Which piece of equipment must have substantial guards in hazardous locations?

Portable lighting equipment must have substantial guards in hazardous locations because it is often exposed to challenging environmental conditions that could pose risks to safety. This equipment is frequently used in areas where there are potential dangers such as flammable substances, moisture, or physical impacts, making it crucial to protect the light fixtures from damage that could lead to electrical hazards, sparks, or fires.

By having guards, the portable lighting equipment is shielded from accidental contact, debris, and other hazards that could compromise its integrity and safety. This is particularly important in settings such as construction sites, industrial environments, or locations where flammable materials are present.

In contrast, light switches, circuit breakers, and wall sockets, while they all play significant roles in electrical systems, do not share the same level of exposure to hazardous conditions that portable lighting may encounter. Therefore, the design and installation of portable lighting require additional protective measures to ensure safe operation in potentially dangerous situations.