Exam 19: Special-Purpose Outletswater Pump, Water Heater

Submersible pump cable supplied with well pump assemblies ____ also suitable for direct burial.

NEC 430.103 requires that a disconnecting means for a motor shall ____ ungrounded conductors.

The overload protection for a motor might be thermal overloads (sometimes called ____________________) in the controller, electronic sensing overload devices, built-in thermal protection, or time-delay fuses.

Article 430 contains requirements for motor installations. The section that requires a motor disconnect to be within sight of the motor or capable of being locked is ____________________.

Briefly explain what is meant by the electric utility program known by all of the following names: "time of day," "time of use," and "off-peak."

Where the values of branch-circuit protection required for motors according to Table 430.52 do not correspond to standard ratings as listed in NEC 240.6, the next ____ rating is permitted to be used.

Most installations require motor overload protection not to exceed ____________________ of the motor's full-load current rating.

Should it be required to run a pump's circuit underground for any distance, it is necessary to install Type UF or Type USE cable or ____, and then make up the necessary splices in a listed weatherproof junction box

Explain why heating elements in water heaters are frequently rated 250 volts for operation on 240-volt circuits.

UL requires that the power (wattage) input must not exceed ____ percent of the water heater's nameplate rating.

Because a water heater represents a continuous load, the branch circuit must be rated not less than ____ percent of the water heater nameplate rating.

An individual motor disconnect must be in sight of the motor controller and must disconnect the controller. The NEC definition of in sight means that the controller must be visible and not more than ____ from the disconnect.

A disconnect need not be in sight of motor and driven machinery if the disconnect can be ____________________ in the open "OFF" position.

According to NEC 230.7, conductors other than service-entrance conductors are not permitted in the same raceway as the service-entrance conductors. However, what does Exception No. 2 permit?

Dual-voltage-rated pump motors are rated ____.

When a non-motor-operated electrical appliance is not marked with its overcurrent protective device rating, NEC 422.11(E) states that the branch circuit overcurrent protection shall be ____.

The Code requirements for standard resistance-type electric water heaters are found in Article 422. Because heat pump water heaters contain a hermetic refrigerant motor compressor, their Code requirements are found in Article ____________________.

Water pumps that contain all required starting and protection components and connect directly to the pressure switch with no above-ground controller, are often called ____________________ pumps.

The NEC permits overcurrent protective devices for individual branch circuits to appliances to be sized up to 150 percent of the appliance ampere rating. However, if the 150 percent sizing does not correspond to a standard size fuse or circuit-breaker, then what size is permitted?

If a 115/230-volt, dual-voltage motor has a full-load current of 8 amperes at 230 volts, the same motor connected for 115-volt operation will draw ____________________ amperes.