An installation with solid state controls may require which two types of raceways?

In an installation with solid-state controls, it is essential to differentiate between the types of electrical signals and associated noise levels. Solid-state components are sensitive to electrical interference, which can be generated by high voltage or noisy systems.

The correct choice involves 'quiet duct' and 'noisy duct' to ensure that the sensitive circuitry related to solid-state controls operates without interference. A 'quiet duct' is designed to house low-voltage control circuits and signal lines that need to remain free from electromagnetic interference, while a 'noisy duct' is intended for high-voltage circuits or those producing significant electrical noise. By using both types of raceways, installation practices minimize interference and ensure the reliable operation of solid-state controls.

This careful separation of low and high voltage wiring is crucial to maintain system integrity and performance in the context of solid-state technology, which is more susceptible to noise compared to traditional electromechanical systems.