General
Nominal voltage	300/500 V
Test voltage	2000 V
Operation temperature	+70 °C
Installation temperature range	+5 to +70 °C
Temperature range after installation	-30 to +70 °C
Bending radius	15 x cable diameter -
Flame retardancy	VDE 0472 T. 804 test type B (IEC 332-1) -
Conductor	Copper bare, solid -
Insulation	PVC according to VDE 0207 -
Sheath colour	Black (RAL 9005) -

The H05V-U 0.75 SW wiring cable from Norbert Kordes is a PVC-insulated single-core cable for internal wiring of devices and for protected installations in and on luminaires, in conduits, on and under plaster. It is specifically designed for use in doorbell and signaling systems. The cable features a bare, single-strand copper conductor and PVC insulation in accordance with VDE 0207. The sheath colour complies with the standard VDE 0293-308, with black (RAL 9005) being offered as the standard colour. The cable is supplied in a length of 100 metres as a coil.

Applications

The cable is intended for use in enclosed and protected installations, for example in the interior fitting of household appliances, lighting systems, or in the wiring of doorbell systems. It must not be used for high-current applications or in open, unprotected areas, as it is not designed for outdoor use or for damp environments. Installation must take place exclusively in protected conditions, such as in conduits, pipes, or under plaster, with the ambient temperature during installation ranging between +5 °C and +70 °C.

Functions and Equipment in Detail

The cable consists of a solid, bare copper conductor, ensuring high electrical conductivity. The PVC insulation provides sufficient electrical insulation resistance and protects the conductor against mechanical stress and environmental influences. The standard sheath colour black, in accordance with VDE 0293-308, enables clear identification during wiring operations. The cable is designed for a maximum operating temperature of +70 °C, ensuring stable performance under normal operating conditions.

Technology Explained Simply

The rated voltage is 300/500 V, meaning the cable is suitable for applications with a voltage up to 500 V between conductor and earth and 300 V between two conductors. The test voltage of 2000 V serves as a safety margin and ensures electrical strength under load. The minimum bending radius is 15 times the cable diameter, allowing safe bending without damaging the conductor. Flame retardancy in accordance with VDE 0472 T. 804, test method B (equivalent to IEC 332-1), ensures that the cable does not burn rapidly in case of fire and does not release flammable gases, thus reducing fire hazard in indoor spaces.

Compatibility and Accessories

The cable is compatible with standard installations using other H05V-U or H07V-U cables, particularly in systems executed in accordance with VDE 0810 or similar standards. It can be connected using standard terminals, plug connectors, and screw terminals suitable for PVC-insulated cables with a cross-section of 0.75 mm². The use of special tools such as cable cutters or wire strippers is recommended to ensure clean processing.

Installation and Mounting

Installation must comply with VDE regulations and relevant installation standards. The cable must be installed in protected conditions, with the ambient temperature during installation ranging between +5 °C and +70 °C. After installation, the ambient temperature may drop to -30 °C without damaging the cable. The maximum operating temperature is +70 °C, which is not exceeded under normal use. The minimum bending radius of 15 times the cable diameter must be observed to avoid mechanical damage to the conductor.

Operational Advantages

The cable offers high electrical conductivity due to the bare copper conductor and reliable insulation thanks to the PVC sheathing. Flame retardancy in accordance with VDE 0472 T. 804, test method B, enhances safety in buildings. Use in doorbell and signaling systems enables reliable signal transmission without interference. Standardization of the sheath colour in accordance with VDE 0293-308 simplifies identification and maintenance of wiring. Supply in 100-m coils enables efficient storage and processing in operations.