3-phase distro boxes

Managing power across multiple circuits starts with having the right distribution in place. Our range of 3-phase distro boxes gives you a structured way to take a single high-capacity supply and break it down into usable, protected outputs across your setup. With a variety of configurations available, they’re suited to everything from controlled site work to larger, more demanding environments.

Built around a three-phase input, a 3-phase power distribution box takes power across L1, L2 and L3, along with neutral and earth, then distributes it across multiple circuits. Depending on the unit, it can support 3-phase, single-phase, or a mix of both, giving you the flexibility to run different types of equipment from a single supply.

With our 3-phase power distribution range, you can split power from 400A using the RUB4002, right down to 16A with the RUB1405 units. This gives you the ability to build out a flexible network of usable power across any setup.

A 32-amp 3-phase distribution box is typically suited to smaller or more controlled setups where power needs to be distributed cleanly across several outputs. For larger environments with higher overall demand, a 63-amp 3-phase distribution box offers additional capacity, allowing you to support more equipment from a single input. In both cases, the unit acts as a central point for routing and protecting power across your system.

With over 30 years of experience, we’re a well-established name in electric power distribution, supplying power distro boxes across the UK and to over 30 countries worldwide. That experience has seen our equipment used across everything from major sporting events and theatre productions to more demanding environments such as defence, aerospace, telecoms and data centres, where dependable power distribution is essential.

At Rubber Box, we know that keeping projects moving is just as important as the equipment itself. With next-day delivery available, same-day dispatch wherever possible, and many of our boxes ready to ship immediately, you can get what you need without unnecessary delays. If you’re unsure which distribution box is right for your setup, just get in touch with our team on 01282 677 910, and we’ll point you in the right direction.