Letter Se

Sensing Switch

A device, sometimes called a sensor, that turns on or off to
indicate presence or absence of an object or material. Examples
include limit switches and photoelectric , inductive, capacitive,
and sonar proximity switches.

Service Entrance

The place where power cables enter a building.



Service Factor
A numerical value that is multiplied by a motor’s rated
horsepower to determine the maximum horsepower at which
the motor should be operated.

Service Head
A device used to connect busway at the service entrance.


Service Section

The switchgear, switchboard, or power panelboard section
connected to incoming power.

Servo Drive
Usually refers to an electronic device used to control the speed
and torque of a servo motor as part of a closed-loop positioning
control system.