Description
85x50mm Waterproof Box: Compact Protection for Critical Connections
An 85x50mm waterproof box is a small yet robust enclosure engineered to safeguard electrical connections from harsh environmental conditions. The dimensions (85mm in length and width, and 50mm in depth) offer a compact footprint while providing sufficient internal space for terminal blocks, connectors, or small circuit boards . These boxes are essential for maintaining the integrity and safety of electrical systems exposed to rain, dust, or condensation. Whether used for a garden lighting splice, an outdoor security camera, or an industrial sensor, this enclosure ensures that your wiring remains dry, clean, and secure, significantly extending the service life of the installation .
85x50mm Waterproof Box: Key Specifications
| Specification | Details |
|---|---|
| External Dimensions | 85mm (L) x 85mm (W) x 50mm (H) |
| Internal Dimensions | Varies by manufacturer, typically slightly smaller |
| Material | High-Impact ABS (Acrylonitrile Butadiene Styrene) |
| Protection Rating | IP55 (Dust-protected and protected against water jets) |
| Cable Entries | Typically 7 pre-scored knock-outs |
| Entry Hole Size | 25mm diameter (suitable for M25 cable glands) |
| Flammability Rating | UL94 V-0 (Flame retardant) |
| Color | White or Grey |
| Certifications | CE, RoHS |
85x50mm Waterproof Box: Construction and Material Quality
These enclosures are predominantly manufactured from ABS (Acrylonitrile Butadiene Styrene), a thermoplastic prized for its excellent impact resistance, rigidity, and toughness . The material is also formulated to be flame-retardant, often meeting the UL94 V-0 standard, meaning it will self-extinguish in the event of a fire, adding a critical layer of safety .
The defining feature of a truly waterproof box is its sealing mechanism. High-quality units feature an integrated, form-fitting foam gasket bonded to the lid . When the lid is secured, this gasket compresses against the base, creating a positive seal that prevents the ingress of water and dust, achieving the IP55 rating .
85x50mm Waterproof Box: IP55 Protection Explained
The IP55 (Ingress Protection) rating confirms the box’s suitability for demanding environments . This two-digit code provides a clear standard of protection:
First Digit (5):Â The enclosure is dust-protected. While not completely dust-tight, any dust that enters will not interfere with the operation of the equipment.
Second Digit (5):Â The enclosure is protected against low-pressure water jets (6.3mm nozzle) from any direction. This makes it suitable for outdoor use where it will be exposed to rain, hose-down, or splashing water.
This rating ensures reliable performance in locations such as building exteriors, gardens, and industrial workshops.
85x50mm Waterproof Box: Design and Installation Features
Designed with the installer in mind, these boxes feature multiple pre-scored knock-outs on the sides for cable entry . Typically, there are 7 knock-outs with a diameter of 25mm, designed to accept standard M25 cable glands . Using appropriate glands is crucial for maintaining the IP55 rating, as they provide a waterproof seal around the cable itself .
Mounting is flexible and straightforward:
Internal Mounting: Bosses or pillars inside the base allow for the mounting of PCBs or DIN rails .
External Mounting: Pre-drilled holes in the base corners allow the box to be securely screwed or nailed directly onto walls or other flat surfaces . Some models include a separate mounting bracket to maintain the IP seal .
85x50mm Waterproof Box: Applications
The compact size and robust protection make this box suitable for a vast array of applications :
Outdoor Lighting:Â Housing connections for garden lights, landscape lighting, and exterior wall lights.
CCTV and Security Systems:Â Protecting the cable connections for security cameras from rain and moisture.
Telecommunications: Enclosing fiber optic splices or Ethernet connections in outdoor cabinets .
Industrial Automation: Housing sensors, relays, and control circuitry in workshops or factories .
Marine and Offshore: Protecting electrical systems on boats, docks, and coastal installations from saltwater corrosion .
Agricultural Technology: Securing connections in irrigation systems and automated farming equipment .
Renewable Energy: Serving as a junction box for solar panel arrays .
85x50mm Waterproof Box: Quality and Compliance
Quality enclosures are manufactured to meet international safety and environmental standards. Look for certifications such as CE (conformity with European safety standards) and RoHS (restriction of hazardous substances), which are common indicators of a well-made product . When installed correctly with suitable cable glands, this waterproof box provides a long-lasting, secure, and compliant solution for protecting electrical connections in any environment.
