Which safeguard is considered an integral part of the machine?

The answer is built-in safeguard, which is considered an integral part of the machine because it is designed to be a permanent fixture that enhances safety during operation. Built-in safeguards are incorporated directly into the machinery's design and often work in conjunction with the machine's mechanics, ensuring that safety features are always in place when the machine is in operation.

This type of safeguard can include features such as the design of the machine components to minimize hazards or electronic safety interlocks that prevent the machine from operating under unsafe conditions. Unlike external measures or additional safety devices, built-in safeguards are fundamental to the machine's structure and function, which is why they are classified as integral.

In contrast, barrier guards, automatic devices, and fenced areas are added safety measures that can be used but are not inherently part of the machinery itself. While they may provide effective protection, they do not alter the machine's design or operational functions as built-in safeguards do. Thus, the distinction lies in the integration and permanence of the safeguard in relation to the machine’s overall structure.