Securiflex Alarm Cable | DCA, LSZH, Type 1, 8 Core, 100m | White

FAQs

What is the difference between Type 1 and Type 3 alarm cable?

Type 1 alarm cable uses pure tinned copper conductors, while Type 3 uses TCCA (Tinned Copper Clad Aluminium) conductors. Type 1 offers superior electrical conductivity with lower DC resistance (100Ω/km vs 155Ω/km), resulting in better signal integrity and reduced voltage drop. This makes Type 1 ideal for longer cable runs and professional installations where performance is critical. Type 3 is more cost-effective and suitable for standard residential and commercial applications.

What does LSZH mean and why is it important?

LSZH stands for Low Smoke Zero Halogen. This cable construction uses special compounds that produce minimal smoke and zero halogen gases (such as chlorine, fluorine, or bromine) when exposed to fire. Halogen gases combine with moisture to form toxic acids that can harm people and damage sensitive equipment. LSZH cables are essential in enclosed spaces, underground installations, data centres, and anywhere where toxic fume emission could endanger lives or critical systems.

What does the Dca-s2-a1-d1 CPR rating mean?

This is the highest fire performance classification for alarm cables under the Construction Products Regulation. Dca indicates controlled fire propagation, s2 means limited smoke production, a1 indicates no flaming droplets, and d1 means no corrosive gases. This superior rating demonstrates exceptional fire safety characteristics and is required for the most demanding installations in public buildings, transport infrastructure, and critical facilities.

When should I use this cable instead of LSF or PVC versions?

Use this Type 1 LSZH cable when you need the highest level of fire safety performance, maximum electrical conductivity, or when building regulations mandate Dca classification and halogen-free construction. It’s essential for hospitals, underground installations, data centres, transport facilities, and any environment where toxic fume emission could be catastrophic. While more expensive than LSF or PVC versions, it provides unmatched safety and performance for critical applications.

Can this cable be used in all environments?

This cable is primarily designed for indoor installations with an operating temperature range of -40°C to 70°C. The LSZH construction is ideal for enclosed spaces and underground installations. However, for outdoor above-ground applications exposed to direct UV radiation, a PE jacketed cable would be more suitable. The LSZH version excels in fire safety but PE offers better UV and weathering resistance for outdoor exposure.

Is the extra cost of copper conductors justified?

For professional installations, longer cable runs, or critical systems, the answer is yes. Pure copper conductors offer 35% lower resistance than TCCA (100Ω/km vs 155Ω/km), which translates to better system reliability, reduced voltage drop, and the ability to run longer distances without signal degradation. In high-specification projects where system performance and longevity are paramount, the initial investment in copper conductors pays dividends through superior reliability and reduced maintenance over the cable’s lifetime.