Virginia Code Title 45.2. Mines, Minerals, and Energy § 45.2-804. Surface transformers

A. Any surface transformer that is not isolated by being elevated at least eight feet above the ground shall be enclosed in a transformer house or surrounded by a suitable fence at least six feet high. If the enclosure or fence is of metal, it shall be grounded effectively. The door to the enclosure or the gate to the fence shall be kept locked at all times unless a person who is authorized to enter the gate or enclosure is present.

B. Any surface transformer that contains flammable oil and is installed near a mine opening, in or near a combustible building, or at any other place where such transformer presents a fire hazard shall be provided with a means to drain or to confine the oil in the event of a rupture of the transformer casing.