6th Edition

ISBN: 9781305537125

Author: Herman

Publisher: YUZU

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Chapter 11, Problem 6PP

A 50-hp DC motor is connected to 250 volts. The motor does not contain a NEMA code. The motor is expected to operate for more than three hours at a time. The conductors are to be copper with type RHW-2 insulation. The motor is located in an area with an ambient temperature of 112°F . The two conductors are to be run in conduit. What size conductors should be used to connect this motor? (Note: 1 hp = 746 watts.)

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Chapter 11, Problem 5PP

Chapter 11, Problem 7PP

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Chapter 11 Solutions

EBK DELMAR'S STANDARD TEXTBOOK OF ELECT

Ch. 11 - What is the maximum temperature rating of Type...Ch. 11 - 2. Name two types of conductor insulation designed...Ch. 11 - A 10 AWG copper conductor with Type THW insulation...Ch. 11 - 4. Six 1/0 aluminum conductors are to be run in a...Ch. 11 - Name five conditions that must be met for running...Ch. 11 - What is the largest solid (nonstranded) conductor...Ch. 11 - Can Type TW cable be used in an area that has an...Ch. 11 - How is the grounded conductor in a flat...Ch. 11 - What three colors are ungrounded conductors not...Ch. 11 - Twenty-five 12 AWG copper conductors are run in...

Ch. 11 - A single-hase load is located 2800 ft from its...Ch. 11 - It is decided to use parallel 0000 conductors to...Ch. 11 - A three-phase motor operates on 480 V and is...Ch. 11 - You have been hired by a company to connect an...Ch. 11 - 2. You are a journeyman electrician in an...Ch. 11 - You are an electrician working in an industrial...Ch. 11 - Using the above example, determine the wire size...Ch. 11 - 1. A 2 AWG copper conductor is 450 ft long. What...Ch. 11 - 2. An 8 AWG conductor is 500 ft long and has a...Ch. 11 - 3. Three 500-kcmil copper conductors with Type RHH...Ch. 11 - 4. Eight 10 AWG aluminum conductors with Type THWN...Ch. 11 - 5. A three-phase motor is connected to 480 V and...Ch. 11 - 6. A 50-hp DC motor is connected to 250 volts. The...Ch. 11 - 7. A bank of electric heaters has a power rating...Ch. 11 - A 15-hp squirrel-cage induction motor is connected...Ch. 11 - Determine the resistance of a 16 AWG copper...Ch. 11 - Determine the ohms-per-mil-foot of an aluminum...

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