The Case for Low Smoke Zero Halogen Cable Labels & Public Safety

Published 11 Nov 2019

The Case for Low Smoke Zero Halogen Cable Labels & Public Safety

  • uploaded by Chris Dodds - Thorne & Derrick Sales & Marketing Manager

Low Smoke Zero Halogen Cable Labels

Today’s world of modern, intelligent and complex buildings demands the highest safety performance from their electrical cables and cable accessories including cable labels.

Traditional BS5467 cable (LV power cable) is constructed with PVC sheathing – in a fire PVC cables release toxic smoke and gasses posing safety threats to people and plant.

To enhance public safety a Low Smoke Zero Halogen (LSZH) power cable was developed for installation in highly populated enclosed public areas.

This low voltage power cable is a LSZH version of the established BS5467.

The cable was given a specific British Standard category – BS6724.

Installing BS6724 Low Smoke Zero Halogen (LSZH) power cable is an investment in public safety – therefore why compromise that safety by then installing sub-standard cable accessories, such as cable labels?

BS6724 power cable is extensively specified for low voltage power distribution to electrical construction and building projects in the UK – especially in public areas where fire, smoke emissions and toxic fumes could potentially threaten both lives and equipment.

Typical BS6724 cable applications include hospitals, museums, retail, offices, airports, rail stations, sports stadium, tunnels, shopping centres and commercial developments.

Silver Fox & The Rail Industry

Network Rail & LUL Approved

T&D are Main Distributors for Silver Fox, the UK leading manufacturer of Wire & Cable Labeling Systems for the identification of Electrical, Instrumentation, Security, Data & Telecoms cables in the rail industry.

When exposed to fire, BS6724 Low Smoke Zero Halogen cable sheathing emits very low levels of smoke and non-toxic levels of halogen gas (typically under 0.5% HCl emission).

Silver Fox “Fox-Flo®” cable labels are safe and provide protection against all aspects of fire hazard including smoke and gas emissions, flame spread and heat release.

Network Rail & LUL Approved

Network Rail & LUL Approved

Why Use Low Smoke Zero Halogen Cable lABELS?

Safe, risk free cables should not be compromised by sub-standard cable accessories, such as cable labels, which could emit life-threatening levels of toxic smoke and gasses in the event of a fire. In fire situations, PVC based cables and cable markers can be a vehicle for flame propagation whilst also generating smoke, corrosive and toxic fumes.

Effectively fuelling the fire.

Where contractors are installing low smoke, zero halogen and flame-retardant power cables for low voltage distribution indoors, outdoors, buried or in air, careful attention should be made to specifying equal-specification cable accessories to preserve LSZH circuit integrity.

Tie-on LS0H Cable Labels (Heat Shrink) – Silver Fox Fox-Flo

Tie-on LS0H Cable Labels (Heat Shrink) – Silver Fox Fox-Flo®

For instance The Silver Fox “Fox-Flo®” cable labels are the perfect cable marking system for Prysmian Afumex Low Smoke Zero Halogen cablesPrysmian Afumex, is the market leading Low Smoke Zero Halogen Cable.



Other LSZH Cable Applications for Silver Fox Cable Labels : 6491B Single Core Conduit Cables, 6242B Twin Flat Wiring Cables, Screened Wiring Cables and LSZH building cables for power, lighting and sub mains distribution.

Silver Fox Cable Labels

Relationship with Fire

  • Low Smoke Emission – traditional PVC and plastic cable markers release thick black smoke which obscures escape routes and causes asphyxiation, reducing the public’s ability to respond in an emergency which can result in mass panic.
  • Low Corrosive Gas Emission – although often invisible, when burnt, PVC emits acidic gas which causes corrosion and failure of electronic equipment. Toxic gasses incapacitate the public trying to escape the burning building.
  • Reduced Flame Propagation – when exposed to flame cables and labels should self-extinguish when the flame source is removed.

Cable Labels - Low Smoke Zero Halogen

Silver Fox Fox-Flo Zero Halogen Tie-on Cable Labels – Flame Test

LV, MV & HV Jointing, Earthing, Substation & Electrical Eqpt

Thorne & Derrick International are specialist distributors of LV, MV & HV Cable Installation, Jointing, Duct Sealing, Substation & Electrical Equipment – servicing UK and global businesses involved in cable installations, cable jointing, substation, overhead line and electrical construction at LV, 11kV, 33kV and EHV.

THORNE & DERRICK Product Categories: Duct Seals | Cable Cleats | Cable Glands | Electrical Safety | Arc Flash Protection | Cable Jointing Tools | Cable Pulling | Earthing | Feeder Pillars | Cable Joints LV | Joints & Terminations MV HV 

Thorne & Derrick International

Further Reading