Technical characteristics of alarm wires

- Maximum working temperature of alarm wire: -40 °C up to +50 °C;

- Permissible relative humidity of wire at +35°C – 98%;

- Resistivity of conducting cores of alarm cables to direct current, translated to 1 km length and 20°C:

- For cores of 0,5mm cable diameter – 96Ohm/km;

- For cores of 0,8 mm cable diameter - 36,6 Ohm/km;

- For cores of 0,75 mm² section – 26Ohm/km.

- resistivity of core insulation and protection cover of alarm cables translated to 1 km length and 20°C, no less, - 150 MOhm;

- Testing direct current voltage for 1 min applied to:

- Between cores and core screen – 750V;

- Between cores of working pairs of cable – 1000V;

- Set up of cables are to be done with temperature no less than - 10°C with bending radius no fewer than 15 times of outside diameter of cables.

- Lifetime of cables - at least 10 years. Actual lifetime is not limited by indicated period, but defined by technical state of cable;

- Security alarm cables are indicated as SECURITY ALARM;

- Fire alarm cables are indicated as FIRE ALARM;

Structure of fire alarm cables:

Insulation color of alarm core cables:

- First pair “red-black”

- Second pair “white-yellow”

Cables cover made of PVC inflammable elastron.

Alarm cables application:

Alarm cables with copper cores in plastic insulation (PE or PVC) in cover made of PVC inflammable elastron are made to transfer signals of diagnosis and security alarm and used in power wires of security alarm as well. Used for nominal alternating voltage up to 300V and 50Hz frequency.

For laying inside of buildings in cable channels, on internal walls to transfer diagnosis and security alarms and used in power wires of security alarm as well. Cables with aluminum polyethylene screen are used in places with high electrical interference.