A single-phase 60-Hz power line is supported on a horizontal crossarm. The spacing between conductors is 8 ft. A telephone line is supported on a horizontal crossarm 6 ft below the power line. The conductors of the telephone line are AWG No. 14 solid copper (d = 1.6277 mm) spaced 2 ft between centers. The conductors of the power line are AWG No. 2 solid copper (d = 0.2576 in). Find the mutual inductance between the circuits and the voltage per mile induced in the telephone line if the current in the power line is 150 A.

A single-phase 60-Hz power line is supported on a horizontal crossarm. The spacing between conductors is 8 ft. A telephone line is supported on a horizontal crossarm 6 ft below the power line. The conductors of the telephone line are AWG No. 14 solid copper (d = 1.6277 mm) spaced 2 ft between centers. The conductors of the power line are AWG No. 2 solid copper (d = 0.2576 in). Find the mutual inductance between the circuits and the voltage per mile induced in the telephone line if the current in the power line is 150 A.

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter10: Using Wire Tables And Determining Conductor Sizes

Section: Chapter Questions

Problem 4PP: 4. Eight 10 AWG aluminum conductors with Type THWN insulation are installed in a single conduit....

See similar textbooks

Similar questions

Airframe Electrical System Question: Why should solid, round conductor wire be avoided in aircraft? (Source: FAA AC 43.13-1B/2B)
The towers of height 45 m and 80 m respectively support a transmission line conductor at water crossing. The horizontal distance between the towers if 500 m. The tension in the conductor is 1750 kg and the weight of the conductor is 1.65 kg/m. the bases of the towers are at the water level. Calculate: i. Sag at lower point ii. Sag at upper point iii. Clearance between lowest point of the conductor and water iv. Draw a suitable figure and mark the values of sag, clearance, span and height of the conductor
A transmission line has a span of 250 m between supports, the supports being at the same level. The conductor has a cross-sectional area of 1·29 cm2. The ultimate strength is 4220 kg/??2 and factor of safety is 2. The wind pressure is 40 kg/??2. Calculate the height of the conductor above ground level at which it should be supported if a minimum clearance of 7m is to be kept between the ground and the conducto
The following problems refer to grounding requirements. Give the source of yourresponses. 1. What is the minimum size copper grounding electrode conductor for a service withthree sets of parallel 350 kcmil conductors (three conductors per phase)?
An overhead line has span of 260m. The tension in the line is 1200kg while the conductor weighs 650 kg per 100 meters. Calculate the maximum SAG in the conductor. If the height of the tower is 13 meters, estimate the clearance of conductor to the ground. Draw a figure and mark values of sag, clearance, span, height of conductor etc.
Using NEC: What gauge of conductors is required to feed a 240 Volt single-phase air conditioning unit, whose compressor consumes 6000 VA and the condenser motor is 2 amps? Use copper THHN wire connected to 60°C terminals. What is the minimum and maximum allowable ampacity of the air short-circuit protection of the previous example?
The conductors of a 10 km long, single phase, two wire line are seperated by a distance of 1.5 m. The diameter of each conductor is 1 cm. If the conductors are of copper, the inductance of the circuit is ??
A 10 km long, transmission-line has two parallel conductors placed 2 metres apart. The diameter of each conductor is 1·4 cm. Calculate the DC resistance of 1 km length of the conductor [Resistivity of material = 2.83x10-8 Ω-m]
On the 1km long dc distributor above the applied voltage at point O is 200V. Lengths ??? = 100?,??? = 600? and the impedance for the conductor material per 10000m is ?? = 5 < 53.130Ω. Calculate:a. The potential at point C b. Current along section OC of the distributor
What is the ampacity of nine 10 AWG THHN current-carrying conductors installed in a single raceway that has an ambient temperature of 104°F, after the proper correction factors have been applied?
(b) A 3-phase, 50 Hz, 132 kV overhead line of length 150 km has conductors placed in ahorizontal plane. The diameter of the conductors is 20 mm and assume completetransposition arrangement is applied. (i) Analyse the charging current per phase when the conductors spacing are set at 4 m (ii) Investigate the range of conductor spacing that should be chosen in order to reducethe magnitude of the charging current per phase in Q2 (b)(i) by 5% or more.
A wind farm is being built on an island 6km offshore and needs to be connected to the power grid substation 12km down shore before it can become operational. The cost of laying cable under water is $10,000/km, and the cost of laying cable on land is $8,000/km. a) Determine the cable route that will minimize cost. b) What is the minimum cost