These factors make controlling stray voltage a major problem. Voltage gradients across the ground or floor due to wires faulted in the earth. Electric fence wires shorting directly to equipment or energizing pipes and equipment. The severity can vary from a fault with no visible effect to a complete short circuit. When short circuits occur, all conductive materials, such as stainless steel milk lines and pipe fencing, become energized.
Wood also can conduct electricity when it is wet.
To correct the problem, faulty equipment should be repaired or replaced immediately by someone with proper training. The three-wire electrical supp y line helps reduce the problem when the fault first occurs. Voltage gradients through the earth or across a floor occur when an underground wire faults to earth. This often happens when the insulation of underground wires not rated for direct burial becomes damaged. Typically, the wires have not been buried at the proper depth.