VRIOGS 010.7 RevA - Public Transport Victoria

42 VRIOGS 010.7 Revision A10.2.1 Labelling1. All track wires, impedance bond connections are to be labelled with astainless steel or similar robust labels suitably permanently stamped orengraved with the cable designation as identified on the Bonding Plan,example. 123T. RB. Steel labels are to be fixed to the cables with black heavyduty cable ties as close as possible to the point of connection to the rail orconnection at the impedance bond.10.2.2 Connections1. The method of connection of all track circuit leads to rails shall be by anapproved bolted rail type connections fastened to the rail in accordance to thisspecification.2. All holes drilled into the centre of the rail web for the purpose of connection oftrack cabling shall to be placed as close as is practical to the insulated railjoint (IRJ). This is dependant on rail size and the type of insulated rail jointassembly; and nominally 800mm from the actual separation point of theinsulated rail joint assembly is the location for the closest hole, with all othernecessary holes drilled from that point and at a minimum of 125mm apart andmaximum 250mm, so as not to interfere with the integrity of the rail.3. All rail connections or bonds between rails and equipment shall be madeutilising a Infrastructure Manager’s approved; bolted type connector:• 6mm diameter for all cable connections of 4 mm 2 , 10 mm 2 and 16 mm 2 .• 12mm diameter for all cable connections of 25 mm 2 to 400 mm 2 .4. All crimp links and lugs shall be appropriate to the application, example.Aluminium on aluminium cables, copper on copper cables and bi-metallic forjoining aluminium to copper.5. All jointing and connection of lugs is to be completed by crimp devices thatuse the compression method of crimping and not the indent method.10.3 Length of Track Leads1. Where AC, DC, Westrack and Jeumont Schneider type track circuits areinstalled, consideration should be given to not exceeding maximum tracklead resistance values.2. Where long length track leads are encountered the size cable should becarefully selected to cater to the track circuit characteristics andmanufacturer’s recommendations.NOTE: This document is controlled only when viewed on the DOT Engineering Standards website.Any other copy of this document is uncontrolled, and the content may not be current.