
EBK 3N3-EBK: INDUSTRIAL MOTOR CONTROL
7th Edition
ISBN: 9780176919962
Author: Herman
Publisher: VST
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Chapter 2, Problem 1RQ
To determine
The name of the symbol from the given options.
Expert Solution & Answer

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