I recently started Onsight Electric in Denver, CO. Onsight has a somewhat duel meaning. I'm a rock climber as well. In the rock climbing world, the definition of onsight is to climb a route to perfection (without falling) the first time you climb the route. Which translates to my electrical business as, "doing the job right the first time". My idea for a logo was a climbing rope, possibly tied in a figure 8 (common climbing knot) or possibly a coiled rope. But the ends of the rope are the ends of electrical wire. Either the bare stranded end or possibly a wire nut on the end.