Re: Has Electric wire gotten smaller for the same guager?

I have noticed that insulation is now thinner than on wires made 20 or 40
years ago.

"mm" <NOPSAMmm2005@xxxxxxxxxxx> wrote in message
news:j712b31fsb4lt8h6bph0rmj81i5743hupv@xxxxxxxxxx
On Wed, 01 Aug 2007 21:33:14 GMT, "Travis Jordan" <no.one@xxxxxx>
wrote:

"Colbyt" <colbyt@xxxxxxxxxxxxxxxxxxxxxxx> wrote...
Since it is too hot to play outside I was stripping some wire in recycle
box. It looked like some of the old 12 gauge was bigger than the new
stuff. So I stripped exactly 1 foot of 12/2 wg 20 years old and 2-3
years
old and weighed it on my postal scale. They sure as heck did not look
the
same or weight the same.

As the insulation has gotten better and more heat resistant has the wire
been down-sized?

Postal scale? Probably not accurate enough for this measurement. Anyway,

Accuracy is not really a concern when comparing two weights on the
same scale.

Precision is what matters. One should either weigh the same thing
several times to see if the reading is always the same, or average the
readings if they are different**. Same thing with the other item.

**If the readings are different from one time to the next, one should
tap the scale with the weight on it, to see if the reading changes.
If it does, it may be possible to lubricate the scale. That may
eliminate the problem. If the problem exists or persists, it's better
to tap the scale every time to see where the reading comes to rest.


All that said, my postal scales have been quite consistent in its
readings. They are adjustable to get better accuracy, but like I say,
accuracy is not important when comparing two weights on the same
scale.



if you stripped it the insulation doesn't matter in this calculation.

1 foot of 12GA copper wire should weigh .316 oz. What did your samples
weigh?

AWG Copper Wire Table
AWG Diam. (mils) Circular mils Ohms/1000ft Feet per Pound
12 80.8 6529 1.619
50.59





.

Relevant Pages

  • Re: checking weight on a moving belt
    ... A product is moved at a certain speed on a conveyor belt over a scale ... which registers the product's weight. ... It's then necessary to integrate the reading over ...
    (sci.physics)
  • Re: Piuhsups and center of mass
    ... position with the hands on the scale and gets a weight reading of 77 ... That a pushup for that person is comparable to lifting 77 lbs in a ... The weight you're supporting on your hands is different in the ... That's how I got the 77 lb reading. ...
    (sci.physics)
  • Re: Has Electric wire gotten smaller for the same guager?
    ... old and weighed it on my postal scale. ... tap the scale with the weight on it, to see if the reading changes. ... Circular mils Ohms/1000ft Feet per Pound ...
    (alt.home.repair)
  • Re: Axle/tire capacity
    ... There are only a few things that can cause more weight to be on the ... rear axle then the front. ... Maybe the very edge of the scale gives a false reading? ...
    (rec.outdoors.rv-travel)
  • Re: Some advice for Learnwell
    ... me in pedagogy class and I didn't see the wisdom of it until much ... are reading through the ninth position. ... What scale system do you use or have you devised your own? ... some exercises to help develop sight reading in those areas. ...
    (rec.music.classical.guitar)