Which part of an electrical system houses conductors?

The correct answer is the raceway system, which is specifically designed to house and protect electrical conductors. A raceway system can include conduits, trays, and ducts that provide a pathway for electrical wiring, shielding the conductors from physical damage and environmental hazards while also organizing and securing them in place. This ensures that the conductors remain safe, accessible, and compliant with electrical codes.

While the sub panel, breaker box, and service entrance all play crucial roles in an electrical system, they do not primarily serve the function of housing conductors in the same way that a raceway does. The sub panel and breaker box distribute electricity to different circuits and provide overcurrent protection, while the service entrance is where electrical power first enters a building. However, it is the raceway system that directly provides a dedicated management system for conductors, ensuring they are installed safely and efficiently.