HENSEL DE Series White Polycarbonate Junction Box, IP55, 50 x 88 x 88mm

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Schneider Electric Mureva Series Grey Polypropylene Junction Box, IP55, 275 x 120 x 325mm


Junction boxes, also known as electrical outlet boxes or J boxes, are weatherproof outdoor enclosures that provide secure housing for electrical wiring and devices. They protect electrical components from external forces like weather, neighbouring materials, and vandalism.

Junction boxes also serve as connectors to a pattress and are often found behind downlighters. Unlike pull boxes, they form an integral part of circuit protection systems where circuit integrity is crucial, such as for emergency lighting, emergency power lines, or wiring between a nuclear reactor and a control room.

## **How Do Junction Boxes Work?**

Junction boxes provide entry points for electrical cables. Choosing the correct size and type is crucial for safety and compliance with the relevant rules and regulations. These boxes may feature:

- Knockouts
- Integrated threads
- Self-sealing membranes

Internally, they have mounting points for screws, so using the correct masonry plugs, anchors, and fixings for the surface (wall, skirting board, or ceiling) is essential. A sealed lid or cover provides security for all the internal components.

## **Popular Junction Box Materials**

Junction boxes are commonly made from a variety of materials, each with its own unique advantages:

- **Polycarbonate:** Renowned for its durability and impact resistance, polycarbonate is an excellent choice for outdoor junction boxes, capable of withstanding harsh weather conditions.
- **Thermoplastic:** Thermoplastic junction boxes offer good insulation properties, making them resistant to heat and various chemicals.
- **Polypropylene:** A lightweight and cost-effective option, polypropylene is also resistant to corrosion, making it suitable for both indoor and outdoor use.
- **Stainless Steel:** Known for its durability and resistance to corrosion, stainless steel junction boxes are ideal for demanding industrial environments and applications where longevity is crucial.
- **Plastic (General):** Plastic junction boxes encompass a wide range of polymers, offering versatility, affordability, and ease of installation.
- **Polystyrene:** Lightweight and inexpensive, polystyrene junction boxes are often used for indoor applications where impact resistance is not a primary concern.
- **Aluminium:** Lightweight yet durable, aluminium junction boxes provide good electrical conductivity and are suitable for various applications.

While both plastic and metal junction boxes are suitable for most household projects, it's important to note that metal boxes must be properly grounded and connected to the circuit's ground system to ensure electrical safety.

## **Types of Junction Boxes**

Junction boxes are versatile electrical enclosures used in various applications, with prices varying based on size and purpose. Common types include:

- **Surface-Mounted Junction Boxes:** These boxes are installed directly on the surface of walls or ceilings, typically for outdoor use or where easy access to wiring is needed. They are often used for outdoor lighting, switches, or other electrical fixtures.
- **Flush-Mounted Junction Boxes:** Designed to sit flush with the surface of a wall or ceiling, these boxes provide a neat and discreet appearance. They are commonly used for indoor applications like light switches, outlets, or other electrical connections where a seamless finish is desired.
- **Recessed Junction Boxes:** These boxes are installed within walls or ceilings, typically between studs. They are used for a wide range of electrical equipment, including switches, outlets, and other devices that require a concealed installation.

Each type of junction box offers specific advantages depending on the application and desired aesthetic outcome. Choosing the right type ensures proper functionality and compliance with electrical codes.

## **IP Ratings for Junction Boxes**

Junction boxes are available with various Ingress Protection (IP) ratings, indicating their level of protection against dust and moisture ingress:

- IP20
- IP2X
- IP40
- IP44
- IP54
- IP55
- IP65
- IP66
- IP67
- IP68

Choosing the appropriate IP rating for your junction box is crucial to ensure its proper functioning and longevity in the intended environment. Higher IP ratings offer greater protection against harsh conditions, making them suitable for outdoor or industrial applications.

## **Applications of Junction Boxes**

Junction boxes are essential components in a wide range of industries, providing safe and reliable electrical connections in various settings:

- **Industrial Environments:** In factories and processing plants, junction boxes safeguard electrical connections in machinery, control panels, and automated production lines.
- **Commercial Buildings:** Junction boxes are used in commercial spaces like offices, retail stores, and restaurants to house electrical wiring and protect connections for lighting, HVAC systems, and other electrical equipment.
- **Outdoor Installations:** Weatherproof junction boxes are crucial for outdoor applications such as street lighting, signage, traffic signals, and security systems, ensuring reliable operation in harsh environmental conditions.
- **Hazardous Locations:** Specialised junction boxes are designed for use in hazardous areas like chemical plants, oil refineries, and mining operations, providing explosion-proof enclosures for electrical equipment to prevent ignition in potentially explosive atmospheres.
- **Residential Construction:** Junction boxes are commonly used in residential wiring for connecting electrical circuits, installing switches, outlets, and light fixtures, ensuring safety and compliance with electrical codes.

## **Delivery Information**

RS offers prompt delivery of junction boxes and related items like [outdoor wall enclosure](https://sg.rs-online.com/web/c/enclosures-server-racks/enclosures/wall-boxes/) and [lockable electrical enclosure](https://sg.rs-online.com/web/c/enclosures-server-racks/enclosures/general-purpose-enclosures/) within Singapore. Shop top brands like Schneider Electric, HellermannTyton, and Eaton, and enjoy next-working-day delivery on eligible online orders (Terms & Conditions apply). Visit our [Delivery page](https://sg.rs-online.com/web/content/support/all-articles/delivery) for more details regarding our full range of delivery services and fees.



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IP55 Junction Boxes

63 Products showing for IP55 Junction Boxes

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