(1) Where guarding arrangement is required under these regulations, the following shall be observed, namely: –
(i) every guard wire shall be connected with the earth at each point at which its electrical continuity is broken;
(ii) every guard wire shall have an actual breaking strength of not less than 635 kgf and if made of iron or steel, shall be galvanised; and
(iii) every guard wire or cross-connected system of guard wires shall have sufficient current carrying capacity to ensure them rendering dead, without risk of fusing of the guard wire, till the contact of any live wire has been removed.
(2) In the case of a line crossing over a trolley wire, the guarding arrangement shall be subjected to the following conditions, namely: –
(i) where there is only one trolley-wire, two guard-wires shall be provided as illustrated in DIAGRAM-A;
(ii) where there are two trolley wires and the distance between them does not exceed forty centimetre, two guard-wires shall be provided as illustrated in DIAGRAM-B;
(iii) where there are two trolley wires and the distance between them exceeds forty centimetre but does not exceed 1.2 metre, three guard-wires shall be provided as illustrated in DIAGRAM-C;
(iv) where there are two trolley-wires and the distance between them exceeds 1.2 metre, each trolley-wire shall be separately guarded as illustrated in DIAGRAM-D;
130 THE GAZETTE OF INDIA : EXTRAORDINARY [PART III—SEC.4] DIAGRAM-A 20 cm 20 cm O O MIN 60 cm O ______________________________________________________________ DIAGRAM-B DIAGRAM-C 20 cm 20 cm 20 cm 20 cm O O O O O MIN MIN MIN MIN 60 cm 60 cm 60 cm 60 cm O Upto O O Over O 40 cm 40 cm and upto 120 cm _____________________________________________________________ DIAGRAM-D 20 cm 20 cm 20 Cms 20 cm O O O O 60 cm 60 cm O O Over 120 cm
(v) the rise of trolley boom shall be limited such that the trolley wire shall not foul the guard wires; and
(vi) where a telegraph-line is liable to fall or be blown down upon an arm, stay-wire or span-wire and so slide-down upon a trolley-wire, guard hooks shall be provided to prevent such sliding.