Hishield® Cables
Polyethylene Insulated
PVC Insulated
Technical Tables

Draka 5308 PVC Insulated Cable



Application

This specification covers multicore and multipair cables used in the provision of communication services and the interconnection of electrical equipment and instruments, particularly in and around process plants, where transducer generated signals are transmitted through marshalled circuits to panels, controllers and associated devices.

Cables to Part 1 are widely used throughout the petroleum industry, while Part 2 are more common to the chemical and petrochemical industries.

Type 1 unarmoured cables are generally for indoor applications.

Type 2 armoured cables are suitable for burial underground.

These cables are designed for use in intrinsically safe systems. However, it must be noted that cables used when installing an intrinsically safe system are required to conform to any relevant requirement on the certification documents, either for the system or for the intrinsically safe and associated apparatus forming parts of the system. Cables should also be suitable for the environment in which they are going to be used.

Construction

1

Plain annealed copper conductors to BSEN 60228.

2

Type TI51 PVC insulation to BSEN 50290-2-21.

3

Individual pair screen (optional)-
a) Aluminium/polyester tape, metallic side down, in contact with minimum 0.5mm2 tinned copper drain wire.
b) Polyester isolating tape(s) numbered for identification.

4

Polyester binder tape.

5

Collective screen (optional) -
Aluminium/polyester tape, metallic side down, in contact with minimum 0.5mm2 tinned copper drain wire.

6

Type TM51 PVC sheath to BSEN 50290-2-22.


1

Plain annealed copper wire conductors to BSEN 60228.

2

Type TI51 PVC insulation to BSEN 50290-2-21.

3

Individual pair screen (optional)-
a) Aluminium/polyester tape, metallic side down, in contact with minimum 0.5mm2 tinned copper drain wire.
b) Polyester isolating tape(s) numbered for identification.

4

Polyester binder tape.

5

Collective screen (optional) -
Aluminium/polyester tape, metallic side down, in contact with minimum 0.5mm2 tinned copper drain wire.

6

Type TM51 PVC bedding conforming to BSEN 50290-2-22.

7

Single layer galvanised steel wire armour to BS EN 10257-1.

8

Type TM51 PVC sheath to BSEN 50290-2-22.



Technical Data

Maximum conductor operating temp:

+ 65°C.

Minimum ambient temp:

-20°C after installation and only when cable is in a fixed position.

Maximum working voltage:

300/500V r.m.s.

Test voltage:

1000V r.m.s. between conductors and between conductors and screen/armour.

Maximum conductor d.c. resistance: Ω/km at 20°C
Conductor Size Multicore Multipair
16/0.20mm (0.5mm2) 39.0 39.7
24/0.20mm (0.75mm2) 26.0 26.5
7/0.53mm (1.5mm2) 12.1 12.3
Minimum insulation resistance:

Individual conductors - 25 MΩ/km at 20°C. Between individual screens - 1 MΩ/km at 20°C.

Maximum mutual capacitance at 1Khz:

Pair of adjacent cores - 250 pF/m at 1KHz.

Maximum capacitance to screen:

450pF/m at 1KHz.

Maximum L/R ratio:
Conductor Size  
µH/Ω
0.5mm2
25
1.0mm2
25
1.5mm2
40
Spread of flame:

Type 1 complies with EN 50265, IEC 60332-1.

Type 2 complies as type 1, additionally with EN 50266, NMV 1.5, IEC 60332-3C.

Minimum bending radius : radius:

Type 1 - 5 x overall diameter.
Type 2 - 6 x overall diameter.
Type 3 - 15 x overall diameter.


NOTE: These cables are not suitable for direct connection to a low impedance source e.g. the public mains supply.

Availability

Cables in this range are manufactured to customer order. Alternative constructions e.g. other conductor sizes or pair/core combinations, generally to this specification, can also be produced to order. Specifications to suit individual customer requirements, based on the BS 5308 specification, can also be manufactured. Our technical personnel are available to provide information and assistance in designing cables for your specific installation and operating requirements.

RP, RPLHCL.

For applications where flame spread and the emission of acid gas is critical, Draka offer a range of bedding and sheathing compounds with an Oxygen Index between 30 & 35 and, on selected materials acid gas emission of less than 15% by volume at 800°C.

Customers should specify if they require:

RP - LOI greater than 30.
RPLHCL - LOI greater than 30, acid gas emission less than 15% by volume at 800°C.
Please state a particular LOI if required.

ZERO HALOGEN, LOW SMOKE (OHLS)

For applications where minimal smoke and acid gas emissions are crititcal, Draka's proprietary OHLS® compounds are rated Zero Halogen, Low Smoke to BSEN 50267(IEC 60754) and BSEN 50268(IEC 61034).

Where any of these options are ordered, customers should specify if the compound is required on the bedding (where applicable), the sheath, or both (where applicable).

Draka offer designs utilising these materials that can comply with the appropriate category for the cable size in BSEN 50266 : Part 3 (IEC 60332-3).

Please contact Draka to discuss your particular requirements.

 Download the individual data sheet for PVC insulated cables

 Download Cables Brochure to see the whole range of industrial cables by Draka

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