PEC - Random Questions 3

Where
a flexible cord is used to supply a room air conditioner,  the length of such cord shall not exceed
________mm for a nominal 120 volt
rating

Where
a flexible cord is used to supply a room air conditioner,  the length of such cord shall not exceed
________mm for a nominal 208- or 240
volt rating.

An
overcurrent protective device of adequate short circuit rating that will open simultaneously  all ungrounded conductors shall be applied in the grounding
autotransformer branch circuit and shall be rated or set at a current
not exceeding ________ percent of the
autotransformer continuous per phase current rating

An
overcurrent protective device of adequate short circuit rating that will open
simultaneously  all ungrounded conductors
shall be applied in the grounding autotransformer branch circuit and shall be
rated or set at a current not exceeding ________ percent of the continuous current rating of any series
connected devices in the autotransformerneutral connection

A
________ system that will cause the opening of the main switch or common
trip overcurrent device for the 3-phase,
4wire system shall be provided to guard against single phasing or internal
faults

If
the current-interrupting device is separate from the motor compressor and its
control circuit is operated by a protective device integral with the
motor-compressor, it shall be ________ so that the opening of the control
circuit will result in interruption of current to the motor-compressor

Motor-compressor’s
attachment plug and receptacle rating shall not exceed ________ amperes   at 125
volts

Motor-compressor’s
attachment plug and receptacle rating shall not exceed ________ amperes   at 250
volts

An
attachment plug and receptacle shall be permitted to serve as the ________ for
a single phase room air conditioner rated 250 volts or less if the manual
controls on the room air conditioner are readily accessible and  located within ________ mm of the floor

Branch
circuit conductors supplying a single motor-compressor shall have an
ampacity not less than ________ percent of either the motor-compressor
rated-load current or branch-circuit selection current, whichever is greater

A motor-compressor controller
shall have both a ________ full-load
current rating and a ________ current
rating not less than the nameplate rated-load current or branch-circuit
selection current, whichever is greater and locked-rotor current, respectively of the compressor

A
controller, serving more than one
motor-compressor or motor-compressor
and other loads , shall have a ________ full-load current rating and a locked-rotor current rating  not less than the ________

Conductors supplying one or more motor-compressorwith or without an additional loads shall have
an ampacity not less than the sum
of the rated load or ________
ratings whichever is larger of all the motors plus the ________ currents of the other motors plus ________ percent of the highest motor or
motor-compressor rating in the group

The
ampacity of the conductors supplying multi
motor and combination load
equipment shall not be less than the minimum circuit ampacity ________
on the equipment

For small
motor-compressor not having the locked-rotor current marked on the  nameplate or for small motor not
covered by tables 4.30.14.1,  
4.30.14.2,   4.30.14.3,   4.30.14.4,  
the locked-rotor current shall be assumed ________ times the rated-load current.

An air
conditioning or refrigerating system shall be considered to be
a  ________ under the provisions of
section 4.30.7.7

________  is the value in amperes to be used instead
of the rated load current in determining the ratings of the motor branchcircuit conductors, disconnecting mans,  controllers,
and branch circuit short-circuit  and ground
fault protective devicewherever the running overload protective device
permits a sustained currents greater than the specified percentage of the rated
load current

The
value of branch-circuit selection current 
willalways be ________ or
________ than the marked rated-load
current

The value of
branch-circuit selection current  willalways beEqual to  or  Greater than the marked ________ current

A
combination consisting of a compressor
and motor, both of which are enclosed
in the same housing, with no external shaft or shaft seals,
the motor operating on the refrigerant

Hermetic
Refrigerant motor-compressor is a combination consisting of a compressor and motor, both of which are enclosed in the same housing, with no
external shaft or shaft seals, the motor operating on the________

The
Rated-Load current for a Hermetic
Refrigerant motor-compressor is the current resulting when the motor-compressor
is operated at the rated ________ ; rated ________; and rated ________ of the
equipment it serves

The
frames of portable motors that operates at over 150 volts to ground shall be ________ or ________

Instruments
transformer secondaries and exposed non-current carrying metals
or other conductive parts or cases ofinstruments transformers, meters,
instruments, and relays shall be 
________

Controllers
enclosures shall be grounded regardless of  
________

Where
no rated-load current is shown on the equipment nameplate, the ________ current
shown on the compressor nameplate shall be used

EXCEPTION:     where so marked, the Branch-circuit Selection current shall be used instead
of  ________ current   in determining the highest rated  ( Largest ) motor- compressor

Dry-type transformers rated over ________ volts shall be installed in a vault
complying with part 4.50.3

Section 4.90.5
Electrode-Type Boiler. (Ground
Current Detection). Means shall provided for detection of the sum of the neutral and
ground currents and shall trip the circuit interrupting device if the sum of those currents exceeds the
greater of5 amperes or ________ percentof
the boiler  full load current for ________ seconds or exceeds an instantaneous value of 25percent
of the boiler full load current

Section 4.90.5
Electrode-Type Boiler. (Ground
Current Detection). Means shall provided for detection of the sum of the neutral and ground
currents and shall trip the circuit interrupting device if the sum of those currents exceeds the greater of         ________amperes or 7 ½ percentof the
boiler  full load current for 10 seconds
or exceeds an instantaneous value of ________ percent of the boiler full load
current

A separate overload
relay
protecting a single motor-compressor against overload and failure to start
shall be selected to trip at not more than ________ percent of the
motor-compressor rated-load current

The  ________ markings
of cord and plug connected equipment
rated not greater than 250 volts, single
phase, such as household refrigerators and freezers, Drinking
water cooler and beverage dispenser, shall be used in determining
the branch circuits requirements and each unit shall be considered as a  ________
unless the nameplate is marked otherwise

The
ampere rating of hermetic refrigerant motor-compressor’s disconnecting means shall be at least ________ percent of the
rated-load current or branch circuit selection current, whichever is greater

A  room air conditioner shall be considered as
a  ac appliance unit in determining its branch circuits and its rating is not more than ________ ampere and ________ volts

Where
live parts of motors or controllers operating at over 150 volts to ground
are GUARDED against accidental contact only by location as specified
in  section 4.30.12.2 and where
adjustments or other attendance maybe necessary during the operation of the
apparatus, suitable ________ or ________ shall be provided so that the
attendant cannot readily touchlive parts unless standing on the MATS or PLATFORMS

Ultimate trip current of overcurrent
(overload) relays or other motor protective devices used for the motor control
apparatus shall not exceed ________ percent of the controllers continuous
current rating

Where
the motor branch circuit disconnecting means is separate from the controller,  the disconnecting means current rating shall
not be less than the  ________ setting of
the overcurrent relays in the circuit

Flexible metal
conduit or
liquid tight Flexible metal conduitnot
exceeding  ________ mm in length shall be
permitted to be employed for raceway connection to a motor terminal
enclosure

(GENERAL) :       The disconnecting means  for motor circuits rated 600 volts, nominal
or less, shall have an ampere rating of at least   ________ percent of the full-load current
rating of the motor

GENERAL : ( Exception)     a
listed non-fused motor circuit switch having a horse power rating equal to or
greater than the motor horse power shall be permitted to have an ampere rating
less than ________ percent of the full-load current rating of the motor

Disconnecting
means for torque motors shall
have an ampere rating of at least 
________ percent of the motors
nameplate current

Disconnecting
means for torque motors shall
have an ampere rating of at least 115
percent of the motors  ________

In phase arrangements of Bus
Bars and Conductors, the
________ phase shall be that phase having the HIGHER VOLTAGE to ground on 3-phase, 4wire delta-connected
system

In phase arrangements of Bus
Bars and Conductors, the   “B   phase”  
shall be that phase having the ________on 3-phase, 4wire
delta-connected system

In phase arrangements of Bus
Bars and Conductors, the “B   phase”  
shall be that phase having the HIGHER
VOLTAGE to ground on 
________system

The
phase arrangement on 3-phase horizontal common power and vertical buses shall
be  ________,  ________, ________ from Front to Back,
Top to Bottom or Left to Right , as viewed from the front of the
Motor Control Center

The
phase arrangement on 3-phase horizontal common power and vertical buses shall
be   A,  B,   C  from Front to Back,Top to BottomorLeft
to Right , as viewed from the________ of the Motor Control Center

The
phase arrangement on 3-phase horizontal common power and vertical buses shall
be  A,  B,  C
from________,  ________, ________  , as viewed from the front of the Motor Control Center

(Exception)  :Rear-mounted
units connected to vertical bus that is common to front- mounted units,  shall be permitted to have a ________
phase arrangement where properly
identified

Where
used as service equipment,  each motor
control center shall be provided with a single main disconnecting means to disconnect all ________ service
conductors