Twist drills grab in thin material and drill three-lobed holes and can distort the material where you want it to be flat at the seal. 20mm is a bit small for a Greenlee style punch. Even a cheap one is better than nothing. Are you tired of drilling sloppy holes in electrical boxes? Learn the secret to drilling perfect holes every time! In this video, we'll show you a simple and easy-to-follow technique to ensure accurate and precise holes in electrical boxes. more. What tools do I use to drill clean holes in both the plastic and aluminum enclosures so that the cable glands fit snugly without any gaps? I tried searching for M20 drill bits and thread taping, but couldnt really find anything solid. Wiring Connections Strip wires → connect to terminals (phase, neutral, ground) → arrange neatly. Ensure tight contact, correct wiring, and enough space for heat dissipation. Hole saws are frequently used as well. The table below highlights the most commonly used power tools when you install distribution box setups: When you install distribution box. Then drill holes with the appropriate size by an electric drill, and insert expansion bolts.
