What is voltage rating?

The voltage rating of a cable is the highest voltage that may be continuously applied to a cable construction in compliance with the relevant cable standard or specification.

Voltage rating figures for cables are normally expressed in A.C. RMS. (Alternating Current Root Mean Square) and are written as a figure Uo/U (Um)

Uo = Rated voltage phase to Earth

U = Rated voltage phase to phase

Um = Maximum system

Return to FAQs


Cable Portfolio

View our comprehensive range of power, data, control and instrumentation cables and accessories

Lab Black

Cable Testing

Read more on the different tests we conduct in our Cable Laboratory

the Tests
Case Studies (1)

Case Studies

Read about some of the projects we've worked on, spanning all industries

Read on