What is ZHLS cable?

Cable with a sheath that gives off little smoke and no halogen gases if it burns. ZHLS = zero halogen, low smoke.

Why: In enclosed spaces a burning PE sheath gives off thick toxic smoke, so inside buildings, subsurface stations and long tunnels the sheath type matters for safety.

Where: Subsurface stations, long tunnels, and inside buildings or REBs where the internal run is long. Standard PE-sheathed cable may only run a limited distance in before ZHLS is needed.

Where the rules are

• NR/L2/TEL/30160 cl 6.9.4where ZHLS fibre cable is mandatory
• NR/L2/TEL/30160 cl 6.9.2how far PE cable may run into a building, REB or equipment room
• NR/L2/TEL/31200 cl 8.5.3ZHLS high-capacity fibre cable
• NR/PS/TEL/00015 cl 8ZHLS copper cable for runs inside buildings, REBs and tunnels
• NR/PS/TEL/00014 cl 8ZHLS armoured fibre cable construction

What to order

• 432F LSZH armoured fibre cable (building entry) · Fujikura · HIO-OGNM12WTZTWBE-CTZE-ACEx432C
• CW1308B 20PR 0.5 INT/EXT LSOH C/W AL TAPE BLACK 1X30M · Eland · A8TCW1308B2005L

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On the drawing

Cable type is shown on the SLD cable labels and in the cable schedule.

Also called: LSZH, LSOH, low smoke zero halogen, LSHF

Guidance in our words. Read the current issue of each standard before you design to it.