What condition requires a worker to perform "hot work" on a distribution panel?

The scenario that requires a worker to perform "hot work" on a distribution panel occurs during an N+1 configuration. In power distribution systems, N+1 refers to a redundancy setup where there is enough capacity to handle power load even if one component fails. This design allows maintenance or repairs to be performed without taking down the entire system.

When working on a distribution panel that is actively supplying power, the task is considered "hot work," which implies that safety precautions must be taken. The N+1 configuration allows for certain components to be serviced while the rest of the system remains operational, necessitating "hot work" conditions.

Performing hot work without proper safety measures can lead to electrical hazards if the equipment is still energized. In contrast, standard UPS operation, offline systems, or during scheduled maintenance typically do not require "hot work" as they usually allow for safe de-energizing procedures to be followed. This separation allows technicians to work safely without the risks associated with live electrical components.