Outdoor electrical enclosures face challenges that indoor housings never encounter. Rain, wind, temperature fluctuations, UV exposure, dust ingress and condensation all work to compromise the equipment inside. Off-the-shelf plastic enclosures and standard polycarbonate boxes handle basic outdoor applications, but installations involving higher power loads, heavy cable runs, or exposure to physical impact and vandalism demand something more robust.
Our outdoor weatherproof electrical enclosures are fabricated from mild steel, stainless steel or aluminium sheet, formed and welded into fully sealed housings that achieve IP65, IP66 and higher protection ratings. Every weatherproof enclosure is designed for the specific conditions it will face, whether that means a compact wall mounted electrical box on the side of a building or a large free-standing outdoor electrical enclosure for an industrial site.
Because we fabricate to order rather than selling from stock, there are no restrictions on size, configuration or feature specification. If your application calls for integrated ventilation, cable entry glands, mounting rails, anti-condensation heaters, switches for external isolation, or specific door locking mechanisms, we build them into the design from the outset. This is a fundamental advantage of custom fabrication over modifying off-the-shelf products to suit non-standard requirements.
IP ratings define the level of protection an enclosure provides against the ingress of solid particles and liquids. Understanding the correct rating for your outdoor installation is critical to long-term reliability and equipment safety.
The IP rating system uses two digits. The first digit (0 to 6) indicates protection against solid objects including dust. The second digit (0 to 9) indicates protection against water ingress. A higher number means greater protection. For outdoor electrical enclosures in the UK, the minimum practical starting point is typically IP55, with most applications requiring IP65 or IP66.
IP55 provides protection against limited dust ingress and low-pressure water jets from any direction. This rating suits sheltered outdoor locations where the enclosure is positioned under a canopy, overhang or similar structure that reduces direct rainfall exposure. It is also appropriate for covered loading bays, open-sided warehouses and semi-exposed industrial areas.
IP65 offers complete dust-tight sealing combined with protection against low-pressure water jets from all angles. This is the most common specification for outdoor enclosures for electrical equipment across general external environments in the UK, including car parks, retail sites, housing developments and light industrial estates. An IP65-rated enclosure will handle normal rainfall, wind-driven rain and routine cleaning without admitting water to the interior.
IP66 provides dust-tight protection with resistance to powerful water jets from all directions. This rating is specified for fully weatherproof enclosures in exposed locations, industrial washdown areas and sites where high-pressure cleaning is routine. Roadside electrical enclosures for traffic systems and street furniture are frequently specified to IP66 to ensure reliability across all weather conditions.
We fabricate outdoor weatherproof electrical enclosures to meet any of these ratings. The specific construction methods, gasket materials and sealing approaches we use are determined by the target IP rating, the enclosure geometry and the environmental conditions at your installation site. Where required, we can also produce enclosures to IP67 for temporary submersion resistance.
All enclosure panels and profiles are produced by laser cutting on our CNC fibre laser, delivering clean edges and tight tolerances across every component. Enclosure bodies are formed by CNC folding on our LVD press brakes, producing precise bends that ensure weatherproof housings assemble squarely with consistent gasket compression. Sealed construction is achieved through MIG and TIG welding, with weld quality directly affecting the enclosure’s long-term weatherproof integrity.
Material selection is one of the most important decisions in outdoor enclosure design. The right choice depends on the environment, the expected service life, budget constraints and whether the enclosure’s appearance matters alongside its function.
Powder coated mild steel is the most cost-effective option for external electrical enclosures that need structural strength and robust weather resistance. The powder coating provides a durable barrier against corrosion, and the mild steel substrate offers excellent impact resistance. This combination is ideal for use outside in car parks, distribution centres, industrial estates and roadside infrastructure where the enclosure must resist both weather and physical contact. Powder coating is available in a wide range of RAL colours and textures, allowing enclosures to blend with their surroundings or comply with corporate colour schemes.
Stainless steel electrical enclosures are specified in corrosive environments including coastal installations, chemical plants, water treatment works and areas subject to salt spray or aggressive cleaning agents. Grades 304 and 316 both offer excellent atmospheric corrosion resistance, with 316 providing additional protection in chloride-rich environments. Stainless steel outdoor enclosures typically require no painting, reducing long-term maintenance costs in remote or difficult-to-access locations.
Aluminium offers a lightweight, naturally corrosion-resistant alternative for outdoor power enclosures and remote equipment housings. Its low weight makes aluminium enclosures significantly easier to handle on site, which is a practical benefit for pole-mounted installations, elevated positions and locations with restricted vehicle access. Aluminium can be powder coated or anodised for additional protection and visual consistency.
While plastic and GRP cabinets have their place in certain outdoor applications, metal construction remains the preferred choice for enclosures carrying higher electrical loads, housing heat-generating equipment, or requiring enhanced physical security against vandalism and forced entry. Metal enclosures also provide better EMC shielding performance, which is increasingly important as more sensitive electronic and communications equipment moves into outdoor installations.
Condensation is one of the most common causes of equipment failure in outdoor electrical enclosures. When the air temperature inside an enclosure drops below the dew point, moisture forms on internal surfaces and components. Over time, this leads to corrosion of terminals, degradation of insulation, and potential electrical faults.
Effective condensation management starts at the design stage. We work with customers to understand the heat load of the enclosed equipment, the expected temperature range at the installation site, and whether the enclosure will be subject to rapid temperature changes. Based on this information, we can incorporate ventilation panels with filtered air paths, thermostatically controlled heaters, breather valves or drain points into the enclosure design.
For sealed enclosures where ventilation is not practical due to dust or water exposure, internal anti-condensation heaters maintain the air temperature above dew point during cold periods. These low-wattage heaters are mounted inside the enclosure and controlled by a thermostat or humidistat, running only when conditions require them. We can fit heater mounting provisions and thermostat cutouts as part of the enclosure build, so your electrical team can complete the installation efficiently on site.
We manufacture weatherproof enclosures for a broad range of outdoor and external applications across the UK.
Roadside electrical enclosures for traffic management systems, street lighting control, CCTV networks and communications equipment are a regular part of our production. These enclosures need to withstand years of continuous outdoor exposure with minimal maintenance while remaining secure against vandalism and tampering. They are typically specified in powder coated mild steel or stainless steel, designed to meet IP66, and fitted with tamper-resistant locking hardware.
Outdoor electrical distribution enclosures for industrial sites, construction compounds and temporary power supplies are designed for robust performance in demanding working environments. We accommodate features such as external switches, indicator lights, cable management systems, removable access panels and reinforced mounting points for heavy internal equipment.
Car park and EV charging infrastructure enclosures house payment systems, barrier controls, access readers and charging electronics in locations that combine high public footfall with full weather exposure. Our enclosures for these applications are built to handle the combination of environmental protection, anti-vandal resistance and visual presentation that public-facing installations require.
Large outdoor electrical enclosures for plant rooms, substations and telecoms equipment provide the space needed to house complex equipment while maintaining full weatherproof integrity. Internal layouts are designed around the equipment being housed, with cable routes, mounting positions and access zones planned during the design phase.
Outdoor enclosures for electrical equipment in agricultural and remote monitoring applications round out our production mix. Remote telemetry equipment, weather station housings and site monitoring systems all require reliable outdoor protection in locations where maintenance visits may be infrequent.
Every outdoor electrical enclosure we produce is built to order. Our engineering team works with your design files or requirements to produce a fully weatherproof enclosure that fits your specific application, site constraints and equipment layout.
We accommodate custom cutout patterns for cable glands, ventilation louvres, display windows, switches, lights and access doors. Internal mounting arrangements including DIN rails, cable trays, back panels, sub-plates and equipment shelves are fabricated and fitted as part of the build. Door configurations range from single hinged to double-door, removable panel, and full rear access depending on maintenance requirements and the size of the equipment being installed.
For outdoor enclosures in sizes and specifications that fall outside standard catalogue offerings, custom fabrication is frequently the more practical and economical route. There are no minimum order quantities, and our setup process means we can produce one-off prototypes or short production runs with the same attention to quality and detail as longer batches.
Every outdoor enclosure starts from the same custom electrical enclosures design process, ensuring your housing is engineered around your specific equipment and site requirements.
For most general outdoor installations across the UK, IP65 or IP66 is appropriate. IP65 provides full dust protection and resistance to water jets, while IP66 adds protection against powerful water jets and heavy driving rain. Coastal and exposed sites may require IP66 or above combined with stainless steel construction for long-term corrosion resistance.
Yes. We fabricate large outdoor electrical enclosures for plant equipment, telecoms infrastructure and industrial control systems. Internal layouts are designed around your specific equipment and access requirements. Size is determined by your application rather than constrained by catalogue dimensions.
With appropriate material selection and surface treatment, metal outdoor enclosures provide decades of reliable service. Powder coated mild steel performs well in general outdoor environments with periodic inspection and maintenance. Stainless steel is recommended for coastal, chemical or washdown settings where corrosion resistance is critical to achieving a long service life without repainting or remedial work.
We can supply outdoor enclosures with internal mounting hardware, DIN rails, cable management systems, back plates, anti-condensation heaters and other sub-assemblies fitted during production. This reduces your on-site installation time and ensures consistent build quality across production batches.
In practical terms, weatherproof generally refers to enclosures rated to IP65 or IP66 that resist rain, wind-driven water and dust in normal outdoor conditions. Waterproof typically implies a higher level of protection such as IP67, which provides resistance to temporary submersion. The correct specification depends on your installation environment and the level of water exposure the enclosure will face.
Need a quote, technical advice or lead time confirmation? Send us your drawings or specifications and one of our engineers will get back to you with clear pricing and a realistic schedule.
Call 0117 951 7572 or email sales@hocklynn.co.uk
