Where must electrical equipment and wiring methods in portable structures have mechanical protection?

Electrical equipment and wiring methods in portable structures must have mechanical protection where they are subject to physical damage. This requirement is essential to ensure the safety and integrity of the electrical systems. Portable structures may frequently be moved or relocated, which increases the risk of physical damage to any exposed electrical components and wiring.

When electrical installations are at risk of being bumped, struck, or otherwise physically disturbed during the operation of the structure, robust protection is needed to prevent potential hazards such as short circuits, equipment failure, or electrical shock. Thus, design choices must incorporate measures such as conduit, enclosures, or other suitable protective devices that can resist impact and physical stress.

In contrast, locations not subject to damage, low traffic areas, or high humidity environments do not inherently require the same level of mechanical protection since the risks of damage to electrical equipment in those situations are considerably lower. Therefore, the emphasis on protection specifically applies where there is an identified risk of physical damage.