Chapter 11
Motor nameplates shall include the rated horsepower if ___ HP or more.
1/8
The length of flexible cords used to supply A/C units shall not exceed ___' for 120 V units.
10'
The disconnecting means for motor circuits are required to have an ampere rating of at least ___% of the FLC rating of the motor for circuits rated 1000 V or less.
115%
The code letter or locked rotor amps shall be listed on the nameplates of motors rated ___ HP or more.
12
Branch circuit conductors supplying a single motor shall have an ampacity of ___% of the FLC rating as indicated on the appropriate FLC table.
125%
Cord and plug connected compressors and equipment shall be rated no greater than ___ A on 120 V circuits.
20
Table ___ is used to determine the current rating of 3 phase AC motors.
430.250
Equipment shall be located within ___' and be visible to be considered within sight.
50'
The branch circuit conductors on the line side of the controller for a multi speed motor shall be at ___% of the highest of the FLC rating shown on the motor nameplate.
90%
A ___ is an assembly of one or more enclosed sections with a common power bus and primarily containing motor control units. A. Switch . B. Motor branch circuit . C. Motor control center . D. Generator
C. Motor control center
The ___ is the device in a motor circuit which turns the motor ON and OFF.
Controller
A plug and receptacle may serve as a controller for stationary motors up to 2 HP.
False
Small motors rated 150 W or less shall be marked "impedance protected"
False
A(n) ___ refrigerant motor compressor is a combination compressor and motor enclosed in the same housing, having no external shaft or shaft seals, with the motor operating in the refrigerant.
Hermetic
The ___ branch circuit is the point from the last fuse or circuit breaker protecting the motor circuit out to the motor.
Motor
A/C and refrigeration equipment with several motors can be considered as a single machine.
True
The larger a motors full load table current, the less the percentage of the increase in sizing the thermal protector that is an integral part of the motor.
True
The overcurrent protection for an MCC may be located ahead or within the MCC.
True
The rated frequency shall be given on the nameplate of a motor controller.
True
The winding type shall be given on the nameplate of a DC motor.
True
The ampere rating of a fusible disconnect is determined by the size of fuse being used in the motor branch circuit.
False
A/C units that operate at ___ or less may be cord and plug connected.
150 V single phase
If the service factor and temperature rise are not marked on the nameplate, the nameplate current should be multiplied by ___%.
25%
A(n) ___ device is a pilot light, buzzer, horn, or other type of alarm.
Indicating
A(n) ___ is the operation of equipment in excess of normal, full load current rating, or a conductor subject to a current in excess of the rated ampacity.
Overload
