those in NEC 110.16.
70E requires appropiate PPE for all energized work above 50V. There is no relief.
There are several options available for determing the appropiate PPE, a full blown "arc flash" study based on IEEE 1584 is only one method.
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#175322 - 02/26/08 09:37 PM
Re: 70E Where stickers (Not 110.16) not 110.16 sticker
[Re: JBD]
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Yoopersup
Member
Registered: 03/04/03
Posts: 440
Loc: Michigan
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All over 50 volts covers a lotta ground.
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#175326 - 02/26/08 10:04 PM
Re: 70E Where stickers (Not 110.16) not 110.16 sticker
[Re: JBD]
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Yoopersup
Member
Registered: 03/04/03
Posts: 440
Loc: Michigan
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But Like lets say you open a Fire alarm Pnl/ 120/240 >
voltage test ist with PPE on??? Sticker on Box??
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#175329 - 02/26/08 10:41 PM
Re: 70E Where stickers (Not 110.16) not 110.16 sticker
[Re: frenchelectrican]
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JBD
Member
Registered: 07/12/01
Posts: 453
Loc: WI, USA
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There is no IEEE 1584 calculation for single phase circuits regardless of voltage so they are not normally part of arc flash studies therefore they rarely have a cal/cm² sticker on them.
If the calories or Hazard Risk Category (HRC) are not known you are only left with the 70E task tables. If the circuits are current limiting then you may be able to take advantage of the provisions that allow a reduction in the normal task table HRC.
How come the Wisconsin and UP guys are up at this time of night, don't you have to get up and shovel in the morning?
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