What is a common requirement for electrical wiring in buildings?

A common requirement for electrical wiring in buildings is that it must be sheathed or enclosed to ensure safety. This requirement is crucial as it protects the wiring from physical damage, hazards such as moisture and corrosion, and reduces the risk of electrical shock or fire. By sheathing or enclosing the wiring, the conductors are insulated and safeguarded from external influences that could compromise their integrity.

The sheathing also provides a clear indication of the wiring's purpose and capacity, aiding in compliance with safety codes and facilitating maintenance. Building codes typically mandate specific materials and types for sheathing or enclosing electrical wiring to ensure consistent safety measures across different construction projects.

This safety measure is essential in preventing accidental exposure to live wires, which can lead to serious injuries or fatalities. Adhering to these requirements not only protects the property but also the occupants who use the electrical systems within the building.