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#61229 - 01/19/06 09:28 AM Fingersafe devices and NFPA, OSHA  
Bill39  Offline
Member
Joined: Nov 2001
Posts: 75
Indianapolis, IN, USA
A lot of the rules pertaining to working in live panels have to do with "fingersafe" devicess. But what exactly is a fingersafe device when it pertains to the NFPA and OSHA.

I believe it would be important to be able to determine immediatlely whether a device is fingersafe or not.

How big can the hole be on the terminal screwdriver... 1/8", 1/4" or what?


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#61230 - 01/19/06 10:29 AM Re: Fingersafe devices and NFPA, OSHA  
Mike Wescoatt  Offline
Member
Joined: Jun 2001
Posts: 161
Cedar City, Utah
As far as IP classification fingersafe (IP2x) is protected against objects over 12mm in diameter. Is there a NEMA equal other than calling it NEMA-1 or better?


Mike Wescoatt

#61231 - 01/19/06 02:14 PM Re: Fingersafe devices and NFPA, OSHA  
C-H  Offline
Member
Joined: Sep 2002
Posts: 1,497
Stockholm, Sweden
A few zealous inspectors (industry) carry around a "test finger" to verify that a finger can't reach any live parts.
http://www.ergonomicsusa.com/accJFP15.html

[This message has been edited by C-H (edited 01-19-2006).]


#61232 - 01/19/06 04:24 PM Re: Fingersafe devices and NFPA, OSHA  
mshaw  Offline
Member
Joined: Jan 2006
Posts: 44
Fairborn, Oh, USA
I had a test finger once but my foreman took it away, guess he did not like how I applied it


#61233 - 01/19/06 07:05 PM Re: Fingersafe devices and NFPA, OSHA  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
I don't think NFPA70E (and therefore OSHA) recognizes the term finger safe for 480V work. Table 130.2(C) says the restricted approach boundry for 480V is 1". Anything closer is considered making contact with the live part.

So finger safe terminals would help for the 50-300V "avoid contact" boundary but they would need to have a 1" recess for 480V.

NFPA79 6.2.2.1 address the dimensions and (proper) use of the "test" finger.



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