Neutral Replacement

Troublesome levels of neutral-to-earth voltage can arise from such conditions as:

  • High resistance neutral or grounding connections (either on or off the farm),
  • Neutral imbalance currents on or off the farm,
  • Undersized neutrals, or
  • Fault currents to earth or to equipment grounding conductors,

Corrections must be made and the remaining voltage assessed. Possible corrections can include:

  • Rewiring the grounding system to insure proper bonding of all electrical connections, and
  • Replacement or upgrading of undersized service conductors which will reduce neutral conductor voltage drop contributing to the stray voltage problem.

If the farmstead electrical system has long secondary neutrals, a four-wire service to a building is allowed by the National Electrical Code. In a four-wire system, the grounding bus is not connected to the neutral bus at a building service; a fourth wire is used to carry the ground back to the primary service where the grounding and neutral buses are connected and grounded to earth. The four-wire system will reduce the contribution of the secondary neutral drop to the neutral-to-earth voltage at the building service.