Stripping wire looks simple until you nick a strand or cut through the conductor. A few minutes spent choosing the right stripper and following a consistent technique will save far more time on the job.

Choose the tool for the wire

Automatic strippers are fast for repetitive work on common sizes. Adjustable pliers-style strippers handle a wider range but need a steady hand. For very fine or fragile conductors, precision strippers reduce the risk of damage.

The technique that avoids nicks

• Set the stripper to the exact conductor size, not the outside diameter of the insulation.
• Close the tool lightly, rotate a quarter turn, then pull. Do not bite down and drag.
• For multi-core cable, strip the outer sheath first with the appropriate notch, then each core individually.

Common mistakes

Strand damage is invisible after the terminal is fitted but shows up later as a hot joint. Stripping too much insulation leaves exposed copper beyond the terminal. Stripping too little leaves insulation inside the barrel and prevents a proper crimp.

Keep them sharp

Blades dull with use, and a dull blade is the main cause of nicked conductors. Replace the blade cassette or the tool when stripping starts to require extra force.

Used consistently, a good stripper produces a clean, square end with every strand intact, which is the foundation of a reliable connection.