# wire size

Discussion in 'General Electronics Chat' started by samjesse, Mar 1, 2010.

1. ### samjesse Thread Starter Senior Member

Sep 14, 2008
212
0
Hi

I googled for #14 wire size and found it to be 1.6mm in diameter. is that including or excluding the insulation?

So when I go to buy it from jaycar in Australia, we do not use the US system here, but mm. not sure if that will in/exclude the insulation.

thx

2. ### SgtWookie Expert

Jul 17, 2007
22,198
1,797
The 1.6mm does not include the insulation; it is the diameter of the copper wire.

3. ### JDT Well-Known Member

Feb 12, 2009
658
87
In the metric world, electric wire is normally sized by it's cross sectional area.
14 AWG corresponds to about 2mm(squared). Standard sizes are 1.5mm(squared) or 2.5mm(squared).

Alternatively, (no. of strands)/(diameter of each strand in mm) is used.

According to my "Cable and Wire Book":-
28/0.30 = 1.98mm(squared) or
35/0.30 = 2.46mm(squared)

The insulation type and thickness is another whole ball game!