Page 367 - IRSEM_Main Book

(i) In case of Tunnel, provision of cable duct should form part of the Tunnel
design.

(j) Provision of suitable duct/pipe/other arrangements shall be incorporated in
the bridge design itself for laying of cables on bridges.

15.1.3 Storage and Transportation of Cable

(a) Cable drums shall not be stacked on flat side. Suitable stoppers shall be
placed for stability.

(b) Cable drums shall have access for lifting and moving.

(c) When rolling the cable drum either for unloading or transportation, the drum
shall always be rotated in the direction of the ‘arrow’ which is marked on the
drum.

(d) The drums shall not be rolled over objects that could cause damage to the
protective battens of the cable.

(e) When unloading is carried out from the vehicle, the drum shall not be
dropped on the ground directly to avoid damage due to impact. Fork lifter or
ramp shall be used.

(f) During all stages of storage, it is essential that the ends of the cable are
effectively sealed by end cap or in any other approved manner to avoid
water entry into the cable.

(g) It is desirable that cable drums are stored in covered shed to protect
against direct exposure to sun.

Section 2: Paying Out, Trenching & Laying of Cables

15.2.1 Paying Out and Testing of Cable

(a) For paying out cables, the cable drums shall be mounted on cable wheels.
It should be ensured that no kink is formed while paying out the cable.

(b) The drum on the wheel shall be brought to one end of the trench, the end of
the cable freed and the cable shall be laid along the trench.

(c) A party of labourers shall move along the trench carrying cable at suitable
intervals so that cable is not damaged due to dragging along the ground or
bent unduly.

(d) Before the cable is laid in the trench, a visual inspection of cable shall be
made to see that there is no damage to the cable. It shall be tested for
insulation and continuity of the cores. Thereafter the cable shall be laid in
the trench. Record of insulation and loop resistance must be maintained.

(e) In cases where the wheels are not available, the drum shall be mounted on
an axle at one end of the trench and cable paid out and carried by
labourers.

(f) In no case, shall the drum be rolled off on to the road for laying the cable
and the cable dragged on the ground for laying purposes.

Chapter 15: Cables Page 315 of 535