Question 1

Is knob and tube wiring dangerous?

Accepted Answer

Knob and tube wiring isn't inherently dangerous when original and unmodified, but it becomes a serious fire hazard when combined with modern insulation or when deteriorated after 80+ years of use.

Knob and tube was the standard electrical system from the 1880s through the 1940s, and it worked safely for decades when properly installed. The system uses separate hot and neutral wires running through ceramic knobs and tubes, relying on air circulation for cooling. However, several factors make it

Question 2

How do I know if my home has a grounding problem?

Accepted Answer

Grounding problems in your home can create serious safety hazards, but there are several warning signs you can watch for as a homeowner. The most common indicators include frequent electrical shocks from appliances, flickering lights when large appliances turn on, and GFCI outlets that trip frequently without an obvious cause.

Physical signs of grounding issues include getting small shocks when touching metal appliances, light switches, or plumbing fixtures. You might notice that your electroni

Question 3

Is it safe to use extension cords for appliances long term?

Accepted Answer

No, extension cords should never be used as permanent wiring solutions for appliances. Extension cords are designed for temporary use only and can create serious fire and electrocution hazards when used long-term.

Why Extension Cords Are Dangerous for Permanent Use

Extension cords lack the safety features of permanent wiring. They're not protected inside walls, making them vulnerable to damage from foot traffic, furniture, and pets. The connections at both ends create resistance points that ge

Question 4

My lights flicker when the furnace kicks on - is this dangerous?

Accepted Answer

Flickering lights when your furnace starts is typically not dangerous, but it indicates your electrical system is being overloaded and needs attention from a licensed electrician.

When your furnace motor starts up, it draws a large surge of power (called "inrush current") that can temporarily drop the voltage in your home's electrical system. This voltage drop causes lights to dim or flicker momentarily. While this won't immediately harm you, it signals that your electrical system may be unders

Question 5

Is it dangerous to overload a circuit?

Accepted Answer

Yes, overloading a circuit is extremely dangerous and can cause fires, damage to your electrical system, and potentially electrocution. Circuit overloads are one of the leading causes of electrical fires in Canadian homes, making this a serious safety concern that every homeowner should understand.

When you draw more electrical current through a circuit than it's designed to handle, several dangerous things happen. The wiring heats up beyond safe levels, which can melt wire insulation and creat

Electrical Safety

Is knob and tube wiring dangerous?

How do I know if my home has a grounding problem?

Is it safe to use extension cords for appliances long term?

My lights flicker when the furnace kicks on - is this dangerous?

Is it dangerous to overload a circuit?