1. A 10-HP single-phase motor is connected to 240 volts. The motor nameplate indicates a NEMA Code B, a full-load running current of 47.5 amperes, and a temperature rise of 40°C. What size copper conductors with THWN insulation should be used to connect this motor?

1. A 10-HP single-phase motor is connected to 240 volts. The motor nameplate indicates a NEMA Code B, a full-load running current of 47.5 amperes, and a temperature rise of 40°C. What size copper conductors with THWN insulation should be used to connect this motor?

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter34: Motor Installation

Section: Chapter Questions

Problem 9RQ

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Expert Solution

Step 1

Given

motor rating : 10 HP

Voltage=230 V

NEMA -B

Full load current =47.5 A

temperature rise : 40⁰C

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