NEIEP Mechanics Practice Exam

What is required when using strain wire as a ground?

1. Connections to the main panel

2. Insulated covering

3. Weatherproofing

4. Permanent anchoring

The correct answer is: Insulated covering

Using strain wire as a ground requires insulated covering to ensure electrical safety and prevent the inadvertent conduction of electricity. Strain wire, which is often subject to mechanical stress and environmental elements, must be insulated to avoid direct contact with people or equipment that might otherwise be affected by stray voltages. Insulation helps to protect against electrical shock hazards and enhances the wire's longevity by preventing corrosion and reducing the risk of short circuits. It is essential for maintaining the integrity of the grounding system, especially in environments where moisture or other conductive materials may come into contact with the wire. While connections to the main panel, weatherproofing, and permanent anchoring are all important considerations in grounding systems, they do not specifically address the need for insulation when using strain wire. Insulation is a critical component for safety and reliability in this context.