# Power System - Transmission and Distribution - Electrical Engineering (MCQ) questions and answers for Q. 17057

Q.  A 132 kV transmission line, with the weight of conductor = 680 kg/km, length of span = 260 m, ultimate strength = 3100 kg, safety factor =2. Calculate the height above ground at which the conductor should be supported. Ground clearance required is 10 m.
- Published on 23 Nov 15

a. 10.7 m
b. 13.7 m
c. 20.83 m
d. 18.75 m

#### Discussion

• sowmya   -Posted on 04 Feb 18
weight of th conductor=680/1000 =0.68 kg
working tension , T=ultimate strength / safety factor
=3100 / 2 =1550 kg
span length , l = 260 m
sag = wl^2 / 8T
=3.7 M
ground clearance = 10m
conductor should be supported at a height = 10 + 3.7 =13.7 m
• justice   -Posted on 13 Dec 17
Write your comment here...please i would like if get the breakdown of the calculation.The calculations steps that gave the result to be 13.7m
• justice   -Posted on 13 Dec 17
Write your comment here...please i would if get the breakdown of the calculation.
• Barnabas   -Posted on 17 Jul 17
Please I need a breadown on how you solved this calculation with formulars involved.
Than you.
• hein   -Posted on 05 Mar 16
I want to know it.

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