624B/Twin and Earth/LSZH Cable

Detail

Parameters

BS 7211 624-B

Twin and Earth LSZH Cable

APPLICATION

Installation in walls, on boards and in channels or embedded in plaster. For installations where fire, smoke emissions and toxic fumes create a potential risk to life and equipment.

CONSTRUCTION

Conductor

1mm2 to 2.5mm2: Class 1 solid conductor according to BS EN 60228 (previously BS 6360)

4mm2 to 10mm2: Class 2 stranded conductor according to BS EN 60228 (previously BS 6360)

Circuit Protection Conductor (Earth)

1mm² to 2.5mm²: Class 1 solid copper conductor 4mm² to 16mm²: Class 2 stranded copper conductor

Insulation

XLPE (Cross-Linked Polyethylene) Type LTS2

Sheath

LSZH (Low Smoke Zero Halogen) Type GP8

CABLE STANDARDS

BS 7211, IEC 60754-1, IEC 60754-2, IEC 61034,

BS EN/IEC 60332-1-2

CHARACTERISTICS

Voltage Rating (Uo/U) 300/500V

Temperature Rating

-20°C to +70°C

Minimum Bending Radius

3 x overall diameter

Core Identification

Sheath Colour

DIMENSIONS

UNIQUE PART NO.	NO. OF CORES	NOMINAL CROSS SECTIONAL AREA	CROSS SECTIONAL AREA OF CIRCUIT PROTECTIVE CONDUCTOR	NOMINAL WEIGHT
UNIQUE PART NO.	NO. OF CORES
		mm²	mm²	kg/km
UNIQUELSZHBVVB2X1	2	1	1	65
UNIQUELSZHBVVB2X1.5	2	1.5	1	76
UNIQUELSZHBVVB2X2.5	2	2.5	1.5	108
UNIQUELSZHBVVB2X4	2	4	1.5	148
UNIQUELSZHBVVB2X6	2	6	2.5	208
UNIQUELSZHBVVB2X10	2	10	4	317

CONDUCTORS

Class 1 Copper Conductor for Single and Multi-Core Cables

NOMINAL CROSS SECTIONAL AREA	MAXIMUM RESISTANCE OF CONDUCTOR AT 20ºC
mm²	Plain Wires ohms/km
1	18.1
1.5	12.1
2.5	7.41
4	4.61
6	3.08
10	1.83

ELECTRICAL CHARACTERISTICS

Current Carrying Capacity and Voltage Drop

NOMINAL CROSS SECTIONAL AREA mm²	REFERENCE METHOD A* (IN CONDUIT IN WALL) Amps	REFERENCE METHOD C* (CLIPPED DIRECT) Amps	VOLTAGE DROP mv/A/m
1	11.5	16	44
1.5	14.5	20	29
2.5	20	27	18
4	26	37	11
6	32	47	7.3
10	44	64	4.4
16	57	85	2.8