The term "isolation" refers to the electrical separation of all or a portion of the grounded neutral system of a farmstead from the remainder of the system. Isolating part of the grounded neutral system can prevent neutral-to-earth voltage on the non-isolated portion of the system from getting to the animals. A conventional multi-grounded system can be isolated, ahead of the farm main service (whole farm isolation), or at the livestock building (single service isolation).

Consider the safety and operational effects of isolation very carefully. The whole farm can be isolated at the distribution transformer, or by using an isolation transformer following the distribution transformer.

In all cases, some system grounding will be removed from the distribution system, at least during non-fault conditions; and the removal can affect both on-farm and off-farm sources of neutral-to-earth voltage.