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Knob & Tube Wiring Services

Home
Electrical
Knob & Tube Wiring

Knob & Tube Wiring is an outdated electrical system commonly found in homes built before 1950, and it poses serious safety and insurance challenges if not replaced. At SumZero, we provide fast, code-compliant Knob & Tube Wiring replacement services across Massachusetts—giving you a safer, more energy-efficient home with lasting peace of mind.

Vintage ceramic electrical insulators on wooden surface with black wire

Knob and Tube Wiring Replacement: Why Now Is the Right Time

If your home still has knob and tube wiring, it’s more than just outdated—it may be putting your safety, insurance eligibility, and energy efficiency at risk. Replacing this outdated system starts with one smart decision: acting before a small issue becomes a costly emergency.

Why Outdated Electrical Systems Can Be Hazardous

Many older homes still contain wiring that's no longer up to today’s electrical demand or safety standards. Here’s why that's a big concern:

  • Wires lack grounding, increasing fire and shock risk
  • The insulation around wires breaks down over time
  • Adding modern appliances can overload the system
"Many homeowners don’t realize that insurance companies may deny or cancel coverage if knob and tube wiring remains in place—regardless of its condition."

Benefits of a Timely Home Wiring Upgrade

Transitioning to modern wiring improves your home’s safety and performance while also enhancing property value. You’ll also enjoy:

  • Lower risk of electrical fires or short circuits
  • Modernized system ready to handle today’s devices
  • Greater peace of mind knowing your home is up to code

Bold move, smarter home—upgrading isn’t just about compliance, it’s about protecting what matters most.

How to Upgrade Knob and Tube Wiring in Your Home

Taking on a knob and tube rewiring project can feel overwhelming, but with the right professional help, it's a smooth and worthwhile investment into your home's long-term stability.

Avoiding Common Old Home Electrical Issues

Older homes often come with surprise electrical challenges. Here’s how to ensure a smart, safe upgrade:

  1. Start with a professional inspection
  2. Create a phased-out plan—prioritize key rooms first
  3. Ensure all work meets Massachusetts electrical codes
  4. Check eligibility for programs from trusted sources like Mass Save®

What a Full Home Wiring Upgrade Includes

  • Removal of existing knob and tube elements
  • Replacement with modern, grounded wires
  • Upgraded outlets and safer breaker panels

And the bonus? Homes with modern wiring are often more energy-efficient—potentially lowering your utility bills in the long run.

Ready to replace outdated electrical systems and put safety first? Contact us for a consultation and take control of your home’s future—safely, swiftly, and with confidence.

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What Local Homeowners Are Saying

See how SumZero has helped local homeowners stay comfortable year-round with energy-efficient heat pump solutions.

Over-the-top outstanding communication with company throughout process. In this area, never seen anything like it from contractors. They mostly setup masssaves heat loan for me: as much as they can, and were patient, attentive as I waited on that process. They even encouraged it (if that’s what I wanted.) NO other company among 4 competitors did that. Do your homework, see pictures, you’ll see this co. does neat and tidy work, and their technical expertise seems to match that. I’m actually proud that we found and picked them, for my part. In the end, still work done by contractors, so important to know what people typically find wrong with type of work you’re having done, and keep an eye out for those things. The few small details I pointed out, sum zero guys were all over it, no pushback. And…they are ahead of the game in that area too: they have experience and have clearly learned from it. The could explain why they recommend what they recommend based on customer feedback. They are very cutting edge in AC tech., materials, smart home tech., communication with customer—customer service in general. Everyone was on the same page with that. As of May 2022, this is a company that seems to be in a good place doing good business. I prioritize capability over “nice gals/guys,” but worth mentioning that they have people skills. Especially young guy that assessed and did sales end—really bright. So, this is genuine, I feel like they went far enough to be worth my time writing a review. Recommended.
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DJ Worcester
Paul and his crew did an amazing job on our heating system. When it was not exactly what we had agreed upon after installation, he had his team return and make the adjustments. The next day. Fast and at no charge. He provided quick, friendly and helpful service in an industry not know for timely quality. Thanks to Paul and the guys for a job well done.
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Tom M.
From start to finish, Sum Zero did a great job with our A/C service. Scheduling was easy and quick. Communication was excellent. Our tech, Nilson, was professional and thorough on a stifling hot, humid day. His attitude and demeanor were respectful. And he did a great job educating me about our system and how to keep it well maintained. Highly recommend!
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Shannon Shertzer

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