What type of protective device would you find at the beginning of a distribution line?

A fused cutout switch is an essential protective device used at the beginning of a distribution line. It is designed to protect the line from faults such as short circuits. When a fault occurs, the fuse within the cutout will blow, disconnecting the line and preventing damage to equipment and ensuring safety. This device allows for the safe isolation of the line for maintenance purposes while also enabling quick restoration of service when the fault has been cleared and repairs are completed.

In contrast, other options may serve different roles in electrical systems. A surge protector primarily protects equipment from voltage spikes but does not play a role in circuit isolation during faults. A power inverter converts direct current into alternating current, which is not applicable for protecting distribution lines. A circuit breaker does provide protection and isolation but is often used downstream or in more complex setups rather than at the very start of a distribution line. Therefore, the fused cutout switch's specific purpose and functionality make it the correct choice for this context.