What are test lead wires?

Test lead wires refer to electrical strand wires constructed primarily for conducting test leads, fixtures, assemblies and patch cords. These are typically made of fine strands of conductive copper and feature a coating of PVC or silicone. The latter acts as the insulator and provides protection and flexibility to the test lead wires to suit a wide range of testing needs and applications. 

Importance of test lead wires

Test lead wires are important for establishing a temporary connection between the electrical test equipment and the electrical circuit being tested. Their insulation materials - EPR (Ethylene Propylene Rubber), PVC or silicone, offer higher dielectric strength and better flexibility for wider applications. They are used extensively in research laboratories as well as training workshops for precise and secure electronic testing. Test lead wires are available in different lengths, colours and insulator options. 

Things to consider while buying test lead wires

If you are planning to buy test lead wires, then you need to consider certain important aspects, including the following specifications:

• Consider choosing a test lead wire that has stranded tinned copper. 
• Choosing the right insulation is one of the most important factors to consider while buying test lead wires. Choosing premium grade, colour-coded polyvinylchloride (PVC), polyethylene (PE) or rubber is highly recommended as these will provide more flexibility to the wires and ensure optimum performance even when dealing with high currents.
• Pick test lead wires with a temperature rating of -20°C to 60°C for rubber insulation, -25°C to 60°C for PVC insulation, and -20°C to 80°C for PE insulation.