VRIOGS 012.2.1 - Public Transport Victoria

32 VRIOGS 012.2.1 REVISION A
9.8 Transition between Cable Ladder/Cable Ladder/GST/GLT/Buried
Route
a) The transition between different cable ladder sizes shall be made using purpose
built adaptors from the ladder manufacturer’s product range
b) The transition between cable ladder and GST, GLT, pits or buried route including
ULX and URX shall be made using purpose built adaptors fabricated from the same
material as the cable ladder.
c) The adaptor for ULX and URX shall be of sufficient size to accommodate all
conduits from the ULX or URX, including spare conduits and shall extend from the
cable route to within 300 mm of ground level.
d) The void between the adaptor and the conduits shall be sealed.
e) Modifications to the cable ladder to accommodate the adaptor shall not result in
cables in the cable ladder being unsupported over lengths exceeding 600 mm.
9.9 Cable Ladder Arrangements at Connection to Local Cable Route
and Equipment
a) The connection of the main cable ladder route to local cable route and equipment
shall be made using purpose built tee pieces from the ladder manufacturer’s product
range.
9.10 Cable Ladder Covers
a) Cable ladder covers are only required where the bottom of the cable ladder is less
than 2.4 m above the adjacent rail level unless otherwise specified.
b) Covers shall not be fitted until the cables have been inspected and approved.
c) Cable ladder covers shall overlap the adjacent covers by a minimum of 20 mm
(away from the direction of normal train movements) and shall be secured with
stainless steel straps, one 100 mm from each end of each lid plus additional straps
as required to ensure a maximum of 600 mm intervals between straps for 600 mm
wide ladder and a maximum of 800 mm intervals between straps for other ladder
widths.
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 be inaccurate.