Grounding components for electrical installations include which?

• A. Transformers only
• B. Cables only
• C. Equipment enclosures only
• D. Metal conduit, raceways, and junction boxes

Answer: (D)

The grounding path in many electrical installations is formed by metal parts that stay bonded together to create a continuous, low-impedance path back to the service grounding. Metal conduit, raceways, and junction boxes are designed to be bonded and to carry fault current safely, so they themselves act as part of the grounding conductor. When these metal components are properly bonded, they ensure equipment enclosures and other metal parts are at earth potential, reducing shock risk and providing a reliable path for fault currents to trip protective devices.

Transformers and cables are energy-carrying devices and, by themselves, aren’t the grounding components used to establish the grounding path. Equipment enclosures can be metal, but the option focusing on metal conduit, raceways, and junction boxes specifically highlights the parts that reliably form and maintain that grounded path when bonded.