778. Precautions against inflammable dust in certain coal mines.

778.     Precautions against inflammable dust in certain coal mines.

The manager of every coal mine must ensure that no vehicle is used for transporting material consisting wholly or mainly of coal dust (not being anthracite dust) along any length of road1 in which there is any electric cable or apparatus, unless the material is so enclosed as to prevent the dust being thrown into the air in the event of the vehicle being upset2.

At every coal mine, other than one in which the floor, roof and sides of the roads are naturally wet throughout, it is the