Skip to content

Engineering · Selection · Installation

When is a cable-to-busway transition needed?

Use a cable feed box when cables supply the busway run.

When a bill of materials says “cable transition” or “cable tap box”, confirm the direction of power flow: an incoming feed box is not the same as an outgoing tap-off unit.

Selection reference

When is a cable-to-busway transition needed?
ComponentFunctionWhen to specify it
Cable feed boxReceives cables and supplies the runThe incoming connection uses cables
Connector with feed boxJoins busway to the feed boxThe connector plate must match the box
Panel connectorInterface with a switchboardA direct equipment connection is specified
Tap-off unitSupplies an outgoing loadYou need a branch from the run

Source: LVA manual §5.10–5.11; Data Pro manual §5.3–5.4.

Coordinate the final interface and dimensions with the equipment and site survey.

More suitable if…

It is more suitable if you need to retain an incoming cable link while using busway for downstream distribution.

Not ideal if…

It is not ideal if a direct switchboard connection is practical and the extra box only adds volume and connections; compare the interfaces first.

Frequently asked questions

Does cable tap box always mean an incoming feed box?

No; specify whether cables supply the run or leave it to feed a load.

What information should you send?

Model, rated current, voltage, conductors, cable and terminal details, equipment drawing, orientation and environment.

Is the box universal?

No; the connector plate and box must match the selected interface and model.

Can Data Pro be fed by cable?

Yes; its manual describes a cable feed box with or without a touchscreen.

From drawing to estimate

A defined transition avoids site modifications and keeps cables only where their flexibility adds value.

All technical guides

Specialist product · GM-Z

Are you looking for medium-voltage busway?

GM-Z is a cast-resin busway built for medium-voltage power: typically the link between generators, transformers and switchgear in power plants and large industrial sites.

It is engineered and quoted project by project. Most commercial and industrial buildings need a low-voltage system such as LVA or GM instead.

Read the GM-Z overview