Page 548 - IRSEM_Main Book

(f) Earth Work: For excavation work adjacent to tracks, the following action is taken:-

(i) In D.C. traction areas, intimation should be given in writing sufficiently in
advance to the concerned Traction Distribution Officer to enable him to depute
the Traction Staff to be present in order to prevent possible damage in the
traction underground feeder cables which are always located near the running
lines.

(ii) In AC traction areas, intimation should be given to the concerned officers of the
Electrical General Services and also S&T Department, since all the S&T and
Electrical lines are cabled on account of Electrical Induction.

In all AC and D.C. traction areas, the Traction Department provides cable markers
showing location of cables. In addition, tiles and bricks protect the cables and
during excavation, if workmen come across such tiles or bricks in an arranged
manner, they should at once report the matter to the higher officials. Any further
excavation should be carried out only in the presence of the authorized staff of
Electrical Traction and or S&T Department as the case may be.

(g) The relative alignments of the centerline of the track with respect to the alignment of
the contact wire must be maintained within the specified tolerances. This applies to
both horizontal and vertical clearances. Slewing or lifting of track must not be done
outside the agreed maintenance limits unless the position of the contact wire is
altered at the same time. Adjustment of cant has a magnified effect on the horizontal
displacement of the centerline of the track with respect to the alignment of the
contact wire.

Horizontal clearances to structures within the limits laid down in the Schedule of
Dimensions must be maintained. For slewing or alterations to track involving
adjustment of contact wire (outside the agreed maintenance limits) sufficient notice
should be given to the traction staff so that that they arrange to adjust the overhead
equipment.

(h) Alterations to Track Bonding: All bonds removed by the staff of the Engineering
Department shall be replaced by the staff of the Engineering Department and all such
removals and replacements shall be reported to the Assistant Electrical Engineer,
Traction Distribution in charge, concerned without delay.

(j) Working of Cranes: No crane shall be worked except on the authorized 'permit-to-
work'. In every case of working of a crane, arrangement should be made for the
presence of authorised overhead equipment staff to ensure that all safety
precautions are taken.

(k) Inspection of Tunnels: For inspection of roofs and sides of a tunnel, the overhead
equipment shall be rendered 'dead'. Special insulated apparatus should be used if
sounding the unlined portions to locate loose rock in the roof and sides, is required to
be carried out, when the overhead equipment is 'live'.

(I) As far as possible closed wagons shall be used for material trains. In case open or
hopper wagons are used, loading and unloading of such wagons in electrified tracks
shall be done under the supervision of an Engineering official not below the rank of a
Permanent Way Mistry, who shall personally ensure that no tool or any part of body
of the worker comes within the' danger zone', i.e. within 2 meters of OHE.

Chapter 22: Requirements Of Signalling In 25 KV AC Electrified Area Page 491 of 535