Which of the following is not a basic requirement for a typical motor installation?

In the context of motor installation, a typical setup necessitates several fundamental elements to ensure optimal performance and longevity of the electric motor. Each of the provided choices represents a critical component of a successful motor installation.

Proper mounting is essential as it provides the necessary physical stability for the motor. A securely mounted motor can operate efficiently, minimizing vibrations that could lead to mechanical failures.

Correct voltage supply is equally important because motors are designed to operate at specific voltage levels. An incorrect voltage can lead to poor performance, overheating, or even permanent damage to the motor.

Appropriate ventilation is also crucial. Motors generate heat during operation, and inadequate ventilation can result in overheating, which may reduce the motor's efficiency and lifespan.

Given that all three options are fundamental requirements for a successful installation, the assertion that "all of the above" is not a requirement is the correct choice. This highlights the importance of recognizing that proper mounting, correct voltage supply, and appropriate ventilation are all necessary for safe and effective motor operation.