I have been developing a set of plastic wire gauges to help determine sizing. The set will include 5 separate pieces, and cover both copper and aluminum wiring common within the last 20 years, up to current.
Copper sizing will include 14-12-10-8-6-4-2-1 and also a 1-0 and 2-0
Aluminum will cover stranded wiring sizes 6-4-2-1 and also 2-0 and 4-0
I should have the first ones available by next month, if anyone is interested. The set should cost around $25.00
I realize this wont cover all wire sizes, and also wont cover the older ones, but should give you a general ideal of sizing for most modern applications.
Naturally these are not intended to be used on “live” electrical wiring, so nobody kills themselves.
If you would like a set you can email me at email@example.com. Once they’re ready then I can mail them out.