Industrial Motor Control
Industrial Motor Control
7th Edition
ISBN: 9781133691808
Author: Stephen Herman
Publisher: Cengage Learning
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Chapter 2, Problem 1RQ
To determine

The name of the symbol from the given options.

Expert Solution & Answer
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Explanation of Solution

The symbol shown in Figure 1 is used in a schematic of control circuits to designate normally open contact.

Industrial Motor Control, Chapter 2, Problem 1RQ

Two parallel horizontal lines or vertical lines are used to indicate a normally open contact. The normally open contact in a circuit schematic depicts that the circuit is open and no current flow is present.

Thus, the correct answer is “option d. Normally open contact”.

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