If the overcurrent protective device is not on a generator supplying a separate building, is the feeder on the line side?

The correct answer is that the feeder is on the line side. In electrical terminology, the line side refers to the portion of the electrical system that is upstream from a protective device, such as an overcurrent protective device. In scenarios where a generator is supplying power to a separate building, and there is no overcurrent protective device installed on the generator, the feeder connected to the generator is considered to be on the line side.

This is because the feeder is receiving power directly from the generator without passing through any protection that would normally define the load side. Whenever there is no overcurrent protective device affecting the feeder, the feeder remains connected to the source of power—in this case, the generator—placing it on the line side of the system.

The other answers may introduce confusion about interpretation. Saying it is on the load side implies that the feeder is downstream of some form of protection, which is not the case without an overcurrent protective device. Similarly, options suggesting ambiguity or dependence on the connection do not hold because the absence of the protective device clearly defines the position of the feeder in relation to the generator.