Buying a home is one of the biggest investments you’ll ever make. While most buyers focus on location, price, and layout, it’s equally important to pay attention to the electrical system. Faulty wiring isn’t just a financial headache—it’s also a major safety hazard. Electrical issues are among the leading causes of house fires, so spotting potential problems early can save you from costly repairs and risks down the road.

If you’re planning to purchase a property, here are the wiring issues to watch for when buying a house.

1. Outdated Electrical Panels

Older homes often come with panels that can’t handle today’s electrical demands. Panels rated for less than 100 amps, or outdated brands like Federal Pacific or Zinsco, may pose fire hazards. If the home still uses a fuse box instead of a breaker panel, it’s a red flag that an upgrade is necessary.

Tip: Ask your home inspector to confirm the panel’s age and capacity. Modern homes typically require at least 150–200 amps.

2. Knob-and-Tube Wiring

Homes built before the 1950s may still contain knob-and-tube wiring. While it was innovative at the time, it lacks grounding, can overheat easily, and isn’t designed for modern appliances. Many insurance companies refuse coverage for homes with knob-and-tube systems, making it a deal-breaker for buyers.

3. Aluminum Wiring

In the 1960s and 70s, aluminum wiring was used as a cheaper alternative to copper. Unfortunately, it expands and contracts with heat, loosening connections over time and creating fire risks. Look for signs of aluminum wiring in outlets, switches, or the electrical panel.

4. Overloaded Circuits

If the seller has multiple extension cords, power strips, or unusually warm outlets, it may signal overloaded circuits. This is common in older homes where the electrical system wasn’t designed for modern power needs like HVAC systems, home offices, and smart devices.

Warning signs include:

• Flickering lights

• Frequently tripped breakers

• Burning smells near outlets

5. DIY Electrical Work

Not all homeowners hire licensed electricians. You may come across amateur wiring jobs that don’t meet building codes. Loose wires, open junction boxes, or mismatched connections can all spell trouble.

6. Lack of Ground Fault Circuit Interrupters (GFCIs)

In kitchens, bathrooms, basements, and outdoor areas, GFCIs are essential for safety. These outlets prevent electrocution by shutting off power when moisture is detected. If the home lacks GFCIs in wet areas, you’ll need to budget for an upgrade.

7. Old or Damaged Wiring Insulation

Wiring insulation deteriorates over time, especially in hot attics or damp basements. Brittle, cracked, or chewed wires (a common issue in rodent-prone homes) can lead to shorts and fire hazards.

How to Protect Yourself as a Homebuyer

• Hire a licensed home inspector with electrical expertise.

• Request an electrical inspection if the home is older than 30 years.

• Budget for upgrades if outdated or unsafe wiring is found.

• Negotiate with the seller to cover repair or replacement costs.

When buying a house, never overlook the condition of its wiring. Electrical problems can be dangerous and expensive to fix—but spotting them early can help you make an informed decision and avoid future headaches. Whether it’s outdated panels, aluminum wiring, or overloaded circuits, knowing what to look for ensures your dream home is also a safe one.

Matt Witte strives to be the best realtor in North Andover, MA.

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