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#61229 - 01/19/06 05:28 AM Fingersafe devices and NFPA, OSHA
Bill39 Offline

Registered: 11/28/01
Posts: 77
Loc: 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 06:29 AM Re: Fingersafe devices and NFPA, OSHA
Mike Wescoatt Offline

Registered: 06/17/01
Posts: 164
Loc: 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 10:14 AM Re: Fingersafe devices and NFPA, OSHA
C-H Offline


Registered: 09/17/02
Posts: 1508
Loc: Stockholm, Sweden
A few zealous inspectors (industry) carry around a "test finger" to verify that a finger can't reach any live parts.

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

#61232 - 01/19/06 12:24 PM Re: Fingersafe devices and NFPA, OSHA
mshaw Offline

Registered: 01/11/06
Posts: 45
Loc: 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 03:05 PM Re: Fingersafe devices and NFPA, OSHA
JBD Offline

Registered: 07/12/01
Posts: 599
Loc: 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 address the dimensions and (proper) use of the "test" finger.


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