True or False: Overload relays have many classifications; a few examples are Thermal, Magnetic, energy-saving, normally open (NO) relays, normally closed (NC) relays.

• A. True
• B. False
• C. Not sure
• D. Cannot be determined

Answer: (B)

Overload relays are classified by how they sense and trip to protect motors, not by contact configuration. The common classifications are thermal (bimetal-based) relays, magnetic relays, and electronic/solid-state overloads, which describe the mechanism that detects overload and initiates the trip. Terms like normally open and normally closed describe the state of the relay’s output contacts, not the overload protection method itself. Energy-saving is not a standard, primary classification for overload relays; it may describe a feature in some devices but isn’t a fundamental category of overload protection. Therefore, the statement is not accurate.