IS 2121 : Part 3 : 1992 Conductors and earthwire accessories for overhead power lines: Part 3 Accessories for earthwire

1 Scope

1.1 This standard covers the requirements for accessories forearthwire for use on overhead power lines and includes:

a) earthwire suspension clamp assembly,

b) earthwire tension clamp assembly,

c) flexible copper bond for earthwire, and

d) mid span compression joints for earthwire and repair sleeves.

1.2 Earthwire is a conductor which is earthed and which isnormally situated above the phase conductors. They are normallyused for transmission line voltages greater than or equal to 33 kV.

1.3 For the purpose of this Indian Standard the terms`accessory and `fitting have been interchangeably used.

2 References

IS 2108 :1977 Blackheart malleable iron castings

IS 2121 : Part 1 :1981 Conductors and earthwire accessories foroverhead power lines:Part 1 Armour rods, binding wires and tapes forconductors

IS 2121 : Part 2 :1981 Conductors and earthwire accessories foroverhead power lines:Part 2 Mid span joints and repair sleeves forconductors

IS 2500 : Part 1 :1973 Sampling inspection tables:Part 1 Inspection by attributes and by count ofdefects

IS 2629 :1985Recommended practice for hot-dip galvanizing oniron and steel

IS 2633 :1986Methods of testing uniformity of coating on zinccoated articles

IS 6745 :1972Methods for determination of weight of mass ofzinc coating on zinc coated iron and steelarticles

IS 9567 :1980Tin or tin-lead coated copper wire