By working safely and with the correct equipment, we ensure that everybody returns home safely. The ZennerNetworks patented Safe Isolation Device (ZN-SID) isolates electrical circuits up to 1000v AC/DC
Professional
We only offer the ZN-SID in the highest grade of Polybutylene Terephthalate (PBT) from the world leading supplier DuPont.
Approved
Rail industry approved and used by Transport for London (TFL) on the London Underground Tube network.