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Cable

The document outlines the technical specifications for trench work related to stormwater and subsoil drainage systems, detailing the responsibilities of the Contractor in excavation, backfilling, and installation of cable infrastructure. It specifies requirements for cable pulling pits, conduits, and the proper layering and marking of cables during installation. Additionally, it mandates the submission of cable tray designs for Engineer approval, ensuring compliance with regulatory standards.

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Abdul Latheef
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32 views1 page

Cable

The document outlines the technical specifications for trench work related to stormwater and subsoil drainage systems, detailing the responsibilities of the Contractor in excavation, backfilling, and installation of cable infrastructure. It specifies requirements for cable pulling pits, conduits, and the proper layering and marking of cables during installation. Additionally, it mandates the submission of cable tray designs for Engineer approval, ensuring compliance with regulatory standards.

Uploaded by

Abdul Latheef
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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STORMWATER & SUBSOIL DRAINAGE SYSTEMS VOLUME IV- TECHNICAL SPECIFICATIONS

1.3.31.9 Trench Work


A. The excavation and backfilling of cable trench work shall be carried out by the
Contractor and he shall be responsible for ensuring that all trench work is adequate
for his needs. The Contractor shall supply and lay the sand bedding, cables, sand
blinding, cable cover tiles and marker tape.

B. Cable pulling pits shall be foreseen at change of cable direction and at distances of
not exceeding 20 m. Cables crossing in paved areas shall be laid in conduits, PVC-
u pipes DN ≥ 150 mm, encased in concrete. with 2 spare conduits are to be foreseen
at each crossing. Pulling pits shall be precast concrete with watertight cast iron
covers. Markings on covers shall be "ATTENTION ELECTRIC CABLES". Coating
of covers shall be as specified for manhole covers.

C. Before laying cable, cable trenches shall be backfilled with a 100 mm thick layer of
clean sand and compacted. Cables shall be snaked to avoid tension during
backfilling. After cables are laid, checked and tested, the trench shall be backfilled
with a 100 mm thick layer of sand, measured from the top of the largest cable and
compacted. Cable tiles, manufactured from concrete B25, or from plastic as
approved by the Engineer and ADDC, shall then be placed on top of the sand and
the remainder of the trench backfilled as specified under civil works. The warning
tape mentioning “600 / 1000 volts electrical cables” shall be placed 30 cm from the
final ground level. Backfilling works shall only commence after the Engineer has
inspected the cables and has given his written approval for back fill.

D. Where in accordance with the regulations of the Water and Electricity Authority
cable-route-markers are required, the Contractor shall carry out such work. The
dimensions, labelling and construction of cable - route -markers shall be as required
by the ADDC.

1.3.31.10 Cable Trays

A. The Contractor shall supply and install all cable trays. The drawings to be submitted
by the Contractor for the Engineer's approval shall include separate cable tray
drawings showing the their routing, design and method of installation.

PAGE 239

DIVISION 15 - SECTION 15000 THIRD EDITION - April 2022

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