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Topic: Anyone recognize this old QO Panel? Looking for interlock

User: B677, Location: Florida

Asked on: Thursday, May 8, 2025 at 10:27 am EDT
Answered on: Thursday, May 8, 2025 at 10:28 am EDT

Question: Don't have access to inside of panel at this time but wondering of there is an interlock kit for it

Okay, I understand. You're trying to determine if an interlock kit exists for your electrical panel without being able to physically access it to get the make and model information. That makes it challenging, but not impossible.Here's how you can try to figure it out remotely

1. Gather Information from Outside the Panel:
Service Entrance Amperage

Look for the main breaker rating on the

outside
of the panel. It's usually clearly labeled (e.g., 100A, 200A). This is crucial.
Panel Style/Type

Take a photo of the front of the panel. Note its overall shape, size, and any distinct features. Also, note if the breakers are arranged in a single row, or two rows (staggered), etc.

Any Visible Labeling (Even Partial)

Look for
anything printed on the outside of the panel door or cabinet. Sometimes you can find a manufacturer name or a partial model number, even if it's faded. This is incredibly helpful.

The Age of the House/Building

This can give you a clue as to when the panel might have been installed. Older houses often have older, less common panel brands.

Location

Some brands are very popular in some parts of the world and not available at all in others.

2. Online Research



Google Image Search

Use keywords like "electrical panel [color] [shape] [breaker layout]" for example: "electrical panel grey square staggered breakers". Browse the images. You might recognize your panel.

Online Electrical Supply Retailers

Websites like Home Depot, Lowe's, or specialized electrical supply houses often have search filters that allow you to browse by amperage and sometimes even by panel style.

3. Consult an Electrician (Best Option)

The safest and most reliable way to determine the correct interlock kit is to

hire a qualified electrician
. Even without seeing the inside of the panel initially, they might recognize the panel style from the outside and make an educated guess as to the make and model. They can then confirm it with a quick inspection later. An electrician can also assess your generator and power needs to ensure the interlock kit and generator setup are appropriate and safe for your home. Important

An electrician will be required to install the interlock kit properly and safely.

4. Why Knowing the Make and Model is Critical



Compatibility

Interlock kits are designed to fit specific panel makes and models. Using the wrong kit can be dangerous.


Safety

Interlock kits prevent backfeeding electricity onto the grid, which can electrocute utility workers or damage equipment.

Without being able to see inside the panel, providing a definitive answer is impossible.
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