Electrical resistance of gaff tape?

[Madejyathink]

(I'm not sure of exact terminology here, but...) How is the voltage resistance of electrical tape measured? And how does gaffer tape compare to that? I seem to remember hearing that gaff tape is decently resistant, but I can't find that anywhere else now. Is there any specific numbers associated with it?

Yeah, I know, probably a rather newbish question, it's just something I started thinking about.

[FireStarter]

It isn't going to conduct well at all, so technically you can use it to insulate. Just don't use it for anything that requires certification.

What use did you have in mind for it?

[Madejyathink]

Nothing specific, actually. More just a "if I had to, would this work" kind of thought. So yeah, I don't think I'd ever come across that situation while at work, I'm just being inquisitive. Is there a means of rating or assigning a number to how well these various tapes insulate?

[FireStarter]

Electrical tape is deemed satisfactory for use as an insulator by testing, and is assigned a maximum voltage rating. Usually when you buy a roll, the label will say something like "Use with no more than ____ volts" however, gaff tape wouldn't be tested or rated in this manner since electrical insulation is not its intended purpose.