Electrical Tools and Hand Skills
Core Concepts
Identify and use hand tools: screwdrivers (flat, Phillips, Pozidriv), pliers (combination, long-nose, side-cutters), wire strippers, crimping tools, hammers, chisels, files, hacksaws, and measuring tools (tape, Vernier caliper, micrometer). Understand power tools: drills, angle grinders, and their safety. Know the importance of using the correct tool for the job (e.g., insulated tools for electrical work). Understand marking out, cutting, filing, drilling, and tapping. Know how to maintain tools (sharpening, insulation inspection) and store them safely.
Traps in Questions
- Using a flat screwdriver on a Phillips screw damages the screw and can slip.
- Insulated tools must be used for live work; standard tools are not rated.
- A hacksaw blade should have at least two teeth in the material thickness to avoid snagging.
- Crimping: use the correct die and ensure the crimp is tight; a loose crimp causes overheating.
- Safety: always wear PPE (goggles, gloves) when using power tools.
Worked Example / Rule of Thumb
Example: To strip a 2.5 mm² wire, select the appropriate notch on the wire stripper (usually marked 2.5). Squeeze gently and pull; do not nick the conductor. Rule of thumb: For drilling into masonry, use a masonry bit and hammer mode; for metal, use a HSS bit and cutting fluid. When using a file, apply pressure on the forward stroke only; lift on the return to avoid dulling the teeth.