In my first real job out of college, I worked in the Manitoba Hydro (large electrical utility) electrical panel shop, learning how the large electrical panels used in generating station control rooms and transmission stations are built. All wiring in these panels is done with switchboard class wire with similar temperature resistance specifications as we use in our aircraft systems. All wiring was neatly gathered and then tied together using a waxed cord that laid flat and held tight. To remove it, side cutters were the best tool. As the plastic industry evolved, the wire wraps or Tie-Wraps came on the market. They have mostly  replaced the waxed cord as fast and convenient method of gathering wires into bundles. I don’t like tie wraps. They are OK for temporary wiring gathers as you add more and more conductors to your bundle but once done they must be replaced with an approved wire tying cord. Why? Nylon tyraps are not temperature matched for the wire in your aircraft. They will slash your arm when you reach up into that black hole behind the panel. Most builders do not properly twist the excessive wrap lead off when done. They cut them off with side cutters, usually at an angle, rarely flush with the locking pin of tywap. This leaves a collection of razor sharp nylon stubs waiting for your bare skin to pas over.  I advise spending the 20 bucks for a roll of wire tying cord and learn the tying trick. The results are professional looking and not hazardous to the touch.