PAS BS 5308 Part 1 Type 2 PE/IS/OS/PE/SWA/PVC Cable
APPLICATION
Publicly Available Standard (PAS) BS 5308 cables are designed
to carry communication and control signals in a variety of
installation types including those found in the petrochemical
industry. The signals can be analogue, data or voice type and
from a variety of transducers such as pressure, proximity or
microphone.Part 1 Type 2 cables are designed where a greater
degree of mechanical protection is required or where there is
direct burial at a suitable depth. Individually screened for
enhanced signal security.
CHARACTERISTICS
Rated Voltage :Uo/U: 300/500V
Rated Temperature:
Fixed: -40ºC to +80ºC
Flexed: 0ºC to +50ºC
Minimum Bending Radius: 12D
CONSTRUCTION
Conductor
0.5mm² - 0.75mm²: Class 5 flexible copper conductor
1mm² and above: Class 2 stranded copper conductor
Insulation: PE (Polyethylene)







I. Overview
BS 5308 Part 1 Type 2 PE/IS/OS/PE/SWA/PVC Cable is a cable product specifically designed to meet a variety of complex application scenarios. Its unique structural combination reflects comprehensive considerations in terms of electrical performance, mechanical protection, and environmental adaptability, and it is widely used in various industrial, construction, and special - facility fields.
II. Structural Composition
(I) Polyethylene (PE) Inner Insulation Layer (IS)
Core Guarantee for Electrical Insulation
As the first line of defense for insulation inside the cable, the PE inner insulation layer has excellent electrical insulation performance. It can effectively block abnormal conduction of current between conductors, ensuring that electrical energy is transmitted along the predetermined path. Its high insulation resistance characteristic enables the cable to maintain a good insulation state when subjected to the rated voltage or even a certain degree of over - voltage, preventing dangerous situations such as electrical short - circuits.
Support for Structural Stability
The PE inner insulation layer is uniform in texture and has a certain elasticity, providing stable support for the internal structure of the cable. When the cable is subjected to external forces such as bending, stretching, or slight compression, it can maintain its shape and electrical insulation performance, thereby ensuring the integrity of the overall cable structure and the stability of the electrical performance.
(II) Polyethylene (PE) Outer Insulation Layer (OS)
Enhanced Electrical Insulation Performance
The PE outer insulation layer located outside the inner insulation layer further improves the electrical insulation capacity of the cable. Working in tandem with the inner insulation layer, it forms a double - layer insulation protection, greatly reducing the risk of current leakage and enhancing the safety of the cable in complex electrical environments. In some places with extremely high insulation requirements, such as substations and precision electronic equipment workshops, this double - layer PE insulation structure can effectively meet strict electrical insulation standards.
Chemical Stability and Moisture - proof Property
The PE outer insulation layer has good chemical stability and can resist the erosion of external chemical substances. At the same time, it also has a certain moisture - proof property, preventing moisture from seeping into the cable interior and avoiding a decline in electrical performance or damage to the insulation layer caused by a humid environment, thereby prolonging the service life of the cable.
(III) Steel Wire Armour (SWA)
Mechanical Protection Barrier
The steel wire armour is an important mechanical protection structure of the cable. It can withstand strong external mechanical pressures, such as the extrusion of heavy objects on the ground during underground laying, collisions with equipment in industrial sites, and accidental impacts during construction. This sturdy armour structure effectively protects the insulation layer and conductors inside the cable, ensuring that the cable can still operate normally in a harsh mechanical environment.
Electromagnetic Shielding Effectiveness
The SWA has a significant electromagnetic shielding effect. In areas with electromagnetic interference, such as near large - scale power equipment and communication base stations, the steel wire armour can effectively block the interference of the external electromagnetic field on the signal transmission inside the cable, and also prevent the internal signals of the cable from radiating outward to interfere with other devices, ensuring the accuracy and stability of signal transmission.
(IV) Polyvinyl Chloride (PVC) Outer Sheath
External Environmental Protection
The PVC outer sheath provides comprehensive external protection for the cable. It can resist the encroachment of various environmental factors, including ultraviolet radiation, chemical corrosion, and mechanical abrasion. In an outdoor exposed environment, the PVC outer sheath can prevent the aging effect of ultraviolet rays in sunlight on the internal materials of the cable; in a chemical environment, it can resist the erosion of chemical substances; in places subject to frequent friction, such as inside cable trays, it can reduce the damage to the cable caused by mechanical abrasion.
Identification and Differentiation Function
The color of the PVC outer sheath can be customized according to different application requirements, which is of great significance in a complex cable wiring system. Outer sheaths of different colors can be conveniently used to identify the purpose, voltage level, or affiliated circuit of the cable, etc., which helps to quickly and accurately identify the cable during installation, maintenance, and fault - finding processes, improving work efficiency.