Question 1
While troubleshooting a lighting control system using 0-10 V dimming, you discover that the luminaires remain at full brightness regardless of dimmer setting. The dimming pair is landed together with the line conductors in a junction box. What is the most likely problem?
Question 2
In a fire alarm system, why must fire alarm circuits be installed in separate raceways or compartments from normal power circuits in many situations?
Question 3
A hospital renovation requires essential loads to be supplied by an emergency generator within a specified time after normal power loss. Which system design consideration is most critical?
