166. Precautions against fire in ventilation appliances.
(1)Every mechanical ventilator on the surface shall be installed in a suitable fire proof housing.(2)In the case of every fan other than an auxiliary fan installed belowground, the coal or other carbonaceous material exposed in the sides, roof and floor shall be covered with masonry or other fire resistant sealant as protection against fire, for a distance of not less than 5 metres in every direction from the fan.(3)The covering of every shaft sealed off or covered for ventilation purposes, every fan drift, duct or casing and every part of a mechanical ventilator or fan within such drift, duct or casing, and every air-crossing and ventilation door shall be constructed of fire-proof material:Provided that this regulation shall not apply to the small lid of a shaft-covering operated by the rope cappel.
