Understanding Fire Detection: What Exactly is a Fire Detector?
A "fire detector" isn't a single device — it's a family of technologies. Learn the differences between smoke, heat, multi-criteria, and flame detectors.
Addressable vs. Conventional Fire Alarm Systems
The engineer's guide to choosing between addressable and conventional fire alarm systems — cost, wiring, scalability, and code requirements compared.
Motor Protection Essentials: MCA, MOP & How to Size Them
Step-by-step guide to calculating Minimum Circuit Ampacity and Maximum Overcurrent Protection for motors — with real-world examples.
NEMA Enclosure Types: Choosing the Right Rating
NEMA 1, 3R, 4, 4X, 12 — what each rating means, when to use which, and common specification mistakes engineers make.
Load Calculations & Transformer Sizing: A Practical Guide
Demand factors, diversity factors, and step-by-step transformer kVA sizing with worked examples for commercial buildings.
Receptacle Layout: CEC Requirements & Design Tips
CEC Rule 26-712 spacing, GFCI requirements, wire sizing decisions, and the most common inspection failures to avoid.
VFD Cable Selection: Why Standard Cable Won't Work
PWM switching, reflected wave voltage peaks, and bearing currents — why THWN fails in VFD applications and what to specify instead.
Short Circuit & Selective Coordination Explained
How to design overcurrent protection that isolates faults without cascading blackouts — TCC curves, LSIG breakers, and ASCC calculations.
EV Charging Without a Service Upgrade: How EVEMS Changes the Game
How to add 50 EV chargers to an existing building without a $180,000 service upgrade — using CEC Section 86 and EVEMS power sharing.
The 5% Rule: Why Your Long Cable Runs Are Failing CEC Inspection
CEC Rule 8-102 voltage drop explained — formulas, conductor resistance tables, and a worked example for a 150m parking garage feeder.
Designing Tier III Data Centers: The Electrical Architecture Behind 99.982% Uptime
Tier classifications, 2N vs N+1 UPS architectures, PUE optimization, and the AI/HPC power density challenge transforming data center design.
DALI vs. 0-10V: Choosing the Right Lighting Control Protocol
The head-to-head comparison every electrical engineer needs — wiring, scalability, cost, and energy code compliance for modern lighting systems.
Transformer Overcurrent Protection: CEC Rule 26-256 Solved Step by Step
Primary OCP sizing, panelboard minimum ratings, and conductor sizing for 15–225 kVA dry-type transformers — with solved CEC examples.
Arc Flash Hazard Analysis: What Every Building Owner Needs to Know
IEEE 1584 incident energy calculations, PPE categories, legal requirements in Ontario, and why an arc flash study could save lives — and your liability.
Generator Sizing & Step Loading: Avoiding the #1 Emergency Power Mistake
kW vs kVA, motor starting transients, step loading sequences, and CEC Section 46 — the complete guide to emergency power that actually works.
Grounding vs. Bonding: The CEC Distinction Every Electrician Gets Wrong
System grounding, equipment grounding, and bonding — CEC Section 10 decoded. Why earth is a terrible fault return path and what actually saves lives.
The 7 Types of Power Problems That Are Silently Damaging Your Equipment
Transients, sags, swells, harmonics, interruptions — IEEE 1159 power quality problems classified, explained, and solved with real protection strategies.
Power Factor Correction: Stop Paying Utility Penalties Every Month
What power factor actually is, why Ontario utilities penalize below 0.90, how to size a capacitor bank, and the ROI that pays for itself in 12 months.
Emergency & Exit Lighting: The OBC and CEC Requirements That Get Buildings Rejected
Battery duration, illumination levels, exit sign rules, and CEC Section 46 — the compliance guide that prevents occupancy permit delays.
Electrical Room Design: The CEC Clearances That Kill Floor Plans
Working space rules, door requirements, dedicated room constraints, and the coordination failures that cost contractors thousands in rework.
HVAC Electrical Coordination: VFDs, Motor Controls & Why the Mechanical Schedule Is Never Enough
VFD sizing, disconnect rules, MCA/MOP calculations, and the coordination checklist that prevents costly field changes between electrical and mechanical trades.
Solar PV System Design & Net Metering: The Ontario Engineer's Guide
CEC Section 64, the 120% rule, inverter sizing, rapid shutdown, and Ontario net metering — from P.Eng design to utility interconnection.
Service Entrance Design: Utility Coordination That Makes or Breaks Your Timeline
Load letters, CT cabinet sizing, service conductors, and the 4–16 week utility coordination timeline every project manager needs to know.
AFCI Requirements: The 2024 CEC Changes That Affect Every Residential Project
Which circuits need AFCI, combination vs branch types, nuisance tripping solutions, and the expanded 2024 CEC scope for dwelling units.
Toronto Hydro Connection Guide: From Application to Energization
Supply offerings, pad-mount vs vault transformers, the 10-step connection process, and EV charging procedures for Toronto projects.
Conduit Fill & Raceway Sizing: CEC Table 8 Explained
Maximum fill percentages, conductor areas, EMT vs rigid vs PVC sizing, derating factors, and the most common raceway design mistakes.
What Should We Write About Next?
Tell us what engineering topic you'd like us to cover. We prioritize the most requested subjects from our community.
Get New Articles Delivered
Subscribe to receive technical insights and code updates from our P.Eng team — no spam, just engineering.