Common Electrical Questions, Answered

Straight answers from a licensed Ontario electrician — real 2026 prices, honest advice, and what actually matters. 36of the questions GTA homeowners ask most, organized by topic. Can’t find yours? Call 416-837-4038 and ask. The advice is free.

Costs & Pricing Permits & Hiring Panels & Power Troubleshooting Safety & Wiring EV Charging & Upgrades Buying & Selling a Home Commercial

Costs & Pricing

What electrical work really costs in the GTA — hourly rates, project quotes, and what drives the price.

How much does an electrician cost in Toronto?Toronto electrician rates explained by a licensed contractor: hourly rates, service call minimums, flat-rate project pricing, and what affects your quote in 2026.Read the answer →How much does it cost to rewire a house in Ontario?What it costs to rewire a house in Ontario in 2026 — price ranges by size, what drives the cost up, knob-and-tube and aluminum removal, and how the project works.Read the answer →How much does a home standby generator cost in Ontario?What a home standby generator costs in Ontario in 2026 — unit and installation pricing, whole-home versus essential-circuit sizing, portable alternatives, and what affects the quote.Read the answer →How much does basement apartment electrical cost in Ontario?Real costs to wire a legal second unit in Ontario: code requirements that drive the price, sub-panels vs separate meters, panel capacity, and how the ESA inspection process works for basement apartments.Read the answer →Why is my electricity bill so high?A licensed electrician's checklist for high hydro bills in Ontario: heating and cooling, aging appliances, phantom loads, time-of-use pricing mistakes, and when a high bill signals an electrical problem.Read the answer →

Permits & Hiring

ESA permits, what you can legally DIY, and how to choose a licensed, insured electrician.

Do I need a permit for electrical work in Ontario?When ESA permits are required for electrical work in Ontario, what they cost, what happens if you skip one, and how the inspection process works.Read the answer →Can I do my own electrical work in Ontario?What Ontario homeowners can legally DIY, what requires a Licensed Electrical Contractor, the real risks of DIY wiring, and how ESA inspections apply to homeowner work.Read the answer →How do I verify an electrician is licensed in Ontario?Step-by-step guide to checking an electrical contractor's ECRA/ESA licence in Ontario, red flags to watch for, and the questions to ask before hiring.Read the answer →How do I choose a good electrician in Ontario?How to choose a good, trustworthy electrician in Ontario — the licence and insurance checks, the questions to ask, the red flags to avoid, and why the permit matters.Read the answer →

Panels & Power

Panel size, 100 vs 200-amp service, fuse boxes, and the signs your panel needs an upgrade.

What size electrical panel does my house need?How to size an electrical panel in Ontario: when 100 amps is enough, when you need 200, what load calculations actually measure, and how EVs and heat pumps change the math.Read the answer →Should I upgrade from 100-amp to 200-amp service?Whether to upgrade from 100-amp to 200-amp electrical service — when it's necessary, when 100 amps is enough, what it costs in Ontario, and how a load calculation decides.Read the answer →What are the signs I need an electrical panel upgrade?The signs your electrical panel needs upgrading — full breaker slots, tripping, fuse boxes, flickering lights, a hot panel — and which are safety emergencies in Ontario homes.Read the answer →Is a fuse box safe, or should I replace it?Whether a fuse box is safe and when to replace it with a breaker panel — the real risks of fuses, over-fusing, insurance issues, and upgrade costs in Ontario.Read the answer →How long does an electrical panel upgrade take?Hour-by-hour timeline of an electrical panel upgrade in Ontario: utility disconnect, installation, power restoration, ESA inspection, and what can extend the schedule.Read the answer →

Troubleshooting

Why it's happening and what to do — tripping breakers, dead outlets, flickering lights, and more.

Why does my circuit breaker keep tripping?The three reasons a circuit breaker keeps tripping — overload, short circuit, and ground fault — how to tell them apart, what's safe to fix yourself, and when to call an electrician.Read the answer →Why are my outlets not working but the breaker isn't tripped?Troubleshooting dead outlets when no breaker appears tripped: hidden GFCI resets, half-tripped breakers, loose backstab connections, and when to call an electrician.Read the answer →Why is half my house without power?What it means when half your home loses power: lost utility leg, main breaker failure, why some 240V appliances act strange, and why this one is a real emergency.Read the answer →Why do my lights flicker?Why house lights flicker — from harmless voltage sag to dangerous loose connections — how to tell normal flicker from a warning sign, and when flickering means call an electrician.Read the answer →Why do my lights dim when the AC turns on?Normal vs concerning light dimming when AC or appliances start: compressor inrush current explained, the warning patterns, hard-start kits, and when dimming means panel or service problems.Read the answer →How do I reset a GFCI outlet?How to reset a tripped GFCI outlet step by step, why one GFCI can kill power to several outlets, why GFCIs trip, and when a GFCI that won't reset needs an electrician.Read the answer →Why does my smoke detector keep beeping or chirping?Decode smoke detector chirps and false alarms: low battery vs end-of-life, the 10-year replacement rule, interconnect wiring faults, and Ontario's smoke alarm law.Read the answer →

Safety & Wiring

Warning signs, GFCI requirements, knob-and-tube, and what to do in an electrical emergency.

What should I do if an outlet sparks or smells like burning?What a sparking or burning-smelling outlet means, which sparks are normal versus dangerous, the immediate steps to take, and why arcing outlets are a fire emergency in Ontario homes.Read the answer →What are the warning signs of faulty wiring?The warning signs of faulty or unsafe electrical wiring in a home — what each symptom means, which are emergencies, and what older Ontario homes should watch for.Read the answer →Where are GFCI outlets required in a home?Where the Ontario Electrical Safety Code requires GFCI protection — bathrooms, kitchens, outdoors, garages, basements, and pools — and how to add it to an older home.Read the answer →How do I know if I have knob-and-tube wiring?How to identify knob-and-tube wiring in your home — what it looks like, where to look, the warning signs, and why it matters for insurance and safety in Ontario.Read the answer →How many outlets can be on one circuit?How many outlets you can safely put on one circuit in Ontario, the 12-outlet rule of thumb, why load matters more than count, and which areas need dedicated circuits.Read the answer →Are space heaters safe to run overnight?Space heater safety from an electrician's perspective: why overnight use is the risk peak, circuit overloading and extension cords, and the permanent alternatives that remove the risk.Read the answer →

EV Charging & Upgrades

Home EV charging, hot tubs, and appliance upgrades — what your home needs to handle them.

Do I need a permit to install an EV charger in Ontario?Whether you need a permit to install an EV charger in Ontario — when ESA notification is required, the difference for plug-in versus hardwired, costs, and who can do the work.Read the answer →Level 1 vs Level 2 EV charger — which do I need?Level 1 vs Level 2 EV charger compared — charging speed, cost, installation, and which suits your driving — to help Ontario homeowners choose the right home charger.Read the answer →How much does it cost to charge an EV at home in Ontario?Real Ontario home EV charging costs on time-of-use and ultra-low overnight rates, cost per full charge, annual costs vs gasoline, and how charger installation pays back.Read the answer →Does a hot tub need its own breaker?Hot tub electrical requirements in Ontario: dedicated circuit sizing, GFCI protection, the disconnect rule, bonding, installation costs, and whether your panel has the capacity.Read the answer →Do tankless water heaters need an electrical upgrade?Electrical requirements for tankless water heaters in Ontario: why gas units barely matter electrically, why whole-home electric tankless usually triggers a panel upgrade, and what heat-pump water heaters need instead.Read the answer →

Buying & Selling a Home

Electrical questions that come up during a home purchase, sale, or renovation in Ontario.

What does an electrical inspection check when buying a house?What a licensed electrician checks during a pre-purchase inspection, how it differs from a home inspection, what the findings are worth in negotiation, and when to book it.Read the answer →Is it safe to buy a house with aluminum wiring?Buying a home with aluminum wiring in Ontario: actual fire risk, insurance requirements, remediation costs, how to negotiate it, and the pre-closing checklist.Read the answer →Do pot lights increase home value?How pot lights affect resale value in the GTA: what realtors and staging data show, which rooms matter most, cost vs payback, and why ESA-permitted installation matters to buyers.Read the answer →

Commercial

Electrical questions from GTA business and commercial property owners.

How often do commercial buildings need electrical inspections in Ontario?Commercial electrical inspection requirements in Ontario: what the Fire Code mandates annually, what insurers require, thermal imaging intervals, and how maintenance programs prevent downtime.Read the answer →

Licensed & insured electricians

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