In this interactive learning object, the learner practices sizing a tank-type water heater for one- and two-family residences, townhouses, and apartments with individual water heaters.

Learners use the National Electrical Code to determine the size of a motor overload protection device.

The learner will understand the operation of motor control circuits used to start and stop three-phase motors.

Learners examine the ways in which a motor starter circuit is protected by a main circuit breaker and overload heaters when there is excessive current.

Learners examine devices that are used to protect a motor from damage, such as fuses, overload heaters, and thermal protectors. A quiz completes the activity.

In this interactive object, learners identify the symptoms of fluid volume excess and fluid volume deficit.