General
Nominal voltage	300 V
Test voltage	800 V
Loop resistance	73,2 Ohm/km
Current carrying capacity	5,1 A
Operating capacity	100 nF/km
Insulation resistance	100 MOhm x km
Capacitive coupling K1	300 pF
Capacitive coupling K9-12	100 pF
Line attenuation	1,1 dB/km
Installation temperature range	-5 to +50 °C
Operation temperature	+70 °C
Bending radius	7.5 x cable diameter -
Bend radius single without tension	2.5 x cable diameter -
Burning behaviour	VDE 0472 Part 804, test type C -
Core diameter	0,8 mm
Wire insulation	Cross-linked polymer HI1 -
Conductor marking	according to VDE 0815 -
Stranding	4 conductors to star quad, 5 star quads to bundle -
Static shield	Plastic-laminated metal foil (metal side inward) and bare twin wire -
Outer sheath	Polyolefin blend HM2 -
Sheath colour	Grey RAL 7001 -
Halogen free	Yes -
Flame retardant	Yes -

The J-H(ST)H 2X2X0,8 Bd grey is a halogen-free installation cable from manufacturer VDE-Kabel, specifically designed for use in telecommunication and data processing systems. It is used for the transmission of telephone, measurement, and signal signals, as well as in telephone station and private branch exchange systems for telecommunication installations of all classes. The cable is suitable for use in dry and damp operating environments and can be installed on, in, and under plaster. Its static shield ensures reliable limitation of external electromagnetic interference fields, improving signal quality in electrically noisy environments. In the event of fire, it exhibits improved behavior: no fire-related damage occurs due to halogen-containing gases, smoke development is low, and no corrosive gases are released.

Applications
This cable is intended for use in buildings with high fire safety requirements, particularly in office buildings, administrative buildings, hospitals, and other facilities where telecommunication and data processing systems are operated. It is suitable for connecting telephone systems, telephone stations, private branch exchange systems, as well as for measurement and signal transmission systems. Installation takes place indoors, and the cable can also be used in damp areas, provided there is no direct moisture or condensation.

Functions and Features in Detail
The cable consists of bare, single-strand copper conductors with a diameter of 0.8 mm. Each conductor is insulated with cross-linked polymer HI1 according to VDE 0207 Part 23. Conductor identification follows VDE 0815. The cabling is arranged in star quad (4 conductors per star quad), with 5 star quads bundled together. The bundle is layered with tape. The static shield consists of a plastic-laminated metal foil (metal side inward) and a bare twin wire, providing effective shielding against external electromagnetic interference. The outer sheath is made from a polyolefin mixture HM2 according to VDE 0207 Part 24, halogen-free and flame-retardant. The sheath color is grey, corresponding to RAL 7001.

Technical Details Explained
The rated voltage is 300 V, and the test voltage is 800 V, defining the cable’s electrical load capacity. The loop resistance is 73.2 Ohm/km, ensuring good signal transmission over long distances. The current-carrying capacity is 5.1 A, indicating the maximum current the cable can safely transmit. The operating capacitance is 100 nF/km, and the insulation resistance is 100 MOhm x km, indicating high insulation quality. The capacitive coupling K1 is 300 pF, and K9-12 is 100 pF (at 100 m length and 800 Hz), describing interference between conductors. The cable attenuation is approximately 1.1 dB/km at 800 Hz, indicating signal loss over length. The temperature range for installation is -5 °C to +50 °C, while the maximum operating temperature is +70 °C. The bending radius is 7.5 times the cable diameter for normal bending and 2.5 times for single bending without tension. The burning behavior complies with VDE 0472 Part 804, test type C (equivalent to IEC 332-1), indicating low flame propagation and flame-retardant properties.

Compatibility and Accessories
The cable is suitable for use in existing and new installation systems, especially in systems requiring halogen-free materials. It is compatible with standard connectors and plug connectors for telecommunication cables. Use in combination with other halogen-free cables and lines is possible, provided electrical and mechanical requirements are matched.

Installation and Mounting
The cable can be installed on, in, and under plaster. During installation, a minimum bending radius of 7.5 times the cable diameter must be observed; for single bending without tension, it is 2.5 times. Installation takes place indoors, with ambient temperatures during installation ranging from -5 °C to +50 °C. The cable is not intended for outdoor use, as no specific weather resistance or UV resistance is specified.

Operational Advantages
The halogen-free composition of the cable reduces the formation of toxic gases and smoke in case of fire, increasing building safety. The flame-retardant properties prevent rapid fire spread. The static shield ensures high resistance to interference, improving signal quality in electrically noisy environments. The cable is suitable for use in various operating environments, including damp rooms, provided there is no direct moisture. The maximum operating temperature of +70 °C allows use in rooms with increased thermal load.