What is the maximum allowable space between a panel enclosure and its cover?

The maximum allowable space between a panel enclosure and its cover is 1/4 inch. This specific limitation is put in place to ensure adequate protection against potential electrical hazards and to safeguard the internal components of the panel. A gap of more than 1/4 inch could allow foreign objects or moisture to enter the enclosure, which could jeopardize the safety and functionality of the electrical system. This standard helps maintain the integrity of the enclosure, ensuring that electrical components are shielded from dust, debris, and accidental contact. Maintaining this gap is also essential for grounding continuity and heat dissipation, which are critical in preventing overheating and promoting overall safety in electrical installations.