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Heavy-Duty 4" Square Steel Box Extensions for Added Wiring Capacity & Secure Installations
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These 4" Square Steel Box Extensions are designed to extend the depth of existing 4" square electrical boxes in wall or ceiling installations. Manufactured from galvanized drawn steel, they provide a strong, fire-rated, and code-compliant solution when additional wiring space is required.
Built-in conduit knockouts allow seamless integration into conduit-based wiring systems, making these extensions ideal for commercial and residential electrical applications.
FEATURES:
Designed to increase the depth and cubic capacity of existing 4-inch square electrical boxes, providing additional space for conductors, splices, and electrical devices.
Manufactured from premium galvanized drawn steel for exceptional strength, corrosion resistance, and long-lasting durability in demanding electrical installations.
Multiple 1/2-inch and 3/4-inch conduit knockouts provide convenient conduit routing and accommodate a variety of wiring configurations.
Engineered to fit standard 4-inch square electrical boxes, creating a secure extension while maintaining a clean, professional installation.
The galvanized steel construction resists rust and corrosion, making these extension rings suitable for long-term residential, commercial, and industrial use.
Designed for fast installation with standard mounting hardware, allowing electricians to expand existing boxes without replacing them.
A square box extension increases the depth and wiring capacity of an existing 4-inch square electrical box, providing additional room for wires, splices, and electrical devices.
It is manufactured from heavy-duty galvanized drawn steel for superior strength, corrosion resistance, and long service life.
Yes. It features multiple 1/2-inch and 3/4-inch conduit knockouts for flexible conduit entry and wiring configurations.
Yes. It is designed to fit standard 4-inch square electrical boxes, providing a secure and precise extension.
It is ideal for residential, commercial, and industrial electrical installations where additional wiring space is needed without replacing the existing electrical box.
