Which NEMA symbol represents the closed overload contacts in a motor starter?

The correct choice represents the NEMA symbol for closed overload contacts in a motor starter, which is crucial for understanding how motor starters operate in an electrical system. In a motor starter, closed overload contacts are used to protect the motor from running under overload conditions, which could lead to overheating and damage.

The NEMA designations are standardized symbols used in electrical diagrams to easily communicate the status of different contacts or devices. The symbol associated with closed overload contacts signifies that these contacts are engaged and that power is being provided safely with the overload protection in place. When overload conditions occur, these contacts will open to disconnect the power to the motor, preventing potential damage.

Understanding these symbols is essential for electricians and technicians to properly interpret schematics and to ensure safe and effective motor control. Recognizing the correct symbol for closed overload contacts helps in both troubleshooting and maintaining electrical equipment, ensuring compliance with safety standards.