Commercial kitchen electrical requirements in Calgary

CCT 01The equipment schedule comes first

Nobody can size a kitchen’s electrical until the equipment is chosen. The equipment schedule, prepared by the kitchen designer or the operator, lists every appliance with its location, and the electrical designer turns each line into a circuit, a disconnect and a share of the panel.

Alberta Health Services wants the same list. Its guide for new food businesses asks for a plan that shows the location of all equipment, including refrigerators, freezers, dishwashers, the exhaust canopy, hot holding equipment and the cookline, along with lighting details and specifications. ¹ One accurate schedule serves the health plan review, the building permit and the electrical design.

Late equipment substitutions are a frequent cause of electrical change orders in kitchen fit-outs. Freeze the schedule before the electrical drawings are issued for permit, and price any change against it.

CCT 02Hood suppression interlocks and the other trades

The City of Calgary says an NFPA 96 exhaust and fire-suppression system is required for cooking with griddles, broilers, woks, fryers, ranges and stoves that can produce grease-laden vapours or smoke. Where the building has a fire alarm system, a fire in the hood or ducts discharges the suppression system, which must then alert the fire alarm system. The City lists a mechanical permit for these systems. ²

When the suppression system discharges, the standards that govern the hood require the fuel and power to the cooking appliances under it to shut off, and keep them off until the system is reset. That single event touches four trades:

• The hood and fire-suppression contractor supplies the hood, the suppression system and its release mechanism, with its micro-switch contacts.
• The gas fitter installs the gas shut-off valve that closes on discharge, under a gas permit.
• The electrician wires the shutdown of electric cooking equipment (commonly a shunt-trip breaker or a contactor), the exhaust fan and make-up air interlocks, and the hood lights, under the electrical permit.
• The fire alarm contractor adds the monitored connection to the building’s fire alarm. Calgary requires both an electrical permit and a building permit to alter a fire alarm. ³

Each trade needs its own trade permit, applied for by that contractor. ⁴ Write down who supplies the contacts, who wires them and who witnesses the test, because the interlock only works if all four pieces are in someone’s scope. Fire alarm alterations are covered on the fire alarm systems page.

CCT 03GFCI in commercial kitchens

A ground-fault circuit interrupter trips when current leaks to ground, for example through a wet worker or a damaged cord. The Canadian Electrical Code requires ground-fault protection for receptacles near sinks and in other wet or damp locations, and recent editions have widened where it applies. In Alberta, work permitted from April 1, 2025 follows the 2024 edition, CSA C22.1-24. ⁵ Which kitchen receptacles need protection depends on that edition’s rules and on the layout, so the designer confirms it on the drawings.

Two planning points matter to an operator:

• Nuisance tripping. Some refrigeration, ice machines and older cooking equipment leak enough current to trip a GFCI. A tripped reach-in cooler overnight is a food-loss event. Placing receptacles, choosing equipment and planning dedicated circuits together reduces it; removing protection the code requires is not an option.
• Reset access. GFCI devices and breakers should be reachable by staff, not hidden behind equipment that is bolted down.

An existing installation that met the code in force when it was built does not have to be upgraded simply because a new edition is in force, but new and modified work must meet current rules. ⁶ Reusing a previous tenant’s kitchen wiring therefore needs a survey against the new layout.

CCT 04Load, three-phase supply and the utility bill

A kitchen’s connected load is the sum of its nameplates, but the service is not sized on that sum. The electrical designer applies the CEC’s demand rules to the schedule to arrive at the calculated load for the tenant feeder and panel, then checks it against what the landlord delivers to the premises. The three-phase kVA calculator converts kW, kVA and amps for planning, but it does not replace that calculation.

Many Calgary retail bays and plazas are served at 120/208 V, three-phase, and much commercial cooking equipment is built for 208 V three-phase. Equipment ordered at 240 V or 600 V to suit a different building will not match. The voltage guide explains the two common systems, and three-phase power covers adding it where a bay only has single-phase.

Kitchens also change the utility bill. ENMAX bills larger commercial sites on demand in kVA, and billing demand is the greatest of metered, ratchet or contract demand, with the ratchet at 90% of the highest kVA peak in the last 365 days. ⁷ A site moves to the D310 class once it registers a monthly peak above 150 kVA twice in 365 days. ⁷ Starting every appliance at once on the first busy morning can set a peak the operator pays for all year, so staged start-up and load control are worth discussing with the designer. If the building service itself is short, the fit-out becomes a commercial service upgrade.

CCT 05Walk-in coolers and freezers

A walk-in is several electrical loads, not one: the condensing unit (often on the roof or an exterior pad), the evaporator and its fans inside the box, defrost heaters on freezers, door-frame heaters that stop doors freezing shut, and the box lights. Each needs its own circuit and a disconnect the service technician can lock off at the unit.

Split the scope clearly. The refrigeration contractor normally supplies and sets the box and the refrigeration equipment, runs the refrigerant lines and wires controls within its own package. The electrician supplies power to each component and the disconnects. Remote condensing units add roof penetrations, curbs and the structural questions that come with them.

Walk-ins also gate the opening date. AHS’s approval inspection checklist expects coolers operating and able to hold food at 4 °C or less, and freezers holding food below 0 °C, ideally below −18 °C. AHS will not do the final approval inspection until construction is complete and all equipment is installed and operational. ¹ That means permanent power, the electrical inspection and refrigeration start-up all have to be complete before the health inspection, not after it.

CCT 06AHS plan review, the business licence and the fire inspection

A restaurant in Calgary answers to the City, the provincial safety codes system and Alberta Health Services. Their approvals interlock.

Alberta Health Services. AHS asks operators to submit plans at least six weeks before they want to start construction. For businesses in the City of Calgary, the plans go directly to the City’s planning department, which circulates a copy to the local Environmental Public Health office. Once the food handling permit application is submitted, AHS says it will try to schedule the approval inspection within 7 business days of receiving the required documents. ¹

The City. A development permit is needed if the proposed business does not match the space’s approved use, and a building permit is needed for changes to the space. Most businesses in commercial premises need a Fire Prevention Bureau inspection before the business licence is issued, booked through 311, and the City says it can take up to 5 business days for an inspector to visit. The licence is issued once the outstanding approvals, including the AHS inspection, are complete. ⁸

The occupancy sequence. After all required inspections are signed off, the contractor books the occupancy or final inspection through 311, and a new business gets its licence afterwards. ⁹ The electrical permit and its inspections sit inside that chain. The commercial electrical permits guide covers them.

CCT 07The restaurant tenant improvement timeline

A kitchen fit-out follows the general tenant improvement process, with more gates. The order below shows what waits on what. Durations not published by an authority are left to quotes and suppliers.

1. Lease and work letter. Confirm the power delivered to the bay (rating, voltage, phase), the metering arrangement and who pays for any service change.
2. Equipment schedule. Frozen before the electrical design.
3. Change-of-use development permit, if needed. A permitted change of use is $190 and about 5 business days; a discretionary one is $624 and 10 to 12 weeks. ⁴
4. Building permit and AHS plan review. Planning approval must be in place before the building permit is issued. ⁴ A complete minor tenant improvement building permit may be issued within 21 calendar days. ⁹
5. Trade permits. Electrical, gas, mechanical (hood) and, if altered, fire alarm.
6. Long-lead equipment. Hood, walk-in, panels and any transformer, each on a supplier-quoted lead time.
7. Rough-in, then the interlock test with the suppression, gas, electrical and fire alarm trades together.
8. Final inspections, AHS approval inspection, fire inspection, occupancy and the business licence.

If the building service has to change, ENMAX needs at least 3 business days’ notice to schedule a disconnect and reconnect, on top of its own design and construction. ¹⁰ The tenant improvements page covers pricing the electrical scope.