Safety & diagnosis — sizing guideline

Arc Fault Risk Checker

A rough read on your arc fault risk based on your home's age and wiring — arc faults are a leading cause of electrical fires, and older homes without AFCI protection carry more of this risk.

1. Your Home

Approximate home age

Do you have AFCI breakers?

Home has aluminum branch wiring (common 1965–1975)

Home has any knob-and-tube wiring remaining

You've noticed flickering, buzzing, or warm outlets/switches

2. Risk Read

Pattern-based read

Result:

Answer the questions to see your risk read.

What arc faults actually are

An arc fault is unintended electrical arcing — sparking — from a loose connection, damaged insulation, or a nicked wire (like from a nail or staple).
Arcing generates intense localized heat, which is why it's a leading cause of electrical fires, particularly in older wiring.
AFCI breakers are specifically designed to detect the electrical signature of arcing and trip before it becomes a fire — standard breakers don't catch this.

Symptom → likely cause → action

Electrical symptoms are data. Read the pattern before touching anything.

Symptom	Most likely cause	What to do
Buzzing outlet or switch	Loose terminal arcing	Turn off circuit, inspect/replace device
Scorch marks / browning	Arcing has already occurred	Stop using; electrician before reuse
Warm faceplate or cord	Resistance heating at a bad joint	Unplug, investigate the plug and device
Breaker trips with a snap + flash at outlet	Line-to-line or line-to-ground arc	Do not reset — diagnose first
AFCI breaker trips repeatedly	Genuine arcing signature (or nuisance)	Document what's running; electrician to verify
Burning smell, no visible cause	Overheating insulation in wall	Emergency — shut off main, call for help

When in doubt: turn the circuit off at the panel and ask a licensed electrician. Burning smells and hot panels are emergencies.

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The Riley Group Electrical provides licensed, insured electrical services across Durham Region and the GTA. For panel upgrades, EV chargers, renovations, or troubleshooting, reach out today.

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