Frugal Freddie's tip for stripping large gauge wires:
Use a single edge razor blade or sharp utility knife.
Bend the insulated wire/cable at the point you want to strip it and gently push the tool's sharp edge into the insulation.
Do not "saw" the blade as you risk cutting the conductors.
The insulation will part very easily, popping apart under the bending strain, without cutting any of the copper strands inside.
Turn the wire, re-bend and repeat cut until the insulation is fully circumcised.
Pull the severed insulation end off with fingers, pliers, forceps, whathaveyou.
This technique also works very well for the outer jacket of larger multi-wire or shielded cables too.
For smaller gauge wires it's easier to just use one of the stripper tools shown above.
Use a single edge razor blade or sharp utility knife.
Bend the insulated wire/cable at the point you want to strip it and gently push the tool's sharp edge into the insulation.
Do not "saw" the blade as you risk cutting the conductors.
The insulation will part very easily, popping apart under the bending strain, without cutting any of the copper strands inside.
Turn the wire, re-bend and repeat cut until the insulation is fully circumcised.

Pull the severed insulation end off with fingers, pliers, forceps, whathaveyou.
This technique also works very well for the outer jacket of larger multi-wire or shielded cables too.
For smaller gauge wires it's easier to just use one of the stripper tools shown above.