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The Interlock Kit: The Affordable, Reliable Alternative to Manual Transfer Switches

Without an expensive transfer switch, you can’t safely plug a generator into your home’s electrical panel. So when the power goes out, your household systems and devices won’t get generator power through your home’s electrical system. That almost defeats the purpose of having a generator.

Instead, you’ll need extension cords to connect your household devices to your generator; running these cords through your home creates the hazards of tripping and falling, and even causing a fire. Other machines, such as your furnace or water heater, can’t be connected by cord; these devices simply won’t work until power is restored.

Thankfully, there’s a solution - a way to connect your generator to your panel without a transfer switch: The Interlock Kit. The Interlock Kit is a less expensive alternative to transfer switches and generator sub-panels. An electrician can easily mount the Kit to your existing electrical panel. Once the Kit is installed, you’ll be able to safely and conveniently power household systems and devices through your electrical system.

The Interlock Kit is simple and ingenious; it provides a mechanical Interlock, which acts as a manual transfer switch so that the utility and generator breakers cannot be turned on at the same time. The Kit isolates the two systems so that power from the generator will never back feed into utility lines, and vice-versa. That’s safer for your generator, your electrical system – and utility workers who could be shocked while repairing a nearby line.

We offer Kits to replace manual transfer switches for most brands of electrical panels including:

  • Siemens
  • ITE
  • Murray
  • Westinghouse
  • Thomas & Betts
  • Cutler Hammer
  • Challenger
  • Square D
  • Bryant
  • Crouse Hinds
  • General Electric (GE)
  • Feed Thru Panels

You can trust the quality, safety, and effectiveness of our Interlock Kits. Our Kits meet the strict requirements of the National Electrical Code (NEC) and the National Fire Protection Code; they’re also tested and certified by MET Laboratories – a leading independent electrical testing and certification lab. Better yet: Our kits are made in the USA out of high-quality stainless steel; they won’t break or bend, and they will last for years.

If you want to get better use out of your generator - for less than the cost to purchase and install a transfer switch - contact us about our Interlock Kits. Call 804.726.2448 to place an order or learn more!

How Interlock Kit Works

Advantages of the Interlock Kit:

  • Faster and easier to install than transfer switches or generator panels; that means less cost to consumers and higher margins for contractors
  • Mounts to the existing panel, so no additional wall space is required
  • Safely feeds the existing electrical panel, permitting convenient use of all original circuits, without need for extensive rewiring
  • Meets all NEC requirements for optional standby systems (Article 702)