# Current capacity of wire

Discussion in 'Electrical and Wiring' started by rahulb, Oct 14, 2019.

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1. Oct 14, 2019

### rahulb

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Hi Everyone,

I have a wire similar to on image below: its rating is 14/76. I assume that it has 14 strands of 0.0076 inch diameter wire.

What could be current capacity of this wire? is there any formula to calculate it?

thanks

2. Oct 14, 2019

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any markings on the insulation?

3. Oct 14, 2019

### bud16415

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If those sizes and conductor count are correct that wire would have a cross sectional area of .41 sq mm.

.0076/2 = .0038R .0038x.0038 = .00001444 x 3.1416 = .00004536 x 14 = 000635 sq in.

or .41 sq mm.

If you look up that square millimeter size on a wire chart or calculator you get roughly 26 AWG wire equivalent.

The amount of current will depend on the length and resistance and other factors, but if my figures are correct you will be in the .5 to 1.0 Amp range.

You can confirm the strand size with measurements with micrometers and count the strands.

Others will be along that may have access to specs on that wire nomenclature. That’s my guess at this point.

Welcome to the forum.

4. Oct 15, 2019

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Do you have an intended use in mind for the wire?

5. Oct 17, 2019

### Steve123

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Or else that's an SWG spec on the wire size. Where are you? -- where did you get the wire ?

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