What is BS EN 50441-4 - Cables for indoor residential telecommunication installations about?
BS EN 50441 is a series on cables for indoor residential telecommunication installations. Cables are an assembly of one or more wires running side by side or bundled, which are used to carry electric current. BS EN 50441-4 specifies the constructional details and performance requirements for cables for installation in indoor residential cabling systems characterized up to 1 200 MHz. Cables in BS EN 50441-4 are based on the common design rules specified in EN 50290-2-1 and are specifically intended for supporting ICT and BCT applications (telephone, computer, and TV services) as specified in EN 50173-4.
The cables covered in BS EN 50441-4 are intended to operate with voltages and currents normally encountered in communication systems. These cables are not intended to be used in conjunction with low impedance sources, for example, the electrical power supply of public utility mains. Cables covered in BS EN 50441-4 may however be subjected to voltages of not more than 300 V a.c or 450 V d.c and comply with the requirements of the Low Voltage Directive. The maximum current rating per conductor is 3 A/mm² unless otherwise specified in BS EN 50441-4.
Who is BS EN 50441-4 - Cables for indoor residential telecommunication installations for?
BS EN 50441-4 on cables for indoor residential telecommunication installations is useful for:
- Telecommunication component manufacturers
- Telecommunication equipment manufacturers
- Design engineers
- Quality control personnel
Why should you use BS EN 50441-4 - Cables for indoor residential telecommunication installations?
Electrical cables are used to connect two or more devices, enabling the transfer of electrical signals or power from one device to the other. BS EN 50441-4 introduces cables that are installed in ducts, in raceways, directly buried in plaster, surface mounted by glueing or stapling. Additional tests may be undertaken where agreed between customer and manufacturer to establish the compatibility between the cable sheath and the glue or the plaster or to establish the stapling ability. The installation tube system consists of four 90° bends with a radius of 60 mm each. These four bends will be connected with tube pieces with a length of 800 mm. The maximum inner diameter of the tubes is three times the cable diameter.
Tubes are selected to represent the installation material of the local market. The pulling force needed to pull the cable through the tube system is monitored. Return loss and coupling attenuation are checked on the sample after having performed the installation test. For return loss, the complete 50 m samples are tested from both ends. For coupling attenuation, a random sample out of 50 m is tested. The transmission measurements are performed on cable samples of 100 m laid out without stress. Other sample configurations that satisfy the performance recommendations of BS EN 50441-4 and BS EN 50441-4 will be deemed to be acceptable provided correlation to the reference method has been verified. In case of conflict, the first method (100 m, off-reel) should be used. Using BS EN 50441-4 specifies the constructional details and performance requirements for cables for installation in indoor residential cabling systems characterized up to 1 200 MHz.
