Stay Wires
Stay Wires are galvanized steel wire strands that are used for sustaining the mechanical load. Generally, they are made up of 6 wires stranded around 1 wire, twisting 7 wires together. Stay wire is used in Electricity Distribution industry mainly for balancing of load on the electric pole. When the electrical line is straight, the load on the pole is vertically downward. However, at the junction point, or if there is a turn in the electric line, there is also a horizontal component of load on the pole. In the long run, due to this continuous load, a pole may bend or the line may bend. Stay is provided to balance the horizontal component of the load on the pole mainly.

Earth Wires
An Earth wire is a wire that goes into the ground to disperse with electricity that excess electricity goes through to prevent a circuit from frying itself. These are very commonly used for dispersing lightning that hits an electrical wire and put it back into the ground where the electricity disperses and is no longer harmful to electronics or people.

Cores Wires
A wire having a steel core, often used for antennas. Core wires are generally used in ACSR Conductors.

Ground Wires for Transmission Lines – Commonly used size

Galvanised Steel Wires

Description Unit 7 / 3.15 7 / 3.66 7 / 4.06
1 Nominal Area sq.mm 55 75 90
2 Sectional Area
AAAC
Steel
Total

sq.mm
sq.mm
sq.mm


54.55
54.55


73.65
73.65


90.62
90.62
3 Overall Diameter mm 9.45 10.98 12.18
4 Approx. Mass kg/km 428 575 706
5 Rated Strength KN
kgf
56
5710
79.77
8134
980.16
10010
6 Modulus of Elasticity kg/sq.cm 1.933 x 10^6 1.933 x 10^6 1.933 x 10^6
7 Coefficient of Uner Expansion Per deg.C 11.5 x 10^6 11.5 x 10^6 11.5 x 10^6
8 Electrical Resistance at 200 C Ohms/km 3.375 2.500 2.0318
9 Tension / Sag
Span (m) Temp (°C)
T (Kgf) S (m) T (Kgf) S (m) T (Kgf) S (m)
260 32
53
1142
1007
3.17
3.59
1627
1430
2.99
3.40
2002
1760
2.98
3.39
275 32
53
1142
1013
3.54
3.99
1627
1439
3.34
3.78
2002
1770
3.33
3.77
320 32
53
1142
1031
4.80
5.31
1627
1463
4.52
5.03
2002
1800
4.51
5.02
350 32
53
1142
1041
5.74
6.30
1627
1477
5.41
5.96
2002
1817
5.40
5.95
380 32
53
1142
1050
6.76
7.36
1627
1490
6.38
6.97
2002
1833
6.37
6.95
400 32
53
1142
1056
7.50
8.11
1627
1497
7.07
7.68
2002
1842
7.05
7.67