Custom Round Junction Box Manufacturer in China

We offer a diverse selection of round junction boxes, providing a compact and reliable solution for various electrical wiring needs. Ideal for light fixtures and smaller wiring connections, our round boxes ensure secure and protected terminations. Available in metal and non-metallic options with various depths and knockout configurations, our round junction boxes provide a cost-effective and code-compliant solution for your residential and commercial projects. Explore our range for your specific requirements.

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Linkwell Electronics - Your Trusted Round Junction Box Manufacturer from China

While our primary operations and shipping originate from Riverside, California, Linkwell Electronics in China is a trusted manufacturer of high-quality round junction boxes. We specialize in producing reliable and compact round enclosures suitable for various lighting and wiring applications. Partner with us for cost-effective round junction box solutions tailored to your project needs, backed by our manufacturing expertise. Contact us for dependable wiring components.

Various Round Junction Box

round ceiling junction box

round ceiling junction box

We offer a variety of round ceiling junction boxes specifically designed for securely mounting light fixtures and ceiling fans. Our selection includes both metallic and non-metallic options to suit different installation requirements and building codes. These boxes come in various depths and cubic capacities to accommodate different wiring needs and fixture weights. Ensure safe and reliable ceiling installations with our durable and code-compliant round junction box solutions.

weatherproof round junction box

weatherproof round junction box

We offer weatherproof round electrical junction boxspecifically designed to protect your outdoor electrical connections from moisture, dust, and other environmental elements. Constructed from durable materials and featuring watertight gaskets and covers, these boxes ensure the longevity and safety of your wiring in exposed locations. Available in various sizes and with multiple knockout configurations, our weatherproof round junction boxes provide a reliable solution for outdoor lighting, receptacles, and other electrical installations, maintaining code compliance and system integrity.

round exterior junction box

round exterior junction box

We offer a selection of robust exterior round junction box specifically designed to withstand outdoor elements. Constructed from durable, weather-resistant materials like powder-coated metal or UV-stabilized plastics, these enclosures provide reliable protection for your outdoor electrical connections. Featuring watertight seals, corrosion-resistant hardware, and various knockout configurations, our round exterior junction boxes ensure a safe and code-compliant installation for lighting fixtures, receptacles, and other outdoor electrical devices. Explore our range for a dependable outdoor wiring solution.

waterproof round junction box

waterproof round junction box

We offer waterproof round junction boxes designed to protect your electrical connections in damp or wet environments. Constructed from durable, non-corrosive materials, these enclosures feature watertight seals and covers to prevent water ingress, ensuring the safety and longevity of your wiring. Available in various sizes and with different knockout configurations, our waterproof round junction boxes are ideal for outdoor lighting, marine applications, and other moisture-prone settings. Choose reliability and protection for your connections with our waterproof solutions.

black round junction box

black round junction box

We offer a range of black round junction boxes, providing a discreet and durable solution for your electrical wiring needs. Ideal for seamlessly blending with dark-colored fixtures or surfaces, these boxes offer secure enclosures for connections. Available in various materials, including robust metal and corrosion-resistant plastic, and featuring multiple knockout options, our black round junction boxes ensure both functionality and aesthetic appeal for your residential or commercial projects. Explore our selection to find the perfect match for your design.

deep round junction box

deep round junction box

We offer deep round junction boxes, providing extra wiring capacity and installation flexibility for your electrical projects. These enclosures are ideal for situations requiring more internal space for complex wiring or when accommodating larger wire connectors. Available in both metallic and non-metallic options, our deep round junction boxes come with various knockout configurations to suit diverse conduit and cable entry needs. Choose our deep round boxes for reliable performance in residential, commercial, and industrial applications, ensuring ample space and secure connections.

aluminum round junction box

aluminum round junction box

We offer a premium selection of aluminum round junction boxes, providing a lightweight yet durable and corrosion-resistant solution for your electrical installations. Ideal for both indoor and outdoor applications, these boxes offer excellent protection for wiring connections, particularly in environments where weight is a concern or corrosion resistance is crucial. Available in various sizes and knockout configurations, our aluminum round junction boxes ensure reliable performance and easy installation for light fixtures and other electrical devices. Explore our range for a robust and lasting solution.

shallow round junction box

shallow round junction box

We offer a range of shallow round junction boxes, designed for installations with limited ceiling or wall cavity depth. These compact enclosures provide a secure and code-compliant solution for mounting lightweight light fixtures or making essential wiring connections where space is at a premium. Available in both metallic and non-metallic materials, our shallow round boxes come with various knockout configurations to accommodate your specific wiring needs, ensuring a streamlined and efficient installation even in tight spaces. Explore our shallow options for your low-profile requirements.

pvc round junction box

PVC round junction box

We offer a comprehensive selection of round PVC junction boxes, providing a lightweight, corrosion-resistant, and cost-effective solution for your electrical wiring needs. Ideal for lighting fixtures and smaller wiring terminations, our round PVC boxes ensure secure and protected connections in damp or corrosive environments. Available in various sizes and depths, with multiple knockout options, our round PVC junction boxes provide a reliable and code-compliant solution for residential and commercial projects. Explore our range to find the perfect fit for your application.

old work round junction box

old work round junction box

While primarily known for our standard round junction boxes, we also offer specialized “old work” round junction boxes. These are specifically designed for installations in existing walls or ceilings where access from behind is limited. Featuring specialized mounting mechanisms like swing-out clamps, they securely fasten to drywall or plasterboard without requiring access to studs or joists. Ideal for adding or replacing light fixtures or devices during renovations, our old work round boxes provide a convenient and reliable solution for retrofit projects. Explore our range for your specific remodel needs.

Various Round Junction Box

3 inch round junction box

3 inch round junction box

We offer a selection of 3-inch round junction boxes, providing a compact and practical solution for specific electrical wiring applications, particularly for mounting smaller light fixtures or managing limited wire connections. Available in both durable metal and lightweight, corrosion-resistant PVC options, our 3-inch round boxes come with various knockout configurations to accommodate your wiring needs. Their size makes them ideal for situations where space is a premium, ensuring secure and code-compliant connections. Explore our range to find the perfect fit for your project.

4 inch round junction box

4 inch round junction box

We offer a versatile range of 4-inch round junction boxes, providing a compact and dependable solution for safely housing electrical connections, particularly for ceiling and wall-mounted light fixtures. Available in both durable metal and lightweight, corrosion-resistant PVC options, our 4-inch round boxes come in various depths and knockout configurations to suit diverse wiring needs. Ensure a secure and code-compliant installation for your residential or commercial lighting projects with our reliable 4-inch round junction box selection.

5 inch round junction box

5 inch round junction box

We offer a spacious 5-inch round junction box, providing ample room for wiring connections and mounting light fixtures or other round electrical devices. Constructed from durable materials, our 5-inch round boxes ensure secure and protected terminations. Available in various depths and knockout configurations, they offer a reliable and code-compliant solution for residential and commercial lighting installations requiring more internal space than standard sizes. Explore our selection for your specific needs.

Why Choose Our Round Junction Box

Depth and Capacity Adjustments

\We understand that wiring needs vary significantly. Therefore, we offer round junction boxes in a range of depths, allowing you to select the internal volume necessary to accommodate the specific number and size of wire connections for your project. Furthermore, we can create custom depths to meet unique spatial constraints or higher wiring capacity requirements, ensuring a neat and code-compliant installation without overcrowding the enclosure.

Custom Knockout Configurations

To facilitate efficient wiring layouts, we provide the flexibility to customize the number, size, and location of knockouts on our round junction boxes. Whether you need specific conduit entry points or openings for cable clamps in particular positions, we can tailor the knockout configuration to match your exact specifications. This customization streamlines the installation process and ensures a secure and organized pathway for all incoming and outgoing wires.

Specialized Mounting Options

Recognizing that round junction boxes are used in diverse mounting scenarios, we offer a variety of customizable mounting features. This includes options for direct stud mounting with specific screw hole patterns, adjustable brackets for ceiling joist installations, or integrated mounting solutions for unique surfaces. We can also incorporate features for specific fixture hanging mechanisms, ensuring a secure and aesthetically pleasing installation for any lighting design.

Material and Finish Variations

While our standard round junction boxes are constructed from durable materials, we can also offer variations in the type of metal or plastic used to suit specific environmental conditions or aesthetic preferences. Additionally, we provide a range of finishes, including powder coating in custom colors, to enhance corrosion resistance or match the surrounding décor. This customization ensures both long-term durability and seamless integration into your project’s design.

what are benefits of round junction boxes?

Round junction boxes offer distinct advantages in specific electrical applications, particularly for lighting fixtures and situations where a compact, unobtrusive design is preferred. Their circular shape and various mounting options make them a versatile choice for both new installations and replacements. Understanding these benefits helps in selecting the appropriate box for your wiring needs.

Ideal for Light Fixture Mounting

Round junction boxes are specifically designed to directly accommodate the circular canopies of many light fixtures, providing a seamless and aesthetically pleasing installation. Their shape eliminates the need for adapter plates in many lighting applications, simplifying the mounting process and ensuring a secure and stable attachment for ceiling or wall-mounted lights.

Compact and Space-Saving Design

Their circular form factor often results in a more compact footprint compared to square or rectangular boxes, making them suitable for installations where space is limited or a less obtrusive appearance is desired. This smaller size can be advantageous in tight spaces or when trying to maintain a specific architectural aesthetic with smaller fixtures.

Ease of Installation in Pre-Cut Holes

For retrofit installations or when working with pre-cut circular openings in ceilings or walls, round junction boxes often fit directly into these spaces with minimal modification. Old work round boxes with integrated mounting mechanisms simplify installation in existing drywall, providing a secure and convenient solution without requiring access to studs.

Versatile Mounting Options

Round junction boxes are available with various mounting options, including direct stud mounting, ceiling joist mounting with brackets, or old work clamps for drywall. This versatility allows them to be securely installed in a wide range of construction scenarios, ensuring a stable and code-compliant electrical connection regardless of the mounting surface.

convert rectangular junction box to round

Converting a rectangular junction box to accommodate a round light fixture or device typically involves using an adapter plate, often referred to as a “mud ring” or “plaster ring.” This intermediary piece provides a secure and standardized circular mounting surface. It’s a common practice when replacing existing rectangular boxes isn’t feasible or desired, allowing for a wider range of fixture styles to be installed.

Step 1: Select the Appropriate Round Adapter Plate

Choose a round adapter plate that is specifically designed to mount onto a rectangular junction box. Ensure the screw hole patterns on the adapter plate align with the mounting screw holes on your existing rectangular box. The adapter plate should also be appropriately sized to accommodate the footprint of your round light fixture or device, providing adequate support and coverage of the original rectangular opening.

Step 2: Secure the Adapter Plate to the Rectangular Box

Position the round adapter plate over the rectangular junction box, aligning the screw holes. Use screws (often included with the adapter plate) to firmly attach the plate to the mounting screw holes of the rectangular box. Ensure the adapter plate is securely fastened and sits flush against the wall or ceiling surface to provide a stable mounting base for the round fixture.

Step 3: Mount the Round Light Fixture or Device

Once the round adapter plate is securely in place, you can proceed to mount your round light fixture or device to the adapter plate. The adapter plate will have pre-drilled holes that match the standard mounting patterns for round fixtures. Follow the manufacturer’s instructions for your specific fixture to attach it securely to the adapter plate, ensuring all wiring connections are properly made within the junction box.

how to install round junction box in wall?

Installing a round junction box in a wall typically involves securing it to a wall stud or using appropriate drywall anchors if stud mounting isn’t feasible. The goal is to create a stable and recessed enclosure for electrical wiring and potentially a light fixture or other round device. Careful planning and secure mounting are essential for a safe and code-compliant installation.

Step 1: Determine the Location and Mark the Wall

Choose the desired location for your round junction box, ensuring it’s accessible for wiring and meets any specific requirements for the intended fixture or device. Use a stud finder to locate a wall stud if you plan to mount directly to it. Mark the center point of where the box will be installed on the wall. Use the outline of the round junction box to trace a circle on the drywall, indicating the area you’ll need to cut.

Step 2: Cut the Opening in the Drywall

Using a drywall saw or a utility knife, carefully cut along the traced circle. If you’ve located a stud, position the box so that at least one side can be directly attached to it. For installations between studs, you’ll need to use appropriate drywall anchors or old work boxes that have integrated mounting mechanisms. Ensure the opening is just large enough to accommodate the junction box.

Step 3: Secure the Round Junction Box to a Stud (If Applicable)

If your marked location aligns with a wall stud, position the round junction box so that its mounting holes or flanges are against the stud. Use wood screws of the appropriate length to securely fasten the box to the stud. Ensure the box is flush with the wall surface and tightly attached to provide a stable mounting point.

Step 4: Install an Old Work Box (If Not Mounting to a Stud)

For installations between studs, use a round “old work” junction box. These boxes have integrated clamps or wings that extend and grip the back of the drywall when screws on the front of the box are tightened. Insert the old work box into the cutout in the drywall. Tighten the screws on the box, causing the clamps or wings to swing out and secure the box firmly against the back of the drywall. Ensure the box is flush with the wall surface and well-supported.

Step 5: Run Wiring into the Junction Box

Once the round junction box is securely mounted, run the necessary electrical wires into the box through the provided knockouts. Use appropriate cable clamps to secure the wires to the box and provide strain relief. Leave sufficient wire length inside the box for making connections to the fixture or device.

Step 6: Connect Wiring and Mount Fixture/Device

Connect the electrical wires within the junction box according to your wiring plan and the instructions for your light fixture or device. Ensure all connections are secure and properly insulated. Carefully position the round light fixture or device over the junction box, aligning its mounting holes with those on the box or any attached mounting straps. Secure the fixture or device with the appropriate screws.

How to choose Aluminum junction boxes?

Choosing the best aluminum junction box requires careful consideration of several factors to ensure it meets the specific demands of your electrical project and environment. The size and capacity of the box are paramount; it must be large enough to accommodate all the wires, splices, and any potential devices without overcrowding, adhering to electrical code fill requirements. Consider the number and gauge of wires you’ll be running and any future expansion needs.

The environment where the junction box will be installed is another critical factor. For outdoor or damp locations, prioritize aluminum boxes with appropriate NEMA or IP ratings that indicate their resistance to water, dust, and corrosion. 

The construction and durability of the aluminum alloy used also matter; thicker walls and robust designs offer better protection against physical impact. Finally, consider the available knockouts or entry points and ensure they align with your wiring plan. The ease of installation and the availability of necessary mounting hardware should also be factored into your decision.

Here are key aspects to consider when selecting an aluminum junction box:

  • Size and Capacity: Ensure the internal dimensions are sufficient to house all conductors, connectors, and devices as per electrical code requirements, considering both current and potential future wiring needs to avoid overcrowding and ensure safe operation.

  • Environmental Rating (NEMA/IP): Select an appropriate rating based on the installation location; outdoor or wet environments necessitate higher ratings (e.g., NEMA 4X, IP66) to protect against water ingress, corrosion, and dust, ensuring the longevity and safety of the electrical connections.

  • Construction and Durability: Evaluate the thickness and quality of the aluminum alloy used; thicker walls provide better resistance to physical impact and harsh conditions, ensuring the box can withstand the rigors of its intended environment and protect the internal wiring effectively.

  • Knockouts and Entry Points: Verify the number, size, and location of knockouts or other cable entry points match your wiring plan and the size of the conduits or cables you will be using, ensuring ease of installation and a secure, protected pathway for the wiring.

  • Mounting Options and Ease of Installation: Consider how the junction box will be mounted (surface, wall, pole) and ensure the box has appropriate mounting features or accessories; ease of installation can save time and labor costs, especially for larger projects or installations in difficult-to-reach areas.

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All-in-one Round Junction Box Solutions for Your Project

Simplify your lighting and wiring installations with our all-in-one round junction box solutions. Offering a variety of sizes, depths, and knockout configurations, our round boxes provide a secure and code-compliant enclosure for your electrical connections. Whether for new construction or retrofitting, our comprehensive selection ensures a perfect fit for your project, streamlining installation and providing reliable performance for your lighting fixtures and devices.

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