Final answer:
The letters 'TE' on a motor's nameplate stand for 'Totally Enclosed,' signifying that the motor's internal components are protected from external contaminants such as dust and moisture, which contributes to a longer lifespan and reliable performance.
Step-by-step explanation:
If a motor has the letters TE on the nameplate, it typically stands for "Totally Enclosed". This indicates that the motor is designed in such a way that its internal parts are completely enclosed, protecting them from the external environment. This type of motor design is particularly beneficial in preventing the ingress of dust, moisture, and other contaminants that could potentially harm the motor's components. Totally enclosed motors are often used in environments where these conditions are prevalent, helping to ensure a longer lifespan and more reliable performance of the motor.