I put a thick coating of Vaseline over the wires. Cats don't like the texture or taste; and it will not harm the cat. It is a bit messy, and collects ALL the dust bunnies. But it saved my wires and got kitty out of the routine. I kept the Vaseline on for a good 4 months. The first time I wiped it off, she returned to chewing. So I put it back on.

I haven't needed Vaseline on my wires for 2 years!!! Small price to pay for a dust bunny collector, IMO.

And make sure there are plenty of catnip scented toys about for her to chew on, toss about etc. Distract and redirect!