Commercial New Build Equipment Power

The electrical system should be built around the equipment that will actually be installed.

OTC reviews information such as:

• Equipment voltage

• Amperage

• Phase

• Horsepower

• MCA and MOCP where applicable

• Disconnect requirements

• Manufacturer instructions

• Final equipment location

For larger equipment, approved cut sheets and submittals should be reviewed before rough-in whenever possible.

New commercial buildings may require dedicated power for equipment such as:

• HVAC units

• Commercial kitchen equipment

• Refrigeration

• Pumps

• Motors

• Compressors

• Manufacturing machinery

• Conveyors

• Chargers

• Specialty equipment

OTC sizes the circuit around the actual equipment requirements rather than simply installing a standard circuit near the equipment location.

Many larger commercial loads operate from three-phase power.

Depending on the project, equipment may require:

• 208V three-phase

• 480V three-phase

• 208Y/120V distribution

• 480Y/277V distribution

Not every piece of equipment is three-phase, and not every commercial building uses the same distribution voltage.

OTC verifies the equipment requirements against the building's electrical design before installation.

Larger equipment may require more than a standard branch circuit.

The installation may include:

• Dedicated feeder

• Larger conduit

• Equipment disconnect

• Local panel

• Transformer

• Distribution panel

• Motor-related equipment

For facilities with multiple large loads, placing distribution closer to the equipment can provide a cleaner system than running every circuit back to the main electrical room.

New construction may use transformers when the building distribution voltage does not match the equipment or local branch-circuit requirements.

A common commercial arrangement is:

480V Distribution → Transformer → 208Y/120V Panel → Equipment & Branch Loads

OTC coordinates the transformer, primary feeder, secondary distribution, grounding, and downstream equipment as part of the complete system.

Many pieces of commercial equipment require a local disconnecting means.

OTC installs and coordinates disconnects for equipment such as:

• HVAC

• Motors

• Pumps

• Compressors

• Kitchen equipment

• Machinery

• Specialty systems

The disconnect location should work with both the electrical requirements and the final equipment layout.

New construction gives the project an opportunity that remodel work does not:

We can plan the electrical path before the building gets in the way.

Equipment-power requirements may affect:

• Underground conduit

• Slab penetrations

• Equipment pads

• Wall rough-in

• Ceiling pathways

• Electrical-room layout

• Feeder routing

A missed equipment requirement during underground or rough-in can become significantly more expensive after concrete is poured and finishes are installed.

A circuit can be correctly sized and still be installed in the wrong place.

OTC coordinates equipment power with:

• Architectural plans

• Mechanical plans

• Kitchen equipment plans

• Structural conditions

• Vendor submittals

• Final equipment layouts

The goal is to have the disconnect, connection point, and required power where the equipment actually lands.

Equipment frequently changes after the original construction documents are issued.

A substituted piece of equipment may have a different:

• Voltage

• Amperage

• Phase

• Connection type

• Disconnect requirement

Those changes can affect the electrical scope.

OTC reviews updated equipment information during construction so changes are identified before final connection whenever possible.

Large equipment loads need to be considered as part of the building's overall electrical design.

A facility with significant:

• Commercial kitchen loads

• Manufacturing equipment

• Large HVAC systems

• Refrigeration

• Motors

• Charging equipment

may require larger panels, transformers, switchgear, or service capacity.

For major new-build distribution, OTC works from the engineered electrical design and coordinates the construction around the approved load calculations and equipment requirements.

When practical, new construction should consider reasonable future growth.

That may include:

• Spare breaker space

• Additional conduit pathways

• Distribution capacity

• Space for future equipment

• Accessible electrical rooms

The goal is not to oversize the building unnecessarily.

It is to avoid creating a brand-new electrical system that immediately becomes difficult to expand.

A complete new-build equipment-power scope may include:

• Equipment schedule review

• Underground conduit

• Feeders

• Panels and subpanels

• Transformers

• Dedicated circuits

• Disconnects

• Three-phase power

• Equipment connections

• HVAC power

• Kitchen equipment power

• Machinery power

• Testing

• Labeling

• Final verification

OTC coordinates the equipment power from the early construction stages through final startup.