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APPLICATION

Standard fire resistant cables for use primarily in fire detection, fire alarm, voice alarm, and emergency lighting circuits. These cables are designed to continue to operate for a period of time in a fire situation. ‘Standard’ fire resistance is recommended for general use.

STANDARDS

BS 7629-1, BS 5839-1 Low Smoke Zero Halogen to IEC/EN 60754-1/2, IEC/EN 61034-1/2

CHARACTERISTICS

Voltage Rating Uo/U : 300/500V

Temperature Rating : -40°C to +90°C

Minimum Bending Radius : 6 x overall diameter

CONSTRUCTION

Conductor : 1.5mm2 - 2.5mm2: Class 1 solid Copper
4mm2 and over: Class 2 stranded Copper
Insulation : High performance fire resistant silicone rubber
Overall Screen: Al/PET (Aluminium/Polyester Tape) 
Circuit Protective Conducto Tinned copper
Outer Sheath : LSZH (Low Smoke Zero Halogen)
Core Identification : 2 core: Blue     Black
3 core: Yellow      Red      Black+ Bare Earth
4 core: Yellow      Red      Black      Blue
Sheath Colour : Red               White

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DIMENSIONS

NO. OF CORES NOMINAL CROSS
 SECTIONAL AREA
mm2 		CONDUCTOR TYPE NOMINAL THICKNESS OF INSULATION
mm		 NOMINAL THICKNESS OF SHEATH
mm		 NOMINAL OVERALL DIAMETER
mm		 NOMINAL WEIGHT
kg/km
NO. OF CORES NOMINAL CROSS
 SECTIONAL AREA
mm2 		CONDUCTOR TYPE NOMINAL THICKNESS OF INSULATION
mm		 NOMINAL THICKNESS OF SHEATH
mm		 NOMINAL OVERALL DIAMETER
mm		 NOMINAL WEIGHT
kg/km
1 2/5 RE 0/8 1/4 6/15 62
1 4 RE 1 1/4 7/5 85
1 6 RE 1 1/4 7/5 108
1 10 RM 1 1/4 8/6 155
1 16 RM 1 1/4 9/6 218
1 25 RM 1/2 1/4 11/1 318
1 35 RM 1/2 1/4 12/1 414
1 50 RM 1/4 1/4 13/7 552
1 70 RM 1/4 1/4 15/5 750
1 95 RM 1/6 1/5 17/6 1020
1 120 RM 1/6 1/6 19/3 1259

CONDUCTORS

Class 1 Solid Plain Conductor

NO. OF
CORES		 NOMINAL CROSS SECTIONAL AREA
mm2		 EARTH WIRE CONSTRUCTION
n° /mm		 NOMINAL OVERALL DIAMETER
mm		 NOMINAL WEIGHT
kg/km
NO. OF
CORES		 NOMINAL CROSS SECTIONAL AREA
mm2		 EARTH WIRE CONSTRUCTION
n° /mm		 NOMINAL OVERALL DIAMETER
mm		 NOMINAL WEIGHT
kg/km
2 1/5 1/1.38 8 95
2 2/5 1/1.75 9/4 130
2 4 7/0.85 11/5 200
3 1/5 1/1.38 8/5 115
3 2/5 1/1.75 10 170
3 4 7/0.85 12/2 260
4 1/5 1/1.38 9/4 140
4 2/5 1/1.75 11 210
4 4 7/0.85 13/5 330

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ELECTRICAL

Clipped Direct

NOMINAL CROSS
SECTIONAL AREA
mm2		 CONDUCTOR RESISTANCE
AT 20ºC
Ω/km		 INSULATION RESISTANCE
AT 20ºC
MΩXkm		 NOMINAL CAPACITANCE
pF/m
NOMINAL CROSS
SECTIONAL AREA
mm2		 CONDUCTOR RESISTANCE
AT 20ºC
Ω/km		 INSULATION RESISTANCE
AT 20ºC
MΩXkm		 NOMINAL CAPACITANCE
pF/m
Core / Core Core / Screen
1 18/1 300 100 170
1/5 12/1 300 110 190
2/5 7/41 300 130 220
4 4/61 300 160 270

CURRENT CARRYING CAPACITY

Clipped Direct

NOMINAL CROSS
SECTIONAL AREA
mm2		 CURRENT RATING
Amps
NOMINAL CROSS
SECTIONAL AREA
mm2		 CURRENT RATING
Amps
2 Core 3 and 4 Core
1 19 17
1/5 24 22
2/5 33 30
4 45 40
 

In Conduit or in Cable Tray

NOMINAL CROSS
SECTIONAL AREA
mm2		 CURRENT RATING
Amps
NOMINAL CROSS
SECTIONAL AREA
mm2		 CURRENT RATING
Amps
2 Core 3 and 4 Core
1 17 15
1/5 22 19/5
2/5 30 26
4 40 35
 

VOLTAGE DROP

Clipped Direct

NOMINAL CROSS
SECTIONAL AREA
mm2		 VOLTAGE DROP
mV/A/m
NOMINAL CROSS
SECTIONAL AREA
mm2		 VOLTAGE DROP
mV/A/m
2 Core 3 and 4 Core
1 45 39
1/5 30 26
2/5 18 15
4 11 10
 

In Conduit or in Cable Tray

NOMINAL CROSS
SECTIONAL AREA
mm2		 VOLTAGE DROP
mV/A/m
NOMINAL CROSS
SECTIONAL AREA
mm2		 VOLTAGE DROP
mV/A/m
2 Core 3 and 4 Core
1 45 39
1/5 30 26
2/5 18 15
4 11 10
 

DE-RATING FACTORS

For Air Temperature other than 30°C (DE-RATING FACTOR at 30°C = 1)

AMBIENT TEMPERATURE 25ºC 35ºC 40ºC 45ºC 50ºC 55ºC
AMBIENT TEMPERATURE 25ºC 35ºC 40ºC 45ºC 50ºC 55ºC
DE-RATING FACTOR 1/04 0/95 0/9 0/85 0/8 0/74