How is a typical Selector Switch on a step regulator labeled?

A typical Selector Switch on a step regulator is labeled with terms that denote the operational modes of the device related to voltage regulation. The terms "RAISE," "OFF," "AUTO," and "LOWER" directly indicate the functions available to the operator.

"RAISE" indicates that the regulator is set to increase the voltage, while "LOWER" shows that it can decrease the voltage. The "AUTO" option signifies that the device can automatically adjust to keep the system balanced and functioning appropriately according to the conditions it detects. The "OFF" setting allows the operator to disengage the regulation function when it’s not needed.

This labeling is practical for linemen and technicians, as it succinctly communicates the switch’s operational states, enabling quick understanding and response during maintenance or operational adjustments. The other options may contain some relevant terms but do not provide the specific operational clarity associated with typical step regulators and their functions in the electrical distribution system.