When an engineer is involved
Many electrical jobs never need an engineer. A homeowner's panel upgrade or a small office lighting retrofit is designed and installed by a licensed electrical contractor. As projects get larger or more complex, a professional engineer registered with APEGA often becomes part of the team.
Common triggers include:
- New buildings and major renovations where the building permit requires professional design
- Large services, switchgear, medium-voltage equipment or significant changes to existing distribution
- Assembly, care, institutional and high-hazard occupancies
- Fire alarm systems, emergency power and life safety systems in larger buildings
- Industrial processes, hazardous locations and complex motor control
- Landlord or owner requirements, even where the code would not insist
Whether a seal is required for your project is set by the permit authority and the applicable codes. Ask early, because it changes the schedule. See commercial permit drawings for what the drawings contain.
Who does what
The roles are simple to describe and easy to blur on a busy job:
| Role | Typical responsibilities |
|---|---|
| Owner or tenant | Defines needs, budget and schedule; approves changes |
| Electrical engineer | Designs, prepares and seals drawings, answers questions, reviews installation |
| Electrical contractor | Prices and builds the work, pulls the electrical permit, books inspections |
| Safety Codes Officer | Reviews where required and inspects for code compliance |
| Architect or prime consultant | Coordinates disciplines on building projects |
On smaller commercial jobs, roles can overlap. The architect may hire the electrical engineer, or the contractor may bring one in. Whatever the contract structure, make sure everyone knows who the designer of record is.
The engineer is responsible for the design. The contractor is responsible for installing it to the drawings and the code. When the two do not agree, the question goes back to the engineer through a formal request for information, not a hallway decision.
How the project usually runs
- Concept. The owner explains what the space must do. Rough loads and service needs are estimated.
- Design. Layouts, single-line diagrams, panel schedules and specifications take shape.
- Permit set. The engineer seals the drawings and they are submitted for review where required.
- Tender and award. Contractors price the work from the drawings.
- Construction. The contractor submits shop drawings, raises RFIs and builds. The engineer reviews on site and issues deficiency lists. The Safety Codes Officer inspects.
- Close-out. Testing, commissioning, as-built drawings and any professional-involvement letters the building permit requires.
Design-assist and design-build
Traditional projects separate design and construction. Two alternatives are common:
- Design-assist. The contractor joins during design to advise on buildability, phasing, lead times and cost, while the engineer remains the designer of record.
- Design-build. One team, often a contractor with an engineer engaged, delivers both design and construction under one contract.
For tenant improvements, retrofits in occupied buildings and anything with long-lead equipment like switchgear, early contractor input often saves time. Shutdown windows, existing conditions and equipment availability are hard to see from a drawing board.
Existing drawings in older Edmonton buildings are often out of date. A site survey of panels, feeders and spare capacity at the start avoids redesign later.
Before the first design meeting
You will get a better design, faster, if you bring the right information to the first meeting with your engineer and contractor:
- A clear description of how the space will be used, including hours, occupancy and any special equipment
- Equipment lists with electrical nameplate data where you have it, such as kitchen equipment, compressors or servers
- Any existing drawings, panel schedules and past permit records for the building
- Landlord requirements, tenant handbook and shutdown rules
- Your target dates, especially move-in or production start, and any fixed constraints
- Future plans: EV charging, solar, extra rooftop units or growth in staff can change today's service sizing
If budget is tight, say so early. Engineers can design to a budget much more easily than they can cut a finished design.
Keeping everyone aligned
- One set of current drawings. Mark every revision clearly and retire old copies on site.
- Written RFIs and answers. They protect everyone when questions come up months later.
- Change management. Price and approve changes before work proceeds, especially when they affect load or equipment.
- Shop drawing review. Confirm substituted equipment meets the design before it is ordered.
- Shared reporting. Alberta Electrical's online job management gives owners and engineers visibility of progress, inspections and deficiencies.
We work with engineers on switchgear upgrades, plant retrofits and commercial fit-outs, and provide electrical design and layout directly where a seal is not required.
Common questions
Can an electrical contractor design the system without an engineer?
For many smaller projects, yes. Where the authority or codes require professional design, an engineer must prepare and seal the drawings.
Who pulls the electrical permit on an engineered job?
Typically the electrical contractor, who is responsible for the installation. The engineer's sealed drawings support the permit and any plan review.
What is an RFI?
A request for information: a written question from the contractor to the designer when the drawings are unclear, conflict or do not match site conditions.
Does the engineer inspect the work?
The engineer conducts field reviews to confirm the work follows the design. That is separate from the Safety Codes Officer's inspection for code compliance.
Codes and permit rules change and every building is different. For work on your system, talk to a licensed electrician and your local permit authority.