Special Method for Measuring Fine LED Wire Diameter
The wire of contacts is1-pin to19-pin .in my last article, is about how to measure the diameter of a little ball(single pin) with an vernier caliper. Here is a test result of multi-core cable .

10mm2  7 pin  single core diameter as 1.33㎜
16mm2  7 pin  single core diameter as 1.68㎜
25mm2  7 pin  single core diameter as 2.11㎜
35mm2  7 pin  single core diameter as 2.49㎜
50mm2  19 pin  single core diameter as 1.81㎜
70mm2  19 pin  single core diameter as 2.14㎜
95mm2  19 pin  single core diameter as 2.49㎜