Category: Uncategorized

May 19, 2026

What is Knob and Tube Wiring?

“Knob and tube wiring” (also known as K&T wiring) is a wiring method that was heavily used in residential buildings from 1880 to 1930. The method used single copper wires and ran them through walls and ceilings, using a protective porcelain insulation tube to pass through joist and stud holes while being secured in long runs with porcelain insulators. Eventually, knob and tube wiring became obsolete as its pricing became too high when compared to all-encompassing cables. In this blog we are going to look at the dangers of keeping knob and tube wiring in a home, and what can be done to eliminate such lingering hazardous practices.

Is knob and tube wiring dangerous?

Knob and tube wiring can result in a number of hazards and dangers, especially as time has passed.

• Due to how long ago knob and tube wiring was considered an industry standard, insulation on the wiring has typically become brittle, broken, cracked, or gone missing entirely.
• New installations in housing may have been done through mixing old and new wire, aka a very hazardous method that could result in a fire. 
• Knob and tube wiring lacks a ground, resulting in groundless and/or misleading electrical outlets.
• K&T wiring is often modified by do-it-yourself projects, or unqualified technicians. This can result in poor connections.
• K&T is designed to dissipate heat by being in free air. This poses a problem as K&T is often overlooked, resulting in it being covered in insulation over the years, which further raises the risk of fire for homes that still run it.

How can I identify knob and tube wiring in my home?

While it may help, you don’t have to be an electrician to identify knob and tube wiring. Let’s look at the methods you can use to identify knob and tube wiring in your home.

Key elements of K&T include:

• Non grounded outlets: If an outlet in your home consists only of two insert prongs, then that means it is lacking grounding, and most likely using knob and tube wiring.
• The wire itself: If you have an unfinished basement, or are able to access your attic or crawlspace, take a moment to see if there are any visible single black strand wires running through with porcelain insulators in the area.
• Home history: If you live in a house built between 1880 and 1930, find out if it has any history of renovations. While a history of renovations doesn’t guarantee the removal of K&T, a lack of renovations heavily guarantees there is still K&T wiring.
• Insurance: Insurance companies charge an extra premium for houses with knob and tube wiring. 

Together, these methods can be used to identify knob and tube wiring being used in your home.

How do I fix knob and tube wiring?

“Fixing” of knob and tube wiring requires a complete removal of the outdated practice, which can be a lengthy and expensive process. Luckily, our family at Birnie HomeSAFE includes highly trained electrical specialists who are dedicated to rewiring your home, while trying to minimize as much damage as possible. In the event of necessary damage caused during rewiring and removal of K&T, we partner with patching and painting companies to make sure that your home returns how it looked before, as if no work was done at all. 

Book a HomeSAFE Electrical Risk Assessment

Still unsure of K&T in your home, or looking for a quote? Contact Brinie HomeSAFE for our HomeSAFE Electrical Risk Assessment. The risks of keeping knob and tube wiring in your home are no joke, get a quote today and ensure the safety of you and your loved ones.

The ERA system prevents fires by giving licensed electricians the training, tools, technology, and support needed to complete a thorough Electrical Risk Assessment.

👉 Learn more about a HomeSAFE Electrical Risk Assessment at Birnie HomeSAFE:

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“Knob and tube 1930” by Laura Scudder is licensed under CC BY-SA 3.0.

April 14, 2026

Aluminum wiring in residential buildings was once very common, and is still present in many homes built between 1960 and 1980 across Canada. While it was once used as a lower-cost alternative to copper, it is now widely associated with increased electrical fire risk when not properly maintained. If your home contains aluminum wiring, an electrical risk assessment is the most effective way to identify hazards and reduce long-term safety risks.

Is Aluminum Wiring Safe?

Aluminum wiring can be safe when it is properly installed and regularly inspected. The wiring itself is not always the problem. However, research has shown that homes with aluminum wiring may have up to 55 times higher risk of reaching fire conditions compared to homes wired with copper, particularly when connections are not maintained correctly. The highest risk is not inside the walls, but at the termination points where wiring connects to outlets, switches, and panels.

Why Aluminum Wiring Creates Fire Risk

Most aluminum wiring issues develop at connection points over time. These risks are often hidden until an inspection is completed.

Key contributing factors include:

• Oxidation: Aluminum naturally forms an oxide layer that increases resistance.
• Thermal movement: Expansion and contraction from temperature changes can loosen connections.
• Incompatible devices: Older outlets and switches may not be rated for aluminum wiring.
• Loose terminations: Increased resistance leads to overheating and electrical arcing.

Together, these factors can increase heat buildup and create fire hazards if left unaddressed.

Aluminum Wiring vs Copper Wiring

Copper wiring is more stable, durable, and less prone to connection issues, which is why it is the standard in modern construction. However, aluminum wiring does not always require full replacement. In many cases, the risk can be managed through proper inspection and maintenance. The greatest danger occurs when aluminum is improperly connected to copper wiring without approved connectors or methods.

Do You Need to Replace Aluminum Wiring?

Full aluminum wiring replacement is not always required. In many homes, the wiring itself remains functional and safe when properly maintained. The real priority is ensuring all connection points are secure, compatible, and inspected regularly. A HomeSAFE Electrical Risk Assessment helps determine whether your home requires repairs, upgrades, or simple maintenance.

Electrical Risk Assessment: The Recommended Solution

Instead of full rewiring, the safest and most practical solution is a HomeSAFE Electrical Risk Assessment.

A professional assessment focuses on identifying and correcting high-risk areas, including:

• Loose or overheating connections
• Improper aluminum terminations
• Signs of oxidation at outlets and switches
• Unsafe aluminum to copper connections
• Electrical panel and circuit risks

This process helps identify hazards early and reduces the risk of electrical fire without unnecessary full system replacement.

👉 Click Here to learn more about a HomeSAFE Electrical Risk Assessment at Birnie HomeSAFE:

Book a HomeSAFE Electrical Risk Assessment

If your home was built between 1960 and 1980, it is strongly recommended to have your electrical system inspected. A HomeSAFE Electrical Risk Assessment provides a clear understanding of your home’s electrical safety and identifies potential fire risks before they become serious issues. Visit Birnie HomeSAFE to request an assessment or get a professional evaluation of your electrical system.

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April 15, 2021

The National Fire Protection Association (NFPA) says firefighters respond to an average of 3,810 fires in college dorms every year. Careless smoking, unattended candles and cooking and the improper use of extension cords and power outlets are the most common culprits.

Electrical safety should be top of mind especially for those living in older dorms or student residences. In a previous post, we interviewed Hamilton resident, Olivia Clarke, who left her student house after discovering unsafe electrical issues. Clarke hopes her story will inspire other students to do their research before moving into an older residence.

Electrical fires are preventable but it’s up to students to make the right decisions and know what to do in the event of an electrical hazard. Here are some important recommendations to remember:

1. Do not reset a breaker more than once: If the breaker keeps tripping there’s a problem; contact your landlord or your residence director right away.

2. Avoid plugging in too many devices:  Plugging in too many devices can overload your circuits. The Electrical Safety Authority (ESA) says you should only use 80 percent of your circuits amperage to be safe. So if your circuit is 15 amps, you should only use 12 amps.

 

3. Avoid using large draw appliances like portable heaters or air conditioners unless on a dedicated circuit:  These appliances have a heavy load and will likely take up that 12 amp threshold. This type of device must be plugged into a dedicated circuit. 

 

4. Contact a licensed electrical contractor: If you feel like there is imminent danger and your landlord or residence director has not been able to rectify the issue, contact the fire department right away. You should also reach out to a licensed electrical contractor, like HOME SAFE, to perform any necessary inspections and repairs. 

HOME SAFE is a Mississauga-based licensed electrical contractor that services homes and student residences all across the GTA. The electrical contractor encourages students or parents with questions or concerns to reach out.

Our 24/7 emergency service makes it easy for residences to contact us at any time.

Students, we encourage you to read and memorize these other important safety tips:

1. Become familiar with your new home or dorm; make a fire escape plan and practice it regularly – make sure you have two ways of getting out of your home

2. Check smoke alarms for expiry; test every month, change batteries twice a year and replace every 10 years (or as per manufacturers request). Don’t assume the alarm is working just because the light is on.

3. A functioning CO alarm must be installed outside sleeping quarters

4. Install a functioning fire extinguisher on an exit path that is easily accessible – not in a cupboard or under the sink

5. Never leave cooking unattended, stay in the kitchen if you’re cooking

6. If you smoke, smoke outside and use deep, sturdy ashtrays to properly discard cigarettes. Never flick cigarette butts off of balconies

7. If you’re lighting candles make sure they are away from flammable items like curtains, couches, pillows or clothing; always blow them out if you’re leaving the room. Opt for battery-powered candles instead – they are safer.

8. For those living in upper floors, install a collapsing escape ladder from the window

9. For those living in basements, make sure there is an exit direct to outside

10. Do not overload extension cords, power strips or outlets

11. Do not connect multiple extension cords together

12. Extension cords should never be used on a permanent basis

13. Do not place cords under doors or carpets, and do not pinch them with   furniture

14. Use light bulbs with correct wattage for lamps

15. Never remove the ground pin (the third prong) to make a three-prong plug fit a two-prong outlet

16. Check that all electrical items, including extension cords, are certified by a nationally recognized independent testing laboratory, such as Underwriters Laboratories (UL), Intertek (ETL), or Canadian Standards Association (CSA)

17. Irons, hairdryers, curling irons and straighteners should never be left unattended, and should be unplugged when not in use

Peace of mind for your family

It’s like an MRI for your home

Locking the doors to your home is no guarantee of safety from dangers that may be hiding within its walls.

This may sound like a horror movie trailer but it’s really a cautionary tale about electrical safety and how to prevent preventable, potentially catastrophic, residential fires. Statistics show that faulty electrical wiring is a major cause of house fires.

Tim Birnie, president of Birnie Electric Ltd., is committed to revealing those dangers and making homes safe through his company’s Home Safe program. Tim’s father Peter Birnie established
the company more than 53 years ago. The expansion into the residential market was sparked by a desire to eliminate fire risks in homes.

Since initiating the Home Safe service 10 years ago, Tim says; “It’s been my passion. I find it so satisfying that we can give people peace-of-mind and eliminate these dangers.”

Tim and his team have developed an innovative inspection that utilizes state-of-the-art and non-invasive equipment like circuit analyzers, infrared thermography and other diagnostic tools to find electrical hazards that could cause a fire.

Warning signs that an assessment is urgently needed include outlets or switches that don’t work, are warm to the touch or emit a burning smell. You’ve also got electrical problems if breakers trip or fuses blow, lights dim or bulbs burn out. Homes with aluminum or knob-and-tube wiring should also be inspected for potential risks.

The Birnie Home Safe Program has three steps starting with a no-cost home assessment. An expert will assess the home, listen to the homeowner’s concerns and point out potential issues. The next step is the electrical risk assessment that involves a full day of non-invasive testing by a fully licensed and highly trained electrician to uncover hazards. Homeowners receive a report that includes recommended electrical updates. The third step is to repair the problems identified and make the home’s electrical system safe. Home Safe also offers standby emergency home generators as a Generac dealer and provides innovative smart devices and LED lighting solutions.

Tim and his Home Safe team have presented numerous seminars that feature special guests including fire department representatives and other home safety experts. In line with the company’s rigorous COVID-19 safety protocols, the free seminars are now offered online. Pre-register at the Home Safe website: ismyhomesafe.ca for the next seminar on Wednesday, April 14 at 7:00pm.