What is required for the room housing switchboards totaling 1000KV or larger?

A room housing switchboards totaling 1000 kV or larger must employ non-combustible materials that provide a two-hour fire rating to enhance safety and limit the risk of fire hazards. This requirement is in line with fire safety regulations, which aim to protect both the equipment and the individuals who may be working in or near these high-voltage areas.

Using non-combustible materials helps prevent the spread of fire and ensures that the structural integrity of the room is maintained during an emergency. The two-hour fire rating indicates that the materials will withstand exposure to fire for at least two hours before failing, providing sufficient time for evacuation and potentially allowing suppression measures to be initiated.

Other material choices, such as wooden materials, plywood walls, and plastic sheeting, do not meet the necessary fire safety criteria for such environments. They may be more susceptible to ignition, contributing to flame spread and overall risks in a high-voltage installation where fire safety is paramount.