Understanding Motor Controls
Understanding Motor Controls
4th Edition
ISBN: 9781337798686
Author: Stephen L. Herman
Publisher: Delmar Cengage Learning
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Textbook Question
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Chapter 21, Problem 1RQ

Refer to Figure 21–1 to answer the following questions.

When switch HOA SW 122 is in the off position, which contacts have connection between them?

Expert Solution & Answer
Check Mark
To determine

The contacts that have connection between them when switch HOA SW 122 is in OFF position.

Explanation of Solution

Refer the text book Figure 21-1.

Refer the table given in Figure 21 – 1 for the HOA SW 122 switch. The ‘X’ in the table represent a connection and the ‘O’ represent no connection between the contacts.

HOA SW 122
CONTACTHANDOFFAUTO
1 – 2OXX
3 – 4XOO
5 – 6XXO
7 – 8OOX

From the table, the contacts that have connection when the HOA SW 122 switch is in OFF position are 1 – 2 and 5 – 6.

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