[Andy A.]

Often a better option then tape is heatshrink tubing. It is a thin walled plastic tube that comes in a variety of sizes. When exposed to heat it contracts around exposed wires and terminations forming a tight durable insulation.

It isn't great for all terminations, but it does pretty good. It's particularity useful for insulating the solder cups on custom made serial and gameport connectors. The best part is that, unlike tape, it won't slowly gunk up and fall off. It also looks professional and can be used to color code wires.

I would also recommend that teams use insulated or partially insulated crimp connectors. The very small price premium you pay is more then off set in the cost of tape and time you'd spend doing it after the fact.

-Andy A.