• Off-farm sources of stray voltage can be related to primary neutral-to-earth voltages, and can be dealt with by MVEC.

• Common on-farm sources of stray voltage on dairy farms are: worn insulation on wiring, loose wiring connections, improper use of equipment grounds, electrical shorts, unbalanced 120 volt loads, and improper installation of electric fences or cow trainers.

Special requirements for wiring livestock buildings are explained in detail in the Farm Buildings Wiring Handbook. Share this information with any licensed electrician who installs new equipment on your farm or alters any wiring. Be sure to specify that you want all work to be done in accordance with Article 547 of the National Electric Code. In addition, be sure all electrical work is properly inspected as required by state law.

Improper grounding is a safety problem
Proper use of grounding wires on electrical equipment is required in all buildings. However, this is a common oversight on many farms. Improper grounding is not only a cause of stray voltage, but it is also a safety hazard. If you suspect that you have a grounding problem, have a licensed electrician inspect the wiring on your farm to determine if it meets all requirements for livestock buildings.

What to do if stray voltage or a safety problem is suspected
Do not delay. If a stray voltage problem is suspected contact MVEC and we can complete a stray voltage investigation. It is also helpful to have a licensed electrician inspect the wiring on your farm as well.

For more information contact
Mike Dietz
952.492.2313 or 800.282.6832
info@mvec.net