Industrial Electrician and Warehouse Electrical Contractor in South Florida

Warehouses, light industrial and flex space

What a warehouse or industrial space needs from its electrician

What warehouse and industrial electrical work is about

Warehouses, light industrial units and flex space have a different electrical profile from offices and stores. There are fewer loads, but larger ones: motors, compressors, conveyors, dock equipment and chargers, most of them three-phase. The lighting hangs 25 or 30 feet up over racking and forklifts. And the building is often delivered as a shell with a service and a house panel, leaving the tenant to work out whether that is enough.

This page covers what is specific to warehouse and industrial spaces. For the general remodel sequence, see our commercial remodel and tenant improvement page; for a ground-up building, new construction electrical. The full range of work sits under commercial electrical services.

Warehouse lighting: high-bay LED and controls

Good warehouse lighting is laid out to the racking, not to the ceiling grid. The same fixture that lights an open floor well can leave the lower shelves of a narrow aisle dark.

• Optics for the layout. Aisle-distribution optics for racked areas, wider distribution for open floor, staging and docks. Mount fixtures over the aisles, not over the tops of the racks.
• Controls per aisle. Occupancy sensors on each aisle turn lights up when a forklift enters and down when it leaves. In a large warehouse most aisles are empty most of the time, so this is where the energy savings are.
• Daylight. Fixtures near skylights, clerestories and open dock doors can dim when daylight is enough.
• Heat and dust. Many South Florida warehouses are not air-conditioned. Choose fixtures rated for the ambient temperature under the roof deck in August, not the temperature at the floor.

Florida's energy code includes occupant sensor and daylight-responsive control provisions, and a state-commissioned comparison of the current code modeled a non-refrigerated warehouse among its prototype buildings (FSEC report for the Florida Building Commission). Whether a lighting retrofit brings those controls with it depends on its scope, so settle that with the designer before ordering. Our commercial lighting and controls page covers retrofits, controls and parking lot lighting.

Aisles and exit routes also need emergency and egress lighting that works when the high-bays do not, and it has to follow the racking when the racking moves.

Clear heights, racking and lift access

At 30 feet, every fixture, conduit run and junction box is a lift job. That shapes cost and sequence more than the wiring itself.

• Install before the racking if you can. Once racks are loaded, lifts cannot reach the ceiling between them, and work over stored product needs aisles cleared.
• Plan the lift. Scissor lifts for open floor, boom lifts where racks or equipment are in the way. Check the slab and any mezzanine can carry the lift, and book it for the whole ceiling phase, not day by day.
• Coordinate with the sprinklers. Fixtures and conduit must not block sprinkler heads. Agree the ceiling layout with the fire sprinkler contractor before anything is hung.
• Racking changes move the lights. A new rack layout often means relocating fixtures and sensors. Flexible whips and plug-in fixture connections make that faster.

Three-phase motor loads and equipment connections

Industrial equipment is mostly motors, and motors bring their own questions: starting current, disconnects, and the difference between the voltage on the nameplate and the voltage in the building.

• Voltage and phase. Many warehouse and industrial buildings have 277/480V three-phase service, with transformers stepping down to 120/208V for receptacles and small loads. Smaller flex units may be 120/208V or even single-phase. Order equipment for what the building has. Our post on three-phase power, whether you have it and whether you need it explains how to check.
• Nameplate data. Each machine's full-load current, voltage and horsepower set its circuit, overload protection and disconnect. Get it from the equipment supplier before the machine arrives.
• Disconnects. Each motor needs a means of disconnect, located where the operator and the maintenance technician need it.
• Drives. Variable frequency drives soften motor starting and save energy, but they generate heat and electrical noise. Give them ventilated locations and follow the manufacturer's cabling and grounding instructions.

Our dedicated circuits and equipment connections work covers machine hookups. When the total load outgrows the building, see commercial service and switchgear and when a business outgrows its electrical service.

Compressors, conveyors and busway

• Air compressors. Often the largest single motor in a light industrial unit. Put the compressor and dryer on their own circuits, in a ventilated location, with a disconnect in sight of the unit. A compressor room that cooks in summer shortens compressor life.
• Conveyors and sortation. The conveyor integrator designs the controls, motor starters and emergency stops. The electrician provides the power feeds to the control panels and motors, and the pathways the integrator's cabling follows. Agree that split in writing before bidding.
• Busway. Overhead plug-in busway lets machines be added or moved by plugging a new tap into the bus instead of running a new circuit from the panel. It costs more up front and pays back where the layout changes often. For a fixed layout, conventional feeders are usually cheaper.

Dock equipment

Dock equipment is a small load repeated many times, which is why it is easy to under-count. For each door, list:

• The overhead door operator.
• A hydraulic or air-powered dock leveler, if fitted.
• A vehicle restraint, if fitted, with its interlock and signal lights.
• A dock light to see into the trailer, and a receptacle at the door.

Ten doors of that adds up to real panel space. Exterior dock lighting and fittings face rain, salt air and hurricane-season wind, so choose rated enclosures. In Miami-Dade, the High-Velocity Hurricane Zone brings the most demanding requirements in the Florida Building Code, and building-envelope products such as doors need a product approval (Miami-Dade County), which the door supplier handles.

Forklift and EV charging

Forklift battery charging is regulated by OSHA. Its powered industrial truck standard requires battery charging installations to be in areas designated for that purpose, with facilities for flushing and neutralizing spilled electrolyte, fire protection, protection of the charging equipment from damage by trucks, and adequate ventilation for fumes from gassing batteries (OSHA 29 CFR 1910.178).

• Pick the charging area early, near the panel if possible, away from racking, and with bollards or barriers.
• Get the charger model before sizing circuits. Industrial chargers are often three-phase, and lithium-ion chargers have different electrical and space needs from lead-acid.
• Plan for growth. Adding two chargers later costs more than leaving capacity and spare conduit now.

Fleet vans, trucks and employee cars are a separate project. See commercial EV charging and our post on what drives the cost of commercial EV chargers.

Surge protection and power quality

South Florida's lightning season and utility switching events are hard on drives, controls and chargers. Surge protection at the service and at panels feeding sensitive equipment is inexpensive compared with a failed drive or a sortation controller down for a day. Separate sensitive electronics from large motor circuits where you can, and keep grounding connections tight.

Preventive maintenance and infrared scanning

Industrial electrical systems fail at connections: lugs that loosen under vibration and heat cycles, contactors that wear, and dust in enclosures. KRW offers preventive maintenance for commercial and industrial buildings: planned inspection, tightening and cleaning, with findings reported in order of urgency.

Infrared thermography is a common part of industrial maintenance programs. A thermal camera, used while equipment is under load, shows hot connections before they fail. If you want an IR scan as part of a maintenance program, ask us about it when we scope the work, and schedule it when the building is at a normal working load.

Any work on or near energized equipment raises arc flash and electrical safety questions for the owner. Our post on NFPA 70E and arc flash for building owners explains what owners are responsible for. Before hurricane season, check rooftop and exterior disconnects and the bolting of anything on the roof.

What to decide early

1. The equipment list with nameplate voltage, phase and current for every machine.
2. Whether the building's service can carry it, including growth.
3. The racking layout, before the lighting layout is fixed.
4. The forklift charging area and charger models.
5. Who designs and wires conveyor and machine controls, and who provides only power.
6. The permit path; see commercial electrical permits.

Planning a project? Send the drawings and equipment list through our contact page or call (305) 359-7312.