A new small-commercial build in Stoney Creek (a 5,000 to 15,000 square foot single-tenant box, light industrial flex space, retail with a mezzanine office, automotive bay with a service area) runs on a tight schedule from foundation to occupancy. The electrical scope is what determines whether the schedule holds. Here is how we sequence the work from service drop to ESA final, and where the slip points usually live. For tenant fit-out scope inside an existing building, see our restaurant patio electrical post and the rest of the commercial archive.
The service drop: first conversation with Alectra
Stoney Creek is in the Alectra Utilities service territory. The service-drop coordination is the first piece of work and the one with the longest lead time. The questions Alectra needs answered, in some order:
- What is the calculated service size — typically 200A, 400A, 600A, or 800A on the small-commercial scale we are talking about, with the occasional 1200A on the larger end.
- Is the service three-phase or single-phase? Most small-commercial in this region is three-phase 120/208V, with the larger industrial sites moving to 600V three-phase.
- Underground or overhead service? Underground is increasingly the norm on new construction; overhead is still common on retrofit and rural-edge sites.
- Where is the transformer pad going, if the building needs its own pad-mount transformer?
- What is the metering arrangement — single tenant single meter, or are we landing a CT cabinet for a larger service?
Alectra's design and engineering process for a new service connection can run several weeks to several months depending on whether the existing distribution has capacity, whether new pole-line work or transformer work is needed, and how the application sits in their queue. The single most common project-killer for small-commercial schedules is starting this conversation too late.
Our practice: we file the service application with Alectra the week the building permit is issued, not the week we are framing the panelboard wall.
Service-entrance sizing: the demand-load calc
The service size is the result of a proper commercial load calculation, not a rule of thumb. The OESC has specific demand factors for general lighting and receptacle load, kitchen equipment, HVAC, motor loads, and large appliance loads. We run the calc against the architectural and mechanical drawings, account for diversity in the receptacle load, and add the future-expansion headroom that the owner asks for.
The number that comes out drives a chain of decisions: meter base size, service-entrance conductor size, main breaker rating, main panelboard rating, and the size of the transformer Alectra needs to set. Get the calc wrong and one of those decisions has to be unwound — and unwinding a service-entrance decision once the conduit is buried is a meaningful cost event.
Panelboard layout: design for the next tenant
On a single-tenant build for the owner who is going to occupy it, we can design the panelboard exactly to the operations. Lighting on its own panel section, receptacles on another, HVAC on another, kitchen or shop loads on another. Each section right-sized to its load and labelled correctly.
On a build that will eventually have multiple tenants or that may turn over, the layout decisions are different — generic distribution that can be carved up for tenant sub-meters, dedicated landlord-load panels for common-area lighting and HVAC, and a building riser that supports future sub-feeds without a service-side rebuild.
Brands we install: Schneider Square D I-Line for distribution panels, Eaton Pow-R-Line for the same in their ecosystem, Siemens for general-purpose lighting and receptacle panels. All three are widely supported by every electrician in the region — the next contractor to touch the building does not need to source obscure breakers.
Lighting design: energy code plus the owner's actual operation
Ontario's energy code requires LED at lighting power densities well below the older fluorescent benchmarks. The lighting design needs to hit those targets and also actually do the job — task lighting at workbenches, general illumination at the right level, emergency egress, exterior building and parking lot.
What we look at:
- Interior general lighting. LED high-bay or strip light, depending on ceiling height. Lumens per watt at the latest generation has shifted the math meaningfully in the past few years.
- Task and accent. Drop pendants at workstations, LED strip at retail displays, under-cabinet at coffee bars.
- Daylight harvesting where the building takes daylight. Lutron or Leviton occupancy-and-daylight sensors at perimeter zones, with appropriate dimming control.
- Emergency lighting and exit signs. Battery backup at each unit, monthly and annual test routines per the code. We size by required path of egress and minimum illumination levels.
- Exterior — building face and parking lot. Wall packs, pole-mount parking lot LED, photocell-and-contactor control. The dark-sky considerations matter even in a commercial corridor: full-cutoff fixtures, appropriate colour temperature, sensible mounting heights.
The LED retrofit ROI conversation we covered in our commercial LED retrofit post applies to new construction too — but here the calculation is simpler because we are not paying off existing fixtures, just selecting the right LED package at install.
Fire alarm: design plus monitoring
Most small-commercial buildings in Stoney Creek need a fire alarm system designed under CAN/ULC-S524 and monitored under CAN/ULC-S561. The scope: pull stations at every required egress, smoke and heat detectors per the building code occupancy classification, audible-visual notification appliances throughout, an annunciator panel at the main entrance for the responding fire department.
The system gets designed by a fire-alarm engineer (often our subconsultant), installed by us, verified by a CAN/ULC-S537 verifier, and monitored through a UL-listed monitoring station. The Ontario Building Code occupancy permit will not issue without the verified-and-monitored fire alarm.
Mechanical and HVAC coordination
Rooftop units, walk-in coolers, compressors, exhaust hoods — every piece of mechanical equipment has an electrical disconnect within sight, a properly-sized branch circuit, and motor protection. The HVAC contractor specifies the equipment; we wire to it.
The coordination meeting at framing locates every disconnect, every motor control center, every dedicated panel. The clashes that come up if we skip this meeting: ductwork blocking the planned conduit run to the rooftop, water lines crossing the path to the equipment-pad disconnect, fire-suppression piping landing where the panelboard wants to be. We chalk it out at framing, not at rough-in.
The ESA inspection sequence
A new small-commercial build will see ESA on the rough-in (after wire pulled, before drywall and ceiling tiles), on the service connection (before Alectra energizes), and on the final (before occupancy permit). Each one is a hard gate. The rough-in inspection delay is the most common schedule-slip event in this kind of work — we book it with the inspector as soon as we have a credible date and we keep it tight to the actual readiness so the inspector is not standing in an unfinished building.
The occupancy-permit sequence
Occupancy is a multi-trade event. The building inspector wants the architectural drawings matched. The plumbing inspector wants the DWV and supply. The HVAC inspector wants the units commissioned. The ESA inspector wants the electrical signed off. The fire-alarm verifier wants the system verified. The fire department wants the monitoring confirmed.
The owner who tries to hit a hard opening date (a retail open on a specific Saturday, a restaurant launch tied to a marketing campaign) needs all of these gates to land on or before that date. The most useful thing we do for an owner in that situation is straight scheduling. We tell them, in February, what their realistic occupancy date is given the Alectra timeline, the inspection windows, and the lead times on the equipment we have to source.
What we install on a typical Stoney Creek small-commercial build
- 200-400A three-phase 120/208V service, Alectra-coordinated
- Schneider, Eaton, or Siemens panelboards
- LED lighting with appropriate controls — Lutron Vive or Leviton Decora Smart on commercial-scale jobs
- Verified-and-monitored fire alarm
- Exterior wall packs and pole-mount parking lot LED
- EV-readiness conduit and panel slot per increasingly common municipal requirements
- Mechanical disconnects, motor controls, and panel space for future expansion
When to call us
If you are planning a new small-commercial build in Stoney Creek, Hamilton, Burlington, or anywhere across the Golden Horseshoe, get us into the conversation at the design stage. We do the load calc, file with Alectra, coordinate with the mechanical and architectural teams, and quote the install in writing. Request a pre-design consult for your commercial electrical project.