What is the most common cause of house fires related to electricity in New Brunswick?

The leading electrical causes of house fires in New Brunswick are aging wiring with deteriorated connections, overloaded circuits in older homes, and misuse of portable heating equipment — many of these are preventable with proper electrical maintenance.

Top electrical fire causes in NB homes:

1. Aging and deteriorated wiring (most common)
New Brunswick has a significant inventory of homes built in the 1950s-1970s. Over decades, wire insulation degrades, connections loosen, and components wear out. The most dangerous situations:

• Loose connections at outlets, switches, and panels generate heat through electrical arcing. This is especially common with aluminum wiring (1965-1976 homes) and backstab connections


• Knob and tube wiring (pre-1950 homes) that contacts insulation — common when homeowners add blown-in insulation to attics without addressing the old wiring


• Damaged wire insulation in attics exposed to extreme NB temperature swings (hot summers, freezing winters)

2. Overloaded circuits
Older NB homes with 60-100 amp panels and limited circuits can't handle modern electrical demands. When circuits are overloaded:

• Wire insulation heats beyond its rating


• If the breaker/fuse fails to trip (common with Federal Pacific panels), the wire continues to overheat


• Extension cords used as permanent wiring compound the problem — they're not rated for continuous high loads

3. Space heater misuse
Particularly relevant in NB where supplemental heating is common:

• Space heaters placed too close to combustibles (curtains, bedding, furniture)


• Plugged into extension cords or power strips not rated for the load


• Running on circuits shared with other high-draw devices


• Left unattended or used overnight

4. Federal Pacific Stab-Lok panels
These panels, installed in many NB homes during the 1970s-1980s, have breakers with documented failure rates. When a breaker fails to trip during an overcurrent event, the wire overheats with no protection — direct path to fire.

5. DIY electrical work
NB requires all electrical work to be done by licensed electricians, but unlicensed work happens. Common DIY fire starters:

• Oversized fuses (putting a 30A fuse where a 15A was to "stop it from blowing")


• Junction boxes not properly secured or covered


• Wire connections without proper connectors


• Circuits without adequate overcurrent protection

Prevention checklist for NB homeowners:

• [ ] Have a licensed electrician inspect your panel if your home is 30+ years old
• [ ] Replace Federal Pacific or Zinsco panels immediately
• [ ] Address aluminum wiring with COPALUM pigtailing or AlumiConn connectors
• [ ] Install AFCI breakers on bedroom circuits (detects arcing faults before they cause fires)
• [ ] Stop using extension cords as permanent wiring — add circuits instead
• [ ] Never use space heaters on extension cords or power strips
• [ ] Test smoke detectors monthly and replace batteries annually
• [ ] Keep 1 metre clearance around your electrical panel
• [ ] Don't overload outlets — maximum 2 high-draw devices per circuit

When to be concerned:

• Burning or acrid smell from outlets, switches, or panel — call an electrician immediately
• Discoloured or warm outlet covers
• Sparking when plugging in devices
• Breakers that trip and won't reset
• Lights that flicker throughout the house (indicates loose main connections)

If you smell burning from an electrical source and can't identify it, call the fire department first, then an electrician. NB fire departments respond to electrical emergencies and can help identify the source safely.

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