Question 11.13: A single-phase motor is located 250 ft from its power source...

Delmar’s Standard Textbook of Electricity

A single-phase motor is located 250 ft from its power source. The conductors supplying power to the motor are 10 AWG copper. The motor has a full-load current draw of 24 A. What is the voltage drop across the conductors when the motor is in operation?

The "Step-by-Step Explanation" refers to a detailed and sequential breakdown of the solution or reasoning behind the answer. This comprehensive explanation walks through each step of the answer, offering you clarity and understanding.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.

The blue check mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

This Question has been Answered.

Already have an account?

Related Answered Questions

Question: 11.8

An electric annealing oven is located in an area with an ambient temperature of 125°F. The oven contains a 50-kW electric heating element and is connected to 480 volts. The conductors are to be copper with type THHN insulation. The termination temperature is not known. The furnace is expected to ...

Verified Answer:

Determine the amount of current needed to operate ...

Question: 11.7

Assume that a bank of heating resistors is rated at 28 kW and is connected to 240 V. The resistors operate for more than three hours at a time and are located in an area with an ambient temperature of 86ºF. Aluminum conductors with Type THWN-2 insulation are to be used to connect the heaters. What ...

Verified Answer:

Determine the amperage of the load using Ohm’s law...

Question: 11.12

The next problem concerns conductors used in a three-phase system. Assume that a motor is located 2500 ft from its power source and operates on 560 V. When the motor starts, it has a current draw of 168 A. The voltage drop at the motor terminals cannot be permitted to be greater than 5% of the ...

Verified Answer:

The solution to this problem is very similar to th...

Question: 11.9

Find the resistance of a piece of 6 AWG copper wire 550 ft long. Assume a temperature of 20ºC. The formula to be used is R = K × L/CM ...

Verified Answer:

The value for K can be found in the table in Figur...

Question: 11.6

Assume that a motor with a full-load current rating of 28 A is to be connected with copper conductors that have Type THW insulation. The motor is located in an area with an ambient temperature of 30ºC. The motor is not marked with NEMA code letters, and the termination temperature is not known. ...

Verified Answer:

Because a motor load is continuous, multiply the f...

Question: 11.5

Twelve 14 AWG copper conductors with Type RHW insulation are to be run in a conduit. The conduit is used in an area that has an ambient temperature of 110ºF. What is the maximum ampacity of these conductors? ...

Verified Answer:

Find the ampacity of a 14 AWG copper conductor wit...

Question: 11.11

A manufacturing plant has a cooling pond located 4000 ft from the plant. Six pumps are used to circulate water between the pond and the plant. In cold weather, however, the pumps can freeze and fail to supply water. The plant owner decides to connect electric-resistance heaters to each pump to ...

Verified Answer:

The first step in the solution of this problem is ...

Question: 11.10

An aluminum wire 2250 ft long cannot have a resistance greater than 0.2 Ω. What size aluminum wire must be used? ...

Verified Answer:

To find the size of wire, use

CM = \frac{K ...

Question: 11.14

A three-phase motor is located 175 ft from its source of power. The conductors supplying power to the motor are 1/0 AWG aluminum. The motor has a full-load current draw of 88 A. What is the voltage drop across the conductors when the motor is operating at full load? ...

Verified Answer:

E_{D} = \frac{1.732 \times 17 \Omega-CM/...

Question: 11.15

Determine the ohms-per-mil foot at 75°C for a copper conductor? ...

Verified Answer:

Use the formula

R = R_{ref}[1 + \alpha (T...