LSF Low Smoke Zero Halogen Cable Joints LSF low smoke, halogen free resin cable joints suitable for jointing LSF (Low Smoke & Fume), LSOH (Low Smoke Zero Halogen) and flame retardant cables to BS6724. CTL Clearcast LSF resin cable joints are flame retarded, halogen-free with low smoke and fume emission to VO rating of UL94. Also - Heat Shrink Cable Joints for LSF & LSOH Cables. LSF cables and cable joints are generally specified where there is a likelihood of toxic fumes being released into confined public spaces in a fire situation - this includes tunnels, theatres, concert halls, sports arenas and educational centres. Typical underground road and rail tunnel cable jointing applications include power and emergency lighting circuits - this includes straight and branch LSF cable joint kits. OHLS Zero Halogen Low Smoke is the trademark of Draka UK while LSF Low Smoke Fume was BICC’s and LSOH Low Smoke Zero Halogen is Pirelli's trademark. These cable terms were coined the with the development of the low emission sheathing materials used on cables specified in BS6724 and more recently in other British Standards. In the context of BS cables produced by reputable manufacturers, these terms have much the same meaning, as the requirements for ‘low emission of smoke a corrosive gases when affected by fire’ are rigorous and clearly defined. Where the terms are used more widely it may be necessary to specify the minimum fire performance requirement for each cable in terms of the appropriate Euro Norms EN’s as follows :- Corrosive and Acid Gas Emission – EN 50267 Smoke Emission - EN 50268 Flame propagation - EN 50265 and EN 50266 LSF Low Smoke Zero Halogen Cable Joints T&D UK distribute an extensive range of Low Smoke and Fume electrical equipment including cable ties, cleats, glands and terminations. Video : LSF (Low Smoke Fume) vs LSHF (Low Smoke Halogen Free - Zero Halogen). Flame Test. LSF vs LSHF - Cables & Accessories. There is a difference. To clear up the confusion that still remains over the difference between LSF (Low Smoke and Fume) and LSHF (Low Smoke Halogen Free) cables, FS Cables recorded a very simple cigarette lighter test to show the difference. Using a the same piece of unscreened data cable in both LSF and LSHF version, a simple cigarette lighter flame was applied to both cables. The results are startling. As you can see the LSF cable very quickly begins to burn and give off black smoke. By contrast, see how the LSHF cable burns cleanly when exposed to the same heat source. The sheath swells and will eventually burn through in the same way as LSF but it is only producing a tiny amount of white smoke and almost no flame. As a rule of thumb, if the application calls for a data, signal or control cable in LSF, question it. If its a public access building such as an airport, hospital, prison, or hotel, where evacuation in the event of a fire may be restricted you will almost certainly need LSHF cable.

1. CTL
Low Smoke
CLEARCAST
10
LV Resin Cable Joints - Low Smoke Zero Halogen
suitable for PVC or XLPE cable, 1kV
Distinguished by its yellowtinted injection-moulded shells,
CTL’s range of Low Smoke Zero
Halogen cable joints has been
especially developed to meet
the increasing demand for
joints that match the characteristics of modern flame retardant, fire resistant and low smoke
cables.
To reflect the specialist application, these joints can be
installed without the need for
dedicated tools or the application of heat.
All of the popular and wellestablished features of standard
CTL joints have been retained.
Internationally, there are several standards that regulate
fire behaviour. CTL products
conform to the following
national standards:-
UK:- BS 476 Part 7,
Class 1Y rating.
Germany:- DIN 4102/part 1, B1
rating.
France:- NFP 92 501, 5 & 16, M2
rating.
A typical kit consists of an outer
shell manufactured from UV
stable , low smoke, zero halogen, flame retardant material
that matches or exceeds the
relevant properties of similarly
specified cable.
For the majority of applications
it is only the shell that requires
specialist fire-sensitive properties. In these cases CTL’s standard two-part polyurethane
resin is supplied in easy-mix
pouches.
When specifications call for the
resin to also be flame retardant,
halogen-free and low smoke,
joints are shipped with CTL’s
CR171H resin which is flame
retardent to V0 rating of UL94.

2. LV Resin Cable Joints - Low Smoke Zero Halogen
Specifications - CTL Low Smoke Zero Halogen cable joints
Properties of shell
Flammability
Flame retardant
Flame class rating: 3mm
Flame class rating: 1mm
Glow wire test, 1 mm, 850 ºC
Low Smoke
Smoke density 4 min
Halogens
Mechanical
Tensile strength at yield (speed 50mm/min)
Impact
Charpy Impact, notched
Thermal
Thermal conductivity
Electrical
Dielectric strength
Volume resistivity
Surface resistivity
Properties of resin type CR171H
Flammability - Flame class rating: 6mm
Physical properties
Operating temperature
Thermal conductivity
Shrinkage
Coefficient of linear expansion
Electrical properties
Volume resistivity
Surface resistivity
Electric strength
Permittivity
Main Cable
2, 3 & 4 core (mm2)
Straight Joints
1.5, 2.5, 4, 6
10, 16
25
35, 50, 70
95, 120
150, 185
240, 300
400
Branch Joints
1.5, 2.5, 4, 6, 10
16, 25, 35
Rating
Relevant standard
V-0
V-2
Pass
UL94
UL94
IEC 695-2-1
Dm < 200
Free
AIRBUS Standard ABD 0031
DIN VDE 472 part 815
63 Mpa
ISO 527, DIN 53455
30 kJ/m2
ISO 179/2C
0.20 W/m ºC
DIN 52612
17kV/mm
1015 Ohm.m
1015 Ohm
IEC 243, ASTMD 149
IEC 93, DIN53482
IEC 93, DIN53482
V-0
UL94
-40º C to +105º C
0.75 W/mK
Low
Low
11 - 13 log Ohm
12 - 14 log Ohm
> 16 MV/m
3.2 @ 1 KHz
Branch Cable
2,3 & 4 core (mm2)
Part No
CM0LSHF
CM1LSHF
CM2LSHF
CM3LSHF
CM4LSHF
CM6-07LSHF
CM6-08LSHF
CM7-08LSHF
1.5, 2.5, 4, 6, 10
16, 25, 35
CB1LSHF
CB2LSHF
Accessories
a) Brass connectors with Allen head screws for Cu or Al conductors.
b) Aluminium alloy connectors with shear-head bolts & brass gauze for Cu or Al conductors
c) Copper or aluminium crimp ferrules
CLEARCAST
Zero Halogen
suitable for PVC or XLPE cable, 1kV
CTL
WWW.CABLEJOINTS.CO.UK
THORNE & DERRICK UK
TEL 0044 191 490 1547 FAX 0044 191 477 5371
TEL 0044 117 977 4647 FAX 0044 117 977 5582
WWW.THORNEANDDERRICK.CO.UK
See page 15 for Hazardous Area
Cable Glands.
See page 17 for cable clamps, troughs and “J”
hooks especially designed for the rail industry.
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