All wiring for smoke control systems must be fully enclosed within continuous what?

The correct answer is that all wiring for smoke control systems must be fully enclosed within continuous raceways.

Raceways serve as protective pathways for electrical wiring and are essential for maintaining safety and reliability, particularly in smoke control systems where environmental conditions can be extreme. They are designed to protect wiring from physical damage, moisture, and other environmental factors that could compromise electrical integrity. In the context of smoke control, using raceways ensures that all electrical components are adequately shielded from fire and smoke, which is crucial for the operation of systems designed to manage smoke during a fire event.

While conduits also protect wiring, the term "raceway" is broader and encompasses multiple types of protective structures, including conduits. Cables, while they can also be used in some electrical installations, do not provide the same level of environmental protection as raceways when it comes to smoke control systems. Housings can refer to enclosures for devices but do not specifically provide the continuous protection that raceways do for wiring systems. Therefore, the requirement for continuous raceways is vital for meeting safety codes and ensuring that smoke control systems function effectively.