Re: [TCML] Determining wire gauge?

[Yurtle Turtle <yurtle_t@xxxxxxxxx>]

I have a "Craftsman American Standard Wire Gage, part no. 4023" that I picked up 
at a garage sale for a quarter. It measures wire gauges from 0 - 36 on one side 
and measures 37 different thicknesses to a thousanths of an inch on the other. 
Kinda like a reverse feeler gauge.

If you can't lay your hands on one of those or a micrometer, another method 
might be to wind ten or twenty turns and measure that. That will give you the 
diameter including insulation.



----- Original Message ----
From: dave pierson <dave_p@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Wed, December 1, 2010 11:54:05 AM
Subject: Re: [TCML] Determining wire gauge?

>Is there a reliable method for determining the size of unknown magnet wire?

    Normal:
    Lay hands (net search?) on a 
    Copper Wire Table
    .
    This will list the diameter.
    And one would need a micrometer/caliper/etc.
    Borrow one?
    (I admit there will be ifness from the insulation...)

    http://library.bldrdoc.gov/docs/nbshb100.pdf
    picked at random.  (OK: I have such tables, in books, but I'm
    'weird'.)

    (Yeah: string a long chunk out and try to measure the resistance...
    iffy.  Still need the tables.)

    I guess one could 'close wind' 10 to 20 turns and try to use a ruler...

    One can weigh it (back to the wire tables...
    And need to know the length.)

>I have access to a supply, but I don't know what the gauge is. It's very 
>thin, probably in the 30s, from electric motor windings.

>PBT 

__ best
    dwp
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