Control Devices 469
as fluorescent lamps, TV receivers, induction motors, and other transform-
er-operated devices.
SCR and triac control can be used effectively to control resistive loads
such as incandescent lamps, soldering irons or pencils, heating devices
and electric blankets. It is also safe to use this type of control for univer-
sal motors. This type of motor is commonly used in portable power tools
and some small appliances such as portable drills, saws, sanders, electric
knives, and mixers. When in doubt about a particular device, check the
manufacturer’s instruction manual. It is also important that the wattage
rating of the load not exceed the wattage of the control device. Wattage
ratings are nearly always marked on the device.