General Information on Track Circuits - RGS Online

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Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page E18 of 52 Withdrawn Document Uncontrolled When Printed Figure E13 Figure E14 <strong>General</strong> <strong>Information</strong> on Track Circuits Rail 2 Duplicate Track Cable Tail Cable E 18 R A I L T R A C K Rail 2 Lead To Lineside Apparatus Housing Rail 1 Lead Rail 1 Duplicate Track Cable
<strong>General</strong> <strong>Information</strong> on Track Circuits 10 Arrangement of Track Lead Rail Connections (Except Jointless) A B Dis Box C D Withdrawn Document Uncontrolled When Printed Railway Group Approved Code of Practice GK/RC0752 Issue Two Date December 1998 Page E19 of 52 Figure E15 and Figure E16 show typical arrangements of rail connections either side of an insulated joint. Figure E15 uses 90mm diameter orange pipe and is the preferred arrangement, except where the pipe is unable to be threaded under the rail, (eg. tunnels and other areas of restricted use). Figure E16 shows the alternative method where the cables are clipped to the top of the sleepers. In both cases, duplicated single core 2.5mm²(f) flexible cable, fitted with moulded rubber connectors, is the preferred arrangement to be used between the disconnection box and the rail. It is terminated on the four foot side of the rail. Under no circumstances should the track leads of different track circuits share a common rail connection. Note Combining two track circuits into one 4 core cable is not permitted. If required, in order to avoid vandalism, the disconnection box can be replaced by a heat–shrink jointing kit. Track lead arrangements for jointless track circuits are described in the relevant section dealing with the particular design. IRJ Traction Return Bond w Y R A I L T R A C K E 19 IRJ On non-electrified lines the first bay to be left clear Cable Route X Dis Box Note Dis Boxes should be mounted in a permanent Green Zone as defined in GO/RT3073. Figure E15 Z
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