If you're familiar with the game Paper, Rock, Scissors, the rock always trumps the scissors for the obvious reason that it's harder. So I agree with the others that you should stick with the rugged tools designed for that work.
That said, every electrician needs a good knife, and my candidate (as someone above also recommended) is the Cold Steel Recon 1. Specifically, the clip point, partially serrated model.
The serrated version of this knife is recommended because, unlike most partially serrated knives,, the serrations on the Recon 1 make up two-thirds of the blade. These serrations are fine enough to do limited cutting on drywall, plus it leaves enough of the blade at the front plain, so you could strip wire. The blade's serrations also are perfect for cutting through small branches. Its teflon coating reduces friction in removing it from tight spots, too. The steel is AUS8, which is a good balance between hardness and toughness, so it would be well suited for your purpose. It can be easily opened with one hand, and it's one of the strongest, toughest folders on the planet; its axis lock is probably the strongest locking mechanism a folding knife can have. And best of all, the price is very modest.