What is a primary feature that must be included in the design of handhole enclosures?

The primary feature that must be included in the design of handhole enclosures is load-bearing capacity. Handhole enclosures, which are often utilized in underground electrical installations, are subject to various loads from both the soil above and any potential foot traffic or vehicular traffic that may occur over the location of the enclosure.

Ensuring that these enclosures have the appropriate load-bearing capacity is critical for the safety and functionality of the electrical system they contain. If an enclosure cannot support the weight above it, it could collapse, leading to damage to the electrical components inside, as well as creating hazardous conditions for users and maintenance personnel.

While waterproof seals are important for protecting the components from moisture intrusion, and temperature control may be relevant to certain installations, the fundamental requirement remains that the enclosure must be able to withstand the loads it will encounter in its intended environment. Aesthetic design, while it can contribute to the visual appeal of an enclosure, is not a critical factor in the structural integrity and operational function of the handhole.