How do I prepare my outdoor electrical systems for winter in the Maritimes?

Preparing Outdoor Electrical Systems for Maritime Winter

New Brunswick's winters bring a unique combination of hazards that outdoor electrical systems must survive — ice storms that coat everything in inches of ice, wet heavy snow loads exceeding 40 lbs per square foot, salt spray along the Fundy and Northumberland coasts, temperatures plunging to -30°C and below, and freeze-thaw cycles that can crack conduit and loosen connections. A few hours of fall preparation protects your outdoor electrical investment and prevents dangerous winter failures.

Pre-Winter Inspection Checklist

Outdoor Outlets and Covers

Check every outdoor receptacle on your property:

• Test all GFCI outlets — Press the TEST button, then RESET. Replace any GFCI that doesn't trip or won't reset. GFCI outlets protect against shock from wet conditions, and New Brunswick's winter is nothing but wet conditions. Replacement cost: $20-$40 per outlet, or $100-$200 if hiring an electrician.
• Inspect weatherproof covers — Every outdoor outlet must have an "in-use" cover (the bubble-type that seals while a cord is plugged in). Old flat flip covers don't meet current CEC requirements and allow moisture intrusion when cords are connected. Replace any cracked, missing, or outdated covers ($5-$15 each).
• Seal gaps around boxes — Use silicone caulk rated for outdoor use around the perimeter of outdoor electrical boxes where they meet the siding. Water that enters these gaps freezes, expands, and damages wiring inside the box. This takes 10 minutes and a $6 tube of caulk.

Outdoor Lighting Fixtures

• Clean lens covers and housings — Remove summer's accumulated insects, dirt, and cobwebs. Bug debris inside a sealed fixture traps moisture and causes corrosion over winter.
• Check all mounting hardware — Verify that wall-mount and post-mount fixtures are securely fastened. Ice loading and wind can tear loose fixtures from walls, leaving exposed wiring. Tighten any loose screws and replace any corroded mounting hardware with stainless steel fasteners.
• Replace burned-out bulbs now — Changing bulbs in January at -25°C on an icy ladder is dangerous. Replace any failing bulbs with LED equivalents — LEDs perform better in cold weather than incandescent or CFL bulbs, and they last 15,000-50,000 hours compared to 1,000-10,000.
• Verify photocells are working — Dusk-to-dawn photocells can fail or become sluggish. With New Brunswick's short winter days (as little as 8.5 hours of daylight in December), your outdoor lights will run 15+ hours per day — a stuck photocell means lights running 24/7 and wasted electricity.

Exterior Wiring and Conduit

• Inspect visible conduit for damage — Look for cracks, loose fittings, and separated joints. Water that enters conduit freezes and can crack PVC or push fittings apart. Seal any gaps with PVC cement (for PVC conduit) or approved weatherproof fittings.
• Check underground cable markers — If you have underground wiring for landscape lighting, post lights, or outbuildings, verify that the cable route is marked. Snowplows, snow blowers, and even heavy foot traffic over frozen ground can damage shallow underground cables. Standard burial depth in New Brunswick is 18 inches for direct-burial cable, but frost penetration reaches 4-5 feet — cables at minimum depth are below the frost line in most of the province but verify this in northern regions.
• Trim branches near overhead service entrance — Ice-laden branches that contact your overhead service drop can pull the weatherhead loose or damage the mast. NB Power is responsible for the lines to your home, but the weatherhead, mast, and meter base are your responsibility. Trim any branches within 3 metres of your service entrance.

Holiday and Seasonal Lighting Prep

• Inspect all extension cords — Use only outdoor-rated extension cords (marked "W" or "W-A" on the jacket) rated for wet locations. Check for cracked insulation, exposed conductors, and damaged plugs. Discard any damaged cords — electrical tape repairs on outdoor cords are a fire and shock hazard in wet winter conditions.
• Calculate your load — A standard 15-amp outdoor circuit safely supports 1,440 watts (80% of the 1,800W circuit capacity, per CEC continuous load rules). Modern LED holiday lights use 5-10 watts per string compared to 40-50 watts for incandescent. You can safely run 100+ strings of LED lights on a single circuit, but only 25-30 incandescent strings.
• Use outdoor-rated timers — Plug-in outdoor timers ($15-$25) save energy and prevent lights from running during daylight. Smart outdoor plugs ($25-$40) offer scheduling plus the convenience of turning lights off from inside on a cold night.
• Keep connections elevated — Where extension cords connect, keep the junction off the ground and preferably under cover. Snow melt pooling around a ground-level cord connection is a GFCI trip waiting to happen.

Winter-Specific Electrical Hazards

Ice dam damage: Ice dams on the roof can force water under shingles and into exterior walls where outdoor fixtures are mounted. If you notice water staining near any exterior electrical fixture after a thaw, have the wiring inside the wall checked by an electrician before the next freeze.

Generator readiness: If you have a portable or standby generator for NB Power outages, fall is the time to test it. Run it under load for 30 minutes, check the oil, verify the transfer switch operates correctly, and ensure you have adequate fuel. NB Power outages from ice storms can last 3-7 days in rural areas — your generator needs to be ready before the first storm.

Heat tape/trace cable: If you use heat tape on pipes, roof edges, or gutters, inspect it before the first freeze. Look for damaged insulation, failed sections (feel for cold spots when powered on), and verify GFCI protection. Heat tape draws significant power — a 100-foot roof heat cable uses 500-800 watts continuously. Ensure the circuit can handle the load alongside other winter demands.

Snow load on outdoor panels and disconnects: If your electrical meter, main disconnect, or generator transfer switch is mounted on an exterior wall that accumulates snow, keep the area cleared. Emergency access to the main disconnect is critical — you need to be able to shut off power quickly in an emergency, and 3 feet of drifted snow blocking the panel isn't safe.

Seasonal Maintenance Schedule

| Month | Task |
|-------|------|
| October | Full outdoor inspection, seal gaps, test GFCIs, replace bulbs, trim branches |
| November | Install holiday lighting, test generator, verify heat tape |
| December-March | Monthly GFCI test, clear snow from panel/meter, check outdoor fixtures after storms |
| April | Post-winter damage assessment, clean fixtures, inspect for ice damage |

When to Call a Professional

Hire a TSANB-licensed electrician if you find:

• Damaged or exposed wiring on any outdoor circuit


• Outdoor outlets that spark, feel warm, or show burn marks


• Conduit that has separated or cracked open exposing wire


• GFCI outlets that won't reset after drying out


• Any outdoor fixture that has water visibly inside the housing

A pre-winter electrical inspection by a licensed New Brunswick electrician costs $150-$300 and typically covers the full exterior of your home. Given that outdoor electrical failures in winter are both dangerous and expensive to repair in freezing conditions, this is a worthwhile annual investment for any Maritime homeowner.

---

Find a Electrical Contractor

New Brunswick Electrical connects you with experienced contractors through the https://newbrunswickconstructionnetwork.com:

• A+ Solar Solutions ✓
• BCB Electric ✓
• Blue Energy Ltd ✓

View all electrical contractors →