What Size Stranded Wire is This?

It is probably a European stranded cable with 0.25mm^2 area. Very common here.

I read in alt.binaries.schematics.electronic that Watson A.Name - "Watt Sun, the Dark Remover" wrote (in ) about 'What Size Stranded Wire is This?', on Fri,

It doesn't seem to be a metric cable, either, unless my arithmetic is off. 7/0.2 mm is a standard size. 7/0.25 has also been made, but that's bigger than 0.009 in per strand.

Some odd size cables are made for railway signalling.

I read in alt.binaries.schematics.electronic that Ban wrote (in ) about 'What Size Stranded Wire is This?', on Sat, 14 Feb 2004:

But it calculates to 0.287 mm^2. 7/0.2 mm is 7/0.0078 in, not 7/0.009 in.

Yeah, that's what I was beginning to think, too.

JW said it didn't seem like metric, either. I didn't think about trying that way.

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Thanks. I was wondering what it'd be in mm. I think I found it on Belden's website.. Go to this URL

It says that it's five conductors #22 AWG, which is 7 strands of 30 AWG. Could be that my calipers are measuring the wire too tightly or something. The 8445 number sounds familiar, but it's been more than a decade since I ordered any of it, and I'm not sure.

The reason I'm interested is that I'm using some of it for DC power, and I wanted to know what gauge the wire is, so I can figure out what kind of voltage drop I might get over several feet. I paralleled a couple conductors, so looking at the wire tables, it looks like that's equivalent to a single 19 AWG conductor.

Draw an amp through a precision (1%) 1 ohm resistor, (1 watt or more) connected with 100 feet of the wire. Adjust the source for 1 volt across the resistor, then measure the drop in the wire. My guess is that would be as accurate as, (if not more accurate than) a wire table. Heck - you might not need a precision resistor. Even a 10% error should not matter if you use this as hook up wire for most applications.

........

.009 is only ONE significant digit. Try measuring it better, is it .0090 or .0091 or even .0095? 9+-1 is a 10%error which translates to

Size

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Thanks for the idea. I've done this procedure with the measuring of the wire size a number of times before, and it's always proved a reliable way to come up with the right wire size. It's just not quite right this time, that's all. I think I clamped the calipers too tightly on the several strands I measured, and got one silly milliInch too little for the measurement. If I add that silly little milliInch, and use 10 thousandths for the wire size, it comes out as a 22 gauge stranded wire.

seven

says

Yeah, I think you discovered my problem. I think I measured the strands too tightly, because I used 10 thou instead of 9 thousandths of an inch, and it comes out 22 AWG. Thanks.

I read in alt.binaries.schematics.electronic that Watson A.Name - "Watt Sun, the Dark Remover" wrote (in ) about 'What Size Stranded Wire is This?', on Sun,

There is a manufacturing tolerance on the strand size. The cable is OK irrespective of strand size if it meets the resistance or voltage-drop specification.

"Watt

snipped-for-privacy@corp.supernews.com>) about 'What Size Stranded Wire is This?', on Sun,

for

wire.

Square wire? ;-) Or maybe oval? It might have been stretched when it was installed in the ceiling over a decade ago. That might be the reason for the smaller size.