Outdoor distribution boxes
- Protection: IP65 / IP66 water- and dust-protected, door gasket + cable glands at entries
- Rainproof: sloped top prevents water pooling, raised bottom, outdoor weather-resistant coating
- Condensation-resistant: internal heater or anti-condensation treatment to prevent day-night temperature differential condensation
- Material: carbon steel (outdoor weather-resistant coating) or stainless steel 304/316L
- Testing: seal inspection on every unit + rain test, powered functional test
Specifications
The table below covers 80% of factory distribution room cases. Anything outside it we can still build — those are engineered items, quoted separately, with an indicative price the same day.
| Box Type | Outdoor floor-standing / wall-mounted distribution box, single-door / double-door |
|---|---|
| Material | Cold-rolled carbon steel (outdoor weather-resistant coating) / stainless steel 304 / 316L |
| Standard dimensions | Wall-mounted 400×500×250 to 800×1000×300 mm; floor-standing 600×400×1200 to 1000×600×1800 mm, custom sizes available |
| Enclosure construction | Sheet steel bent and welded + reinforcing ribs, sloped top, raised bottom or mounting base |
| Surface treatment | Degrease, derust, phosphate → outdoor weather-resistant coating (carbon steel) / bare stainless steel, weather- and salt-spray-resistant |
| IP rating | IP65 / IP66 (door gasket + cable glands + hinge seals) |
| Rainproof and condensation-resistant | Sloped top prevents water pooling + raised bottom + internal heater for condensation prevention |
| Door and lock | Multi-point door lock, optional outdoor-duty locks and tamper-resistant design |
| Application | Outdoor distribution / control / metering / hybrid, configured to drawing |
|---|---|
| Rated voltage | AC 380V / 400V or DC, depending on application |
| Component configuration | Breakers, contactors, relays, PLCs, meters and other components assembled to drawing |
| Cooling | Sealed heat dissipation for outdoor enclosures; ventilation or thermal design added where required |
| Grounding | Grounding terminals + grounding busbar, ground continuity tested |
| Component brands | Schneider / ABB / Siemens / Chint |
| Street lighting control boxes | Roadway lighting circuit control, with photocell / timer control |
|---|---|
| Pump station distribution box | Outdoor distribution and control for pump station pumps and fans |
| Temporary power box for construction sites | Temporary construction power distribution, rainproof and dustproof |
| Meter Box | Outdoor meter box, tamper-resistant and rainproof |
| Landscape and plaza power distribution | Landscape lighting, fountain and plaza power distribution |
| Outdoor equipment control box | Local control for outdoor equipment, with pushbuttons and indicator lights on the door |
| Reference standards | GB/T 7251.1 / IEC 61439-1 (assemblies); GB/T 7251.3 (distribution boxes) |
|---|---|
| IP rating | GB 4208 / IEC 60529, IP65 / IP66 |
| Rain test | Rain / spray verification to the specified ingress protection (IP) rating |
| Insulation resistance | ≥1 MΩ (500V megohmmeter) |
| Power frequency withstand voltage | Main circuit 2500V / 1 min, control circuit 1500V / 1 min |
| Factory tests | Seal inspection, rain test, circuit check, dielectric withstand, ground continuity, powered functional test |
| Documents with shipment | Electrical schematic, component list, BOM with brand and model, test report, factory photos |
Five steps to specify your run
A configuration summary is generated as you go. It travels with your inquiry, saving a round of confirmation.
Build details
Systems have been in service for decades, and the failure points are always the same few: poor busbar contact, water ingress at the door seal, high temperature rise in the correction cabinet, and mis-phased outgoing feeders. The six hard rules below are written for exactly these points — every cabinet can be traced to them.
Sloped roof prevents water pooling
The roof is sloped so water runs off instead of sitting. A flat-roof cabinet pools water in heavy rain, and over time the seal fails and water gets in.
Raised off the ground at the base
The bottom of the enclosure is raised or fitted with a base, keeping it 200–300 mm off the ground. Ground moisture, standing water and splash never reach the bottom of the box directly.
Fully sealed door seams and cable glands
Door gaskets plus cable glands for incoming and outgoing lines — that is what makes IP65/66 real. On outdoor boxes, the vast majority of water entry points are the door seams and the cable entries.
Anti-condensation heating inside the enclosure
In outdoor environments with large day-night temperature swings, an anti-condensation heater is installed inside the enclosure. Condensation is harder to prevent than rain — it forms out of the air itself.
Weather-resistant outdoor coating
Carbon steel enclosures use an outdoor weather-resistant coating that resists sun and rain without fading or chalking. Standard indoor paint starts peeling within one to two years outdoors.
Rain test performed
Before shipment, rain / spray testing is carried out according to the ingress protection rating — it does not stop at printing an IP number on the label.
Photos & enclosure construction
Below are photos taken in our own shop — from the complete unit down to the internal busbars and secondary wiring. Every build detail can be checked item by item.
Image key: 01–05 are shop photos (the numbers match the shot list). The line drawing shows the front elevation of the enclosure; dimensions match the specification table above.
Where these cabinets go
These are the routine applications — we can talk scheme and configuration directly. For the industry view, see the industry pages.
Roads and street lighting
Power distribution and control for street lighting and traffic facilities.
Pump stations and flood drainage
Power distribution for outdoor pump stations and flood drainage stations.
Job sites and temporary power
Temporary distribution boxes for job sites, rainproof and dustproof.
Landscape and plazas
Power distribution for landscape lighting, fountains and plazas.
EV charging station support
Outdoor distribution boxes for EV charging stations.
Outdoor equipment control
Local control boxes for outdoor equipment.
Commercial terms
Specification dated September 2026; quotations follow this.
| Drawings & design | Free |
| MOQ | 1 unit (5 or more recommended for production) |
| Production lead time | 15-25 days after drawing approval |
| on-time delivery | 98% |
| Warranty | 12 months |
| Loading port | Ningbo / Shanghai, China |
| Component brands | Schneider / ABB / Siemens / Chint |
| Factory visit & dispatch confirmation | Factory visits welcome; finished-cabinet photos and video before dispatch |
| Capacity | 5,800+ units / year |
Documents for your engineering team
Selection manual, outline dimensions and RFQ checklist — for the customer's electrical engineer. All three documents are being organized by product line; download links go live once complete.
Six questions procurement and electrical engineers ask most
What is the difference between IP65 and IP66?
Both are water- and dust-tight. IP66 has a higher water protection rating than IP65 and withstands stronger water jets. Simple way to remember: IP65 protects against low-pressure water jets, IP66 against powerful water jets. For ordinary outdoor rain, IP65 is enough; for coastal areas or high-washdown environments, IP66 is recommended.
Does an outdoor box get condensation? How do you prevent it?
Yes — when day-night temperature swings are large, moisture in the air inside the enclosure condenses. We prevent this with an internal heater or anti-condensation treatment, and where necessary a ventilation design to balance temperature and humidity. Condensation is a hidden cause of outdoor box failures and is harder to notice than water ingress.
How do I choose between carbon steel and stainless steel?
For ordinary outdoor environments, carbon steel with an outdoor weather-resistant coating offers the best value; for coastal, chemical or damp corrosive environments, choose stainless steel. If the budget allows and the environment is harsh, going straight to stainless steel saves trouble.
Should the base be raised?
Yes, raising it is recommended. Keep it 200–300 mm off the ground to prevent ground moisture and standing water from reaching the bottom of the box. A floor-standing design with a base is best; for wall-mounted units, install as high as possible.
Can you make street lighting controls?
Yes. Outdoor distribution boxes can be fitted with photocell and timer controls for circuit control of road lighting. Send us the control method and number of circuits, and we will configure a solution.
What do you need for a quote?
Material, ingress protection rating, mounting method, application and control method, number of circuits, operating environment. Drawings are best; without them, we will propose a solution based on application and circuit count.
Other cabinet types in the same main circuit
Related products use color-block placeholders for now (product photos not yet complete; they will be replaced together). Internal links will be filled in once live URLs are confirmed.
Need reliability in rain and sun? Get the sealing details right
Send us your application, ingress protection rating and circuit count for a free outdoor box solution · quote within 24 hours. Direct from the source factory, MOQ 1 unit, 15–25 day lead time, 1-year warranty.
ISO 9001:2015 · CE(LVD+EMC) · CQC · IP65
When you write, include: single-line diagram or primary scheme, switch room layout, load list, and component brand requirements. You do not need complete drawings — capacity and cabinet type are enough to start.