Electrical Enclosures with Knockouts

Save Time in the Field with Electrical Enclosure with Knockouts

Whether you are wiring a junction box or assembling a control panel, every cable and conduit entry takes time. Electrical enclosures with factory-designed knockouts simplify installation by providing predetermined entry locations that can be opened without extensive drilling or machining.

What Are Knockouts?

Knockouts are pre-scored sections molded into an enclosure that can be removed to create openings for conduit, cable glands, and other cable-management components.

For many applications, a knockout can be removed by placing a flat-blade screwdriver in the molded notch and tapping it carefully with a hammer until the knockout separates. Always follow the manufacturer’s instructions and use the proper tools for the enclosure and knockout design.

Faster, Cleaner Cable Management

Factory knockouts make it easier to plan and organize cable entry points. Installers can route power, control, communication, and sensor cables through designated openings while maintaining a clean and accessible internal layout.

Properly positioned cable entries can also help:

• Separate power and signal wiring

• Reduce cable congestion

• Improve bend radius and strain relief

• Simplify future maintenance

• Create a cleaner finished installation

Maintaining the Enclosure Rating

Opening a knockout does not automatically preserve the enclosure’s NEMA or IP rating. Each opening must be fitted with a properly sized cable gland, conduit fitting, plug, or other entry device rated for the required environment.

Using appropriately rated fittings and installing them correctly helps maintain protection against dust, moisture, washdown, and other environmental conditions. Unused openings should also be sealed with properly rated closure plugs.

The completed installation is only as well protected as its weakest entry point, so cable-management components must be selected to match the enclosure and application requirements.

Benefits of Knockout Enclosures

Factory knockouts can provide:

• Faster installation

• Reduced labor and machining

• Consistent cable-entry placement

• Cleaner cable management

• Easier conduit and gland installation

• Reduced risk of damaging the enclosure

• A professional finished appearance

Fibox Enclosures with Knockouts

Fibox offers several enclosure families with factory knockouts to simplify field installation, including:

• Select ARCA-JIC models

• MNX Series

• TEMPO Series

• CARDMASTER Series

These enclosure options provide installers with flexibility for cable entry and cable management while supporting demanding indoor and outdoor applications.

Choose the Right Components

When selecting an enclosure with knockouts, consider the required NEMA or IP rating, cable sizes, conduit layout, environmental conditions, and available internal space.

Pairing factory knockouts with properly rated cable glands and fittings can reduce installation time, improve cable organization, and help preserve the environmental protection required for the completed control panel.