Marlborough Electricians

Top Quality Electrical Services in Marlborough, MA

Have you noticed a buzzing sound coming from an appliance? Experienced flickering lights or electrical outlets that are warm to the touch? These are subtle warning signs that it’s time to call an electrician. Cotti-Johnson has been providing residential and commercial electrical services in Marlborough since 1944, from running new electrical writing in your space to upgrading existing electrical panels. If you need professional electrical services, we’re here to help. 

Our electrical services include: 

• Rewiring 
• General inspections 
• Electrical panel upgrades 
• Repairs, installations, and upgrades

To schedule an appointment with a licensed Marlborough electrician, call (774) 768-5154 today!

We Specialize in Knob and Tube Wiring

Knob and tube wiring is an early electrical wiring system that was commonly used in North America from the 1880s to the 1940s. It consists of individual insulated copper conductors that are run through ceramic tubes and supported by porcelain knobs. The conductors are typically spaced apart to prevent them from coming into contact with each other and causing a short circuit. Knob and tube wiring can be found in older homes throughout the Marlborough area.

Here are a few key characteristics of knob and tube wiring:

• Separate wiring: Knob and tube wiring keeps the hot (live) and neutral wires separate, running them independently of each other. This is in contrast to modern electrical systems where the hot and neutral wires are bundled together in cables.
• Lack of grounding: Knob and tube wiring does not include a grounding conductor, which is a safety feature found in modern electrical systems. This means that appliances and electrical devices connected to knob and tube wiring may not have a reliable path to ground, increasing the risk of electrical shock or fire.
• Insulation: The insulation used in knob and tube wiring is typically made of rubber or cloth. Over time, this insulation can deteriorate, become brittle, or be damaged by rodents or other factors. This can expose live wires and create hazardous conditions.

Given these characteristics, it is important to hire an electrician who specializes in knob and tube wiring when dealing with this type of system. Here's why:

• Expertise: Our Marlborough electricians specialize in knob and tube wiring, which means we have the knowledge and experience to understand its unique characteristics and potential issues. We are familiar with the specific techniques, materials, and safety considerations associated with this older wiring system.
• Code compliance: Modern electrical codes have evolved significantly since the era of knob and tube wiring. An electrician from Cotti-Johnson can assess whether the existing knob and tube wiring meets current safety standards and code requirements. They can advise on necessary upgrades or replacements to ensure compliance and improve safety.
• Safety precautions: Working with knob and tube wiring requires extra care due to its age, lack of grounding, and potential for deterioration. When you call Cotti-Johnson, one of our qualified electricians will take appropriate precautions to minimize the risk of electrical shock, fire, or damage to the system during any repairs, modifications, or upgrades.
• Preservation and integration: In some cases, homeowners may choose to preserve the original knob and tube wiring for historical or aesthetic reasons. An electrician specializing in this type of wiring can work to integrate modern electrical components and devices while preserving the integrity of the existing system.