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Orlando Cruz, PE, and Supasit Jong, PE

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Figure 3: Like the lighting inverter, the emergency uninterruptible power supply must be UL 924 listed and serve only emergency loads. Courtesy: CDM Smith
Case Study November 12, 2024

Case study: Know the power system codes for emergency tunnel lighting

Understand the codes and standards that are necessary for emergency lighting in a tunnel

By Orlando Cruz, PE, and Supasit Jong, PE
Figure 1: Recessed style emergency lighting unit equipment. Courtesy: CDM Smith
Lighting and Lighting Controls October 30, 2024

Emergency lighting definitions

Know the key phrases when designing emergency lighting systems

By Orlando Cruz, PE, and Supasit Jong, PE
Figure 4: Installed emergency generator set. Other less typical emergency power supplies allowed by the NFPA 70: National Electrical Code include battery energy storage systems, fuel cells, separate utility services (not from same utility substation) and microgrids. Courtesy: CDM Smith
Lighting and Lighting Controls October 22, 2024

How to power emergency illumination systems

There are various requirements for the proper design of emergency power for lighting systems

By Orlando Cruz, PE, and Supasit Jong, PE