Normally, wires have conductive cable and insulation thickness. Always drilled holes should be equal to or larger than the wire size. When you drill for screws, this guide will help you to find the drill bit sizes for screws.ĭrill bit size is very important for wirings. You can use below drill bits when you drill a hole for 3 conductor wires. When you drill for these wires, you should know the diameter of the wire before selecting a drill bit. Mostly used gauges are 10, 12, 14, 16, 18, and 20. Normally, we use 1-conductor (1-20 gauge), 2-conductor (10-20 gauge), and 3-conductor (10-20 gauge) cables for many purposes in both DIYs and industrial. 3 conductor wires have different size gauges. Wire Gaugeĭrill bit sizes for 2 conductor wires Drill Bit Size for 3 Conductor Wiresģ conductor wires and 3 core cables are the same in name and have 3 conductive cables inside the single wire. It helps to find any drill bit related to the mm or inches easily. I have prepared a guide to find drill bit sizes in inches and mm. When you drill a hole for 2 conductor wires you can select drill bit sizes from below table. Wire gaugeĭrill Bit Sizes for Single Wires Drill Bit Size for 2 Conductor WiresĢ conductor wires, double wires, and 2 core cable wires are the same wires that have 2 wires in a single cable.īoth cables are coated with electrical insulations. So let’s see what are the suitable drill bit sizes for each wire size. When you choose a drill bit for a wire, it should be more or equal to the diameter of the wire (including insulation and conductor). Standard wire sizes and insulation thickness for Poly(Vinyl Chloride) Insulations Drill Bit Sizes For Single Conductor Wires As a result of this, the wire diameter will be increased due to this layer. According to the voltage and current, the layer’s thickness varies.

These standard wires are insulated with Poly (Vinyl Chloride) in order to prevent the current leaking. The drill bit size should be equal or more than the wire size

Standard drill bit size chart