![]() When solid wire was used, everything fit perfectly. What I found out later by searching “AWG diameter stranded” is that wire sold as #20 stranded can be 10/30 (10 strands of #30, 35 mil total diameter), 19/32 (37 mil), 26/34 (36 mil), or even 41/36 (36 mil).įortunately for me, the wire was an inductor winding, and I should have been using solid wire anyway. #20 solid wire is nominally 32 mils in diameter. ![]() So an electrical engineer can specify, say, #20 wire, and be assured of a certain current carrying capacity. The most important characteristic of a wire electrically is how much current it can carry, not its total diameter. It makes sense, now that I think about it. Only the yellow will fit into the 35 mil hole L11. The blue wire on the left is AWG #20 stranded, while the yellow wire on the right is #20 solid. That’s when I learned that wire diameter depends not only on the AWG size, but on the number of strands. When the boards came back, I found that the wires I had did not fit into the holes. During design of a recent PC board, I did a quick search for “AWG diameter,” and was presented with a simple table listing the diameter of each gauge. ![]()
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