Sheet-steel and stainless steel enclosures for 400/415 V three-phase distribution. Sized to your outgoing ways, with DIN rail, gland plates and door hardware to match the installation — supplied as a housing, or fitted to your component schedule.
It is rarely the enclosure itself — it is whether the size, sealing and internal space match the distribution design.
Two decisions drive the quote: what the enclosure has to survive, and what has to fit inside it.
| Housing material | Galvanised steel · stainless steel 304/316 · aluminium |
| Protection grade | IP54 · IP65 · IP66 (IP65 tested) |
| Finish | Powder coated (RAL on request) · brushed stainless |
| Mounting | Wall mounted · floor standing on plinth · pole |
| Door | Single or double, hinged left or right |
| Lock | Quarter-turn latch · key lock |
| Cable entry | Gland plate, bottom or top, cut to gland sizes |
| Internal | DIN rail · mounting plate · busbar supports |
| Dimensions | Custom, to drawing |
| Outgoing ways | 4 · 6 · 8 · 12 · 16 · 18 · 24 |
| Devices accommodated | MCB · RCBO · MCCB (customer-specified brands) |
| Phases | Three-phase 4-pole, or mixed 4P and 1P |
| System voltage | 400 / 415 V AC |
| Busbar | Supplied to drawing, or customer-supplied |
| Assembly | Empty housing, or fitted to component schedule |
Dimensions, sheet thickness and cut-outs are confirmed against your drawing before production. IP65 compliance, the CE LVD report and the type test report are available on request. The same process applies across our distribution box enclosures range.
Count the final circuits, then add spares. In a three-phase distribution box the real constraint is rarely the way count on its own — it is the total pole count. A 12-way box filled with four-pole devices needs four times the rail length of the same box filled with single-pole MCBs, and the enclosure depth has to leave room for the cable to bend.
As a working rule: list each outgoing circuit with its device type, add about 20 percent spare capacity, and size the enclosure from the resulting rail length. If the schedule is not fixed yet, tell us the expected ways and device type — we will quote the next size up rather than a box that has to be replaced in two years.
Mixed 4-pole and 1-pole ways are common in workshop distribution, where motors take four-pole breakers and lighting circuits take single-pole.
The enclosure has to suit the room, the cable route and the people who will open it.
For most outdoor sites a powder-coated steel housing at IP65 is enough. Where salt, chemicals or constant washdown are present — coastal installations, chemical plants, water treatment and food processing — specify stainless steel instead, because a coated surface will corrode and expose bare metal. Either version can be supplied with a rain hood and bottom entry to keep water away from the gland plate.
If the enclosure is fixed to a wall in a washdown area, specify IP66 and confirm the gland sizes before production — the most common sealing failure is a gland that does not match the cable.
Galvanised steel with powder coating covers most installations, indoors and outdoors, at the lowest cost per unit. It is the default for wall-mounted distribution boxes in plant rooms, workshops and commercial buildings.
Stainless steel is specified where the coating would fail: coastal sites, chemical plants, water treatment, food processing and anywhere chlorides are present. Grade 304 handles most coastal work; grade 316 is the safer choice where chlorides are concentrated or the enclosure is regularly washed down.
Aluminium is lighter and suits pole mounting where weight matters, but it needs isolation from steel structures to avoid galvanic corrosion at the fixing points.
Every quotation starts from your drawing or a sketch with the ways marked — not from a catalogue size.
A three-phase box distributes across three live conductors plus neutral, so it takes four-pole devices and can supply motor and HVAC loads that a single-phase board cannot. The enclosure is usually larger because the same outgoing ways need more pole space.
Count the final circuits you must feed, add spare ways for future load, then confirm the device type. Mixed 4-pole and 1-pole ways are common, and the enclosure is sized on the total pole count rather than the way count alone.
Yes. Many customers buy the housing only and fit their own devices on site. We supply the sheet metal, gland plate, DIN rail and door hardware to the drawing, and can also assemble to a component schedule if required.
IP65 is the practical minimum for an outdoor wall-mounted enclosure. Specify IP66 where powerful jets or washdown are expected, and confirm that the gland sizes match the cables before production.
Yes. Double doors are used once the way count or internal height makes a single leaf impractical, and they are supplied with a centre post and removable gland plate.
A drawing or sketch with dimensions and ways, the device schedule or pole count, the protection grade, mounting method and site environment. If a drawing is not ready, a marked-up photo of a similar installation is enough to start.
We confirm the enclosure size, protection grade and cable entry, then quote against your specification. If the drawing is not ready, a marked photo of the installation is enough to start.
Tell us the ways, device type and site conditions. We reply within 48 hours with a configuration and a quotation.
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