A DC motor that draws 7.2A is located 85 feet from its 240VDC source. The copper conductors supplying the motor operate at 68°F. Voltage drop on the conductors must be limited to 2% for the motor to properly operate. What size, in circular mils, copper conductors are required for this installation?

A DC motor that draws 7.2A is located 85 feet from its 240VDC source. The copper conductors supplying the motor operate at 68°F. Voltage drop on the conductors must be limited to 2% for the motor to properly operate. What size, in circular mils, copper conductors are required for this installation?

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 17R: a. If both elements of the water heater in this residence are energized at the same time, how much...

See similar textbooks

Similar questions

8. If the system bonding jumper in a DC system is a screw, what color must the screw be? A. WhiteB. RedC. Orange D. Green
Considering the termination temperature ratings of the equipment used in residential wiring, discuss why electricians usually determine conductor ampacity based on the 60°C column of Table 310.15(B)(16
How is the grounded dc conductor of a photovoltaic system required to be identified? a. shall be identified at the time of installation by distintive red markings on some of the terminations b. shall be identified at the time of installation by distintive blue marking at all terminations c. shall be identified at the time of installation by a distintive grouping of wires AWG #2 d. shall be identified at the time of installation by distinctive white marking at all terminations.
A load is located 100 ft from a 230V power supply and is wired with 4 AWG aluminum conductors. What size copper conductors can be used to replace the aluminum conductors and not increase the conductor voltage drop?
14. During normal operation of a typical 120-volt appliance circuit, current flows through the hot, grounding, and neutral conductors.
All answers should be written in complete sentences. Calculations should be shown in detail, and Codereferences should be cited when appropriate. Unless otherwise stated, all conductors are copper type THHN, and the supply is AC. 1. What are the minimum allowable ampacities of the phase conductors and the neutralconductor that are to supply a 2-phase, 3-wire, 230-volt, 30-horsepower motor?
460VAC squirrel cage, 60 hp, 3 phase induction-type AC motor, is to be controlled with 220VAC rated magnetic contactor. Control circuit will be supplied with 110VAC. What is the full-load current and the conductor size.
What precautions must be utilized and maintained when setting up or using a Delata 4 wire system that is to serve both 240 V and 120 V single phase loads?
Eighty 16 AWG copper conductors with type THWN-2 insulation are to be run in a conduit. The conduit used in an area that has an ambient temperature of 120 F. What is the maximum ampacity of these conductors?
a. If both elements of the water heater in this residence are energized at the same time, how much current will they draw? (Assume the elements are rated at 240 volts.) b. What size and Type THHN wire is required for the load of both elements? Show calculations.
Find the maximum distance between outlets when using #10 Cu THWN copper wire at 240V on a 20A single phase load w/o exceeding a 3 percent voltage drop. What is considered the maximum. permissible drop for feeders and branch circuits per the NEC recommendation?
Electric Powers System for Nonelectrical Professional can you describe effective preventive maintenance programs used for substation equipment