Wire gauge tool needed.

[1793]

best choice is PLASTIC, NONCONDUCTIVE digital caliper.

4" so it'll fit in tight places.

they are $3.96 each on amazon.

https://www.amazon.com/Digital-Cali...28&sr=8-2&keywords=4"+plastic+digital+caliper

and a wire gauge dimension chart.

I've looked at the website from the link above and one of the photos shows a label listing Carbon Fiber.

As someone else asked, isn't Carbon Fiber conductive?

 

[MAC702]

Good question. What most call "carbon fiber" is actually a carbon fiber reinforced polymer. Its conductivity would depend on construction details and percentages.

I use pure carbon blocks to conduct welding current from a bench to a weldment, and this is at relatively low voltage.

 

[mivey]

If the rod sticks out of the opposite end of the "ruler", it is for depth measuring. If it does not stick out, then I don't know.

That makes sense. Never used it for that.

 

[mivey]

you could essentially open it up all the way and nip off that rod. like Frank said, its there so that it can be used as a depth gauge.

Well I can't snip it off now that I know what it is for.

 

[FionaZuppa]

Well I can't snip it off now that I know what it is for.

:thumbsup:

but to note, if the caliper is 4" long and you measure a 2"dia wire, the caliper in whatever location/position its in is now 6" long, so you have to be careful because of the extra stuff sticking out. but if its a dedicated $4 tool for just doing wire mic'ing then nip it off, etc.