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Electrical Safety in Milking Parlors

Wet floors, stainless steel, animals and a lot of electrical equipment make the milking parlor a place where small electrical faults matter. Cows can be very sensitive to stray electricity.

Why are parlors a special case?

Parlors are wet, humid and full of metal, with pumps, vacuum systems, cooling equipment and lighting working close to people and animals. Washdowns spray water around electrical equipment. A small fault that is harmless elsewhere may be serious here.

Because animals are in contact with floors and metal fittings, they can feel low levels of electricity that people may not notice.

Ask your electric utility whether they have advice for farms, since many offer help with investigating animal behavior concerns.

• Wet floors and washdown spray
• Metal stalls and fittings
• Many electrical devices close together
• Animals in direct contact with the floor
• Ask your utility whether farm staff can assist
• Record changes in behavior and milk flow

What are the signs of an electrical problem?

Cows that are nervous at entry, reluctant to enter the stall, kick off units, hold up milk or avoid drinking may be reacting to stray electricity. A tingle felt by workers when touching metal is another sign. Breakers that trip often and equipment that fails often can point to a problem.

These signs can also have other causes, so ask a qualified professional to investigate.

Track milk flow and behavior changes by date in a simple notebook, since patterns help specialists find the cause.

• Nervous or reluctant cows
• Cows refusing to drink or hold up milk
• Tingles felt by workers
• Frequent breaker trips

Who should investigate?

Stray voltage and related problems need a licensed electrician with experience in dairy facilities and often involve the electric utility. Your milking equipment dealer and your veterinarian can add information. Many utilities have staff who help dairy farms.

Do not try to test or correct wiring yourself. Keep notes about what you see and when.

Share your records with the electrician, your veterinarian and your equipment dealer, so they can work as a team.

• Licensed electrician with dairy experience
• Electric utility
• Milking equipment dealer
• Veterinarian

What protective measures should you ask about?

Ask about ground-fault protection for wet areas, proper grounding and bonding of metal parts, and equipment and fittings made for washdown locations. The details depend on your building and local rules, and an electrician can explain them.

Replace damaged cords, cover plates and fixtures right away. Keep outlets and panels protected from spray.

Ask what testing will be done and how results will be explained to you, before work begins.

• Ground-fault protection in wet areas
• Grounding and bonding of metal parts
• Washdown-rated equipment
• Prompt replacement of damaged covers and cords

What habits help workers stay safe?

Keep cords off wet floors, avoid hosing electrical equipment and dry hands before touching switches and plugs. Shut off power before servicing equipment as the manual directs, and follow lockout practices.

Encourage workers to report tingles, sparks, smells and animal behavior changes. Make reporting easy and free of blame.

• Keep cords off wet floors
• Avoid hosing electrical gear
• Dry hands before switches
• Report tingles and sparks
• Follow lockout practices before servicing
• Make reporting easy and free of blame
• Keep a notebook of changes in cow behavior
• Share notes with your electrician and vet

How do you maintain the system?

Have the parlor's electrical system inspected on a regular schedule by a qualified electrician. Include grounding, wiring, panels, controls and protective devices. Keep records of repairs and changes.

Plan upgrades when you add equipment such as new pumps, milking units or cooling systems. Check capacity before buying.

Add the parlor to your regular farm electrical inspection list and schedule it for slow periods.

• Schedule regular professional inspections
• Check capacity before adding equipment
• Keep records of repairs and changes
• Include grounding, panels and controls

What about emergencies?

If someone is shocked, call 911 and do not touch the person until the source is off or safe. If animals are affected, call your veterinarian and an electrician. In case of fire, get everyone out and call 911.

Know where the main shutoff is and make sure all workers can find it quickly.

• Call 911 if someone is shocked
• Do not touch a person still in contact
• Know the main shutoff
• Call a veterinarian and electrician if animals are affected
• Keep emergency numbers posted in the parlor
• Practice a shutoff drill with new workers
• Plan an exit route for animals and people

Last reviewed: November 12, 2026. Written by the Farm Safety Editorial Team. See our editorial policy.