Page 173 - IRSEM_Main Book

7.3.7 Miscellaneous Indication Boards

(a) An indication board shall be provided at the foot of Gate signal if it is
protecting more than one mid section LC gate with appropriate legend.

(b) An indication board shall be provided at the foot of the IB signal if it is
protecting mid section LC gate with legend "Look out for LC gate when
passing IB signal at ON".

(c) Any other indication boards as required.

Section 4: Points, Operation, Indicators & Isolation

7.4.1 The points shall be operated by Point machines (approved type). Points
leading to un-signalled lines or sidings may be manually operated with
suitable electrical controls.

7.4.2 Obstruction Test: Insertion of a 5 mm obstruction between the switch rail
and the stock rail of a Facing Point, at approximately 150 mm from the toe of
the switch shall prevent the Point from being locked and the relevant signal(s)
being taken 'OFF' for movements over them.

7.4.3 Crank Handles for Point Operation: where power operation of Point
Machine is not functional, provision for manual cranking shall be done
through interlocked crank handles.

7.4.4 Where required, provision may be made for emergency operation of points
during track circuit failures. Each such individual operation shall be recorded
on a suitable non-resettable Counter.

7.4.5 Point Indicators (For Non-Interlocked points)

(a) They shall be provided at all Points on running lines which are not
interlocked with Signals, unless the position of Points is otherwise proved.
Point Indicators shall be of the target type.

(b) Indications:

(i) When the points are set for the straight line, the indicator shall display
a white target by day and a white light by night, in each direction.

(ii) When the points are set for the diverging line, the indicator shall
display the edge of the disc by day and a green light by night, in each
direction.

(iii) At Points where a green light would give a misleading indication to a
Loco pilot, a red light may be permitted under special instructions.
Refer to Drg No: 12-D1

Chapter 7: Essentials of Signalling Page 142 of 535