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Green and yellow sleeving is sold separately, to be applied at the ends. The cross section on the main conductors is given first, and then the cross-section of the CPC. Standard UK metric twin and earth cable sizes. 1/1 mm 2 and 1.5/1 mm 2 have solid conductors and CPC (primarily used on low power lighting or alarm circuits)
The use of shielded cables in security systems provides some protection from power frequency and radio frequency interference, reducing the number of false alarms being generated. The best practice is to keep data or signal cables physically separated by at least 3 inches (75mm) from 'heavy' power circuits which are in parallel.
The cables are assembled and clamped together on a special workbench, or onto a pin board (assembly board), according to the design specification, to form the cable harness. After fitting any protective sleeves, conduit, or extruded yarn, the harness is either fitted directly in the vehicle or shipped. [3]
Cross-section through a coaxial cable showing shielding and other layers. One example is a shielded cable, which has electromagnetic shielding in the form of a wire mesh surrounding an inner core conductor. The shielding impedes the escape of any signal from the core conductor, and also prevents signals from being added to the core conductor.
A ferrite bead with its plastic shell removed. Ferrite beads prevent electromagnetic interference (EMI) in two directions: from a device or to a device. [1] A conductive cable acts as an antenna – if the device produces radio-frequency energy, this can be transmitted through the cable, which acts as an unintentional radiator.
This type of protective bushing is quite common in applications that range from telecom switches and data center cabinets to complex and dense wire/cable and even hydraulic tubing in aircraft, transportation vehicles and medical equipment.
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