Section 76(2) in The Indian Electricity Rules, 1956

[Cites 0, Cited by 0] [Section 76] [Entire Act]

Union of India - Subsection

Section 76(2) in The Indian Electricity Rules, 1956

(2)Overhead lines not covered in sub-rule (1) shall have the following minimum factors of safety:-

(i)	for metal supports	1.5;
(ii)	for mechanically processed concrete supports	2.0;
(iii)	for hand-moulded concrete supports	2.5;
(iv)	For wood supports	3.0.

Explanation 1.-The minimum factors of safety shall be based on such load as may cause failure of the supports to perform its function (assuming that the foundation and other components of the structure are intact).Explanation 2.-The load shall be equivalent to the yield point stress or the modulus or rupture, as the case may be, for supports subject to bending and vertical loads and the crippling load for support used as struts.Explanation 3.-The strength of the supports of the overhead lines in the direction of the line shall not be less than one-fourth of the strength required in the direction transverse to the line.Explanation 4.-The minimum factor of safety for the stay wires, guard wires or bearer wires shall be 2.5 based on the ultimate tensile strength of the wire.Explanation 5.-The minimum factor of safety for conductors shall be 2 based on their ultimate tensile strength. In addition, the conductor tension at 320C, without external load shall not exceed the following percentages of the ultimate tensile strength of the conductor:

Initial unloaded tension	35 per cent
Final unloaded tension	25 per cent

Provided that the conductors having a cross-section of a generally triangular shape, such as conductors composed of 3-wires the final unloaded tension at 320C, shall not exceed 30 per cent of the ultimate tensile strength of such conductor.

Legal Document View

Unlock Advanced Research with PRISMAI

Union of India - Subsection

Section 76(2) in The Indian Electricity Rules, 1956