Handhole enclosure covers must require the use of tools to open OR weigh over what minimum weight?

Handhole enclosure covers designed to prevent unauthorized access must weigh over 100 pounds or require the use of tools for opening. This requirement is in place to enhance safety and security for electrical installations, particularly since handhole enclosures often contain high-voltage equipment and wiring. By mandating a minimum weight or the necessity for tools, the National Electrical Code aims to deter casual or unauthorized access, thereby protecting both the integrity of the electrical system and the safety of individuals who may be near it. The heavier weight threshold of 100 pounds serves as a significant barrier against accidental or intentional opening by individuals without proper authorization or knowledge.