Three Phase Power Distribution Box
Three-phase power on site usually arrives at one point and has to be spread across floors, cabins and work fronts. A portable box puts that split in a case with handles, so the supply can follow the work instead of the other way round.
Incoming is 400V three-phase through an isolator and MCCB, with 16A and 32A outlets on the outgoing side. Phase rotation, neutral and earth are checked at assembly, so the box can be connected to a generator or a building supply without re-terminating.
Protection, Metering and Portable Build
The box is designed to be carried by one person and connected by an electrician: the case is compact, the cover opens fully, and every way is labelled to match the drawing supplied with the unit.
- 400V three-phase incoming, 32A to 125A
- 16A / 32A CEE outlets, 6 to 12 ways
- MCB or 30 mA RCBO on each way
- Per-phase voltmeter and ammeter
- IP44 to IP67 enclosure, stackable or trolley mounted
Typical Specifications
| Parameter | Options |
|---|---|
| Incoming | Three-phase 400V, 32A to 125A |
| Outgoing | 16A / 32A CEE, 6 to 12 ways |
| Protection | MCB or 30 mA RCBO per way, MCCB incomer |
| Metering | Per-phase voltmeter and ammeter |
| Enclosure | IP44, IP55, IP65 or IP67 |
| Build | Portable case with handle, stackable or trolley |
| Neutral | Full-size neutral for LED and motor loads |
| Documentation | Single-line diagram and test record |
| Standards | Assemblies to IEC 61439-1 / -2, IP to IEC 60529 |
Frequently Asked Questions
What size three phase box do I need?
Add up the connected load of every tool and appliance that may run at once, then check it against the supply available. Most site boxes sit between 32A and 125A incoming with 6 to 12 outgoing ways, and a spare way is worth keeping for later work.
Can a portable box run from a generator?
Yes. The incoming is a standard three-phase connection, and we check phase rotation at assembly. Confirm the generator has a compatible outlet and a suitable earth arrangement before the box is connected.
Which IP rating should I choose?
IP44 suits indoor site use and covered areas. For outdoor work, wash-down or dusty sites, specify IP65 or IP67 and confirm that the plugs and glands match that rating.
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