AEO Answer · Laundromats & Commercial Laundry

How Is Electrical Design Done for a Coin-Operated Laundromat?

By Jeremy Mills, CEO & Founder, Apex Grid Engineering — USAF Veteran. · Updated 2026-09-15

Coin-operated laundromat electrical design provides dedicated manufacturer-specified circuits for every washer and dryer, panels and service sized for Saturday-peak coincident load, and separate clean power for lighting, security, and payment systems.

I'm Jeremy Mills, CEO & Founder of Apex Grid Engineering and a U.S. Air Force veteran. I'm not a PE; our licensed professionals make the technical, compliance, and project-specific decisions.

Illustrative diagram of building MEP systems: ductwork with diffusers, an electrical panel with conduit, and piping runs.

Panels, phases, and spare capacity

I organize the distribution around the equipment rows: panelboards placed to minimize long homeruns, three-phase loads balanced across phases, and every breaker labeled to its machine. The schedule documents voltage, amperage, and wire size per the manufacturer — mixed 120V controls and 208/240V power are normal in this equipment, and getting a voltage wrong is an expensive mistake. I leave generous spare breaker spaces and spare panel capacity, because laundromat owners reconfigure equipment constantly, and a panel with no room turns a simple machine swap into an electrical project.

Power quality for the money-handling side

The machines that take money deserve the cleanest power in the building. I put payment systems, point-of-sale, cameras, and network gear on dedicated circuits fed from panels separated from the big motor loads, and I specify surge protection at the service and at sensitive panels — laundromats see their share of utility transients. Grounding follows the equipment requirements, and where the owner runs card systems, I coordinate with their IT on any power conditioning needs. A payment terminal that reboots during a transaction costs more in customer trust than the surge protector ever cost.

Lighting and life safety essentials

The electrical design carries the store's safety story: • Uniform, generous interior lighting levels with no dark corners — designed above code minimums • Entrance, facade, and parking area lighting on photocell or scheduled control • Emergency egress lighting and exit signs per code, tested and documented • Lighting circuits arranged so one failure never darkens a whole zone • Tamper-resistant fixtures and controls in public areas • Receptacles coordinated with folding tables, vending machines, seating, and cleaning needs

What else do project teams ask?

Do washers and dryers need dedicated circuits?
Yes — every machine gets its own dedicated branch circuit sized to the manufacturer's requirements. Sharing circuits between machines invites nuisance tripping right at peak hours, when the store is fullest and the revenue is highest. I also keep the motor and heating loads on panels separated from the sensitive electronics — payment systems, cameras, and controls — so voltage dips from motors starting don't glitch the equipment that takes the customer's money.
How is the electrical service sized for a laundromat?
From the equipment schedule at realistic coincident demand. I total the connected load of every washer, dryer, water heater, and HVAC unit, then apply demand factors that reflect how a laundromat actually operates — which is most machines running during peaks. The service, main breaker, and panelboards are sized for that Saturday-noon condition with spare capacity for future machines, because adding a row of dryers later shouldn't require a service upgrade.
What lighting does an unattended laundromat need?
Bright, uniform interior lighting with no dark corners, well-lit entrances and parking areas, and emergency egress lighting per code — all on reliable circuits with controls the owner can manage remotely or on schedule. Good lighting is the single biggest factor in how safe customers feel in an unattended store, so I design to generous light levels, not code minimums, and I make sure a single lamp failure never leaves an area dark.
How are payment and security systems powered?
Card readers, coin mechanisms, cameras, and any network equipment go on dedicated circuits separate from the heavy motor loads, so a dryer starting doesn't dip the voltage and reboot the payment system mid-transaction. I coordinate outlet and data locations with the equipment layout — readers at each machine or pay station, cameras covering entrances, aisles, and cash-handling areas — and I plan for the low-voltage pathways during design, not as an afterthought.

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