Here’s a scenario that plays out frequently on industrial projects: A project manager requests “an electrical engineer” to design a PLC control system. Or someone asks for “electronics expertise” to handle power distribution. The engineering firm scrambles to clarify the scope, the schedule slips by a week or more, and everyone’s frustrated before the work even begins.
This confusion between electrical engineering and electronics engineering isn’t a knowledge gap. It’s a vocabulary problem. Both terms involve electricity. Both require engineering expertise. And in industrial settings, both disciplines work on the same facilities, on interconnected systems sharing the same cable trays and equipment rooms. But conflating electrical systems design with electronics circuit design leads to misaligned scopes and coordination gaps that often cost tens of thousands to hundreds of thousands of dollars to fix on mid-sized projects.
Note: Costs, timelines, and technical requirements in this guide reflect typical Canadian industrial projects as of publication. Verify current pricing and regulations for your specific region and project scope, as these factors vary significantly.
This guide clarifies the practical distinction between electrical design and electronics design through the lens of capital projects in oil and gas, petrochemical, energy, and manufacturing sectors across Canada. You’ll understand which discipline handles which systems, where power systems engineering intersects with circuit design through instrumentation and controls (I&C), and how to determine which expertise your project requires.
At Vista Projects, an integrated engineering firm established in 1985 and headquartered in Calgary, Alberta, we’ve coordinated electrical and I&C disciplines across hundreds of industrial projects. The distinctions here come from four decades of multi-disciplinary engineering, where getting the scope right matters for budgets, schedules, and plant safety.
The Core Distinction: Power Systems vs. Signal-Level Systems
Strip away the academic definitions, and here’s what the difference between electrical and electronics engineering comes down to: electrical design handles energy delivery, electronics design handles information processing.
Electrical design encompasses the engineering of power generation, transmission, and distribution systems that deliver electricity from source to end-use equipment. For a deeper exploration, see our complete guide on what electrical design means in engineering. Electrical systems design addresses everything from utility interconnection to motor terminals. This means getting power from the grid (typically in the range of 13.8kV to 25kV from utilities like ATCO, ENMAX, or Hydro-Québec) to every motor, heater, and lighting panel in your plant.
Electronics design focuses on circuits, components, and devices that process electrical signals for control, communication, and computation. In industrial contexts, electronic circuit design means systems that tell equipment what to do and when to do it. These systems operate on milliamps rather than hundreds of amps.
What voltage generally separates electrical from electronics design?
The 50-volt threshold provides a practical demarcation that holds across most industrial cases. Systems above 50V typically fall under electrical design territory. Below 50V, particularly 24V DC power supplies and 4-20mA signal ranges common in process control, the work generally falls under electronics and instrumentation territory. The Canadian Electrical Code (CEC) Section 16 treats these low-voltage systems differently because the engineering challenges, safety requirements, and installation methods differ fundamentally.
Here’s an analogy that works: Electrical design is like designing the road network that delivers fuel to gas stations, handling heavy loads over long distances. Electronics design is like designing the pumps, sensors, and point-of-sale systems at the station, handling information and small-scale operations. Same commodity (electricity), completely different scales.
What Electrical Design Covers in Industrial Facilities
Electrical design handles everything from where utility power enters your facility to the terminals where power connects to equipment. Power systems engineering addresses infrastructure operating at voltages from 480V up to transmission levels. We’ll cover how electrical and electronics intersect through motor control centres in the overlap section below.