VRIOGS 012.2.1 - Public Transport Victoria

42 VRIOGS 012.2.1 REVISION A
shall be installed at points where there is a major change of direction greater than
25 degrees, or where services leave the main cable route.
c) The maximum length between adjacent pits shall be 300 metres and nominally 150
metres.
d) Where pits and cable turning chambers are installed on embankments, protection
against erosion around and adjacent to the pit and special drainage arrangements
shall be provided to ensure that there will be no undermining or deterioration of the
embankment during periods of heavy rain.
e) Where it is identified that a defined length of spare or slack cable is required for
either;
i. Future use
ii.
iii.
iv.
Additional Cable jointing purposes
Temporary works
Other identified purpose/s
14.8 Location of Cable Jointing Pits
a) Cable jointing pits shall be provided wherever:
i. Fibre optic cable and communications cable is to be jointed and a suitable
communications cable termination cabinet does not exist. All cables shall
enter from the longer ends of fibre optic and communications cable pits and
not from side entries.
ii.
Jointing of cabling near signals or signalling infrastructure is required
b) Consideration shall be given to the need to have vehicular access for the jointing of
cables and splicing of optical fibre cables, and as such cable jointing pits shall where
possible be positioned where road access is available.
14.9 Location of Cable Turning Chambers
a) Cable turning chambers shall be installed in GLT, GST and cable ladder routes
wherever cables are required to change direction sharply and either:
i. The minimum bend radius for the cable cannot be achieved within the GLT,
GST or cable ladder or,
ii.
The cable is likely to bear heavily against sharp edges at the bend.
14.10Preferred Type Cable Pits
a) Preferred type cable jointing pits and lids for rail signalling use are as within this
Standard and refer to drawings 112000 / 5 /14, drawings 112000 / 5 /15, drawings
112000 / 5 /16
b) The Infrastructure Manager’s type approved list should also be consulted for all
further types of approved pits and lids as acceptable for use.
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Any other copy of this document is uncontrolled, and the content may be inaccurate.