ELMC Master Electrician Code 251-275
With Complete Solutions
A metal raceway system is installed in the washing area of a car wash. What minimum
distance from the surface must the raceway be mounted?
a. 1 inch
b. 1/4 inch
c. 1/2 inch
d. 3/4 inch - ANSWER-1/4 inch
NFPA 70 : NEC 2011 : 300.6.D
A non locking disconnect for 480 volt motor controller must be visible from the controller
and within a maximum of how far from the controller?
a. 50 feet
b. 6 feet
c. 15 feet
d. 30 feet - ANSWER-50 feet
430-102 to Definitions 100 (insight) NEC 2005, 2008, 2011
According to Utah state law, what is the ratio of apprentices to journeyman or master
electricians on a commercial, institutional, or industrial jobsite?
a. 2 to 1
b. 1 to 1
c. unlimited
d. 3 to 1 - ANSWER-1 to 1
Utah NASCLA 1st ed appendix D page D-13
An overcurrent sensing device shall cause the main switch to open the load on an
autotransformer if the continuous current per phase or neutral rating exceeds
___________.
a. 175%
b. 125%
c. 250%
d. 300% - ANSWER-125%
NFPA 70 : NEC 2011 : 2017 : 450.4.A
At what HP should a continuous duty motor be protected against overloads?
a. more than 2 HP
b. more than 1 HP
c. More than 3 HP
, d. More than 5 HP - ANSWER-More than 1 HP
NEC 2005 430.32.A
Conductors between the service equipment and the final branch circuit over current
device are called:
a. bonding conductor
b. feeder conductors
c. grounding conductor
d. branch circuits - ANSWER-feeder conductors
NEC 08 definitions
Fourteen (14) current carrying conductors are in an 80 foot conduit run operating at 28
degrees C or 82 degrees F. Each conductor shall be derated to what percentage of its'
original ampacity?
a. 70%
b. 80%
c. 60%
d. 50% - ANSWER-50%
NFPA 70 : NEC 2011 : 310.15.B.2.a
Given: Only the following type THW conductors are all installed in an auxiliary gutter. 8,
size 1 AWG conductors; 7, size 2 AWG conductors; 4, size 3 AWG conductors; 6, size 6
AWG conductors. What minimum size auxiliary gutter is required for these 25
conductors?
a. 4 inch x 4 inch
b. 12 inch x 12 inch
c. 6 inch x 6 inch
d. 8 inch x 8 inch - ANSWER-6 inch x 6 inch
NFPA 70 : NEC 2011 : 366.22 & chapter 9 Table 5
If 1100 amps does not fit an overcurrent device, then you must increase the protection
to how much?
a. 1000 amps
b. 900 amps
c. 1100 amps
d. 1200 amps - ANSWER-1200 amps
NFPA 70 : NEC 2011 : 240.4.C to 240.6.A
In a hermetic refrigerant motor compressor, the ampere rating shall be ________
percent of the nameplate rated load current.
a. 100
With Complete Solutions
A metal raceway system is installed in the washing area of a car wash. What minimum
distance from the surface must the raceway be mounted?
a. 1 inch
b. 1/4 inch
c. 1/2 inch
d. 3/4 inch - ANSWER-1/4 inch
NFPA 70 : NEC 2011 : 300.6.D
A non locking disconnect for 480 volt motor controller must be visible from the controller
and within a maximum of how far from the controller?
a. 50 feet
b. 6 feet
c. 15 feet
d. 30 feet - ANSWER-50 feet
430-102 to Definitions 100 (insight) NEC 2005, 2008, 2011
According to Utah state law, what is the ratio of apprentices to journeyman or master
electricians on a commercial, institutional, or industrial jobsite?
a. 2 to 1
b. 1 to 1
c. unlimited
d. 3 to 1 - ANSWER-1 to 1
Utah NASCLA 1st ed appendix D page D-13
An overcurrent sensing device shall cause the main switch to open the load on an
autotransformer if the continuous current per phase or neutral rating exceeds
___________.
a. 175%
b. 125%
c. 250%
d. 300% - ANSWER-125%
NFPA 70 : NEC 2011 : 2017 : 450.4.A
At what HP should a continuous duty motor be protected against overloads?
a. more than 2 HP
b. more than 1 HP
c. More than 3 HP
, d. More than 5 HP - ANSWER-More than 1 HP
NEC 2005 430.32.A
Conductors between the service equipment and the final branch circuit over current
device are called:
a. bonding conductor
b. feeder conductors
c. grounding conductor
d. branch circuits - ANSWER-feeder conductors
NEC 08 definitions
Fourteen (14) current carrying conductors are in an 80 foot conduit run operating at 28
degrees C or 82 degrees F. Each conductor shall be derated to what percentage of its'
original ampacity?
a. 70%
b. 80%
c. 60%
d. 50% - ANSWER-50%
NFPA 70 : NEC 2011 : 310.15.B.2.a
Given: Only the following type THW conductors are all installed in an auxiliary gutter. 8,
size 1 AWG conductors; 7, size 2 AWG conductors; 4, size 3 AWG conductors; 6, size 6
AWG conductors. What minimum size auxiliary gutter is required for these 25
conductors?
a. 4 inch x 4 inch
b. 12 inch x 12 inch
c. 6 inch x 6 inch
d. 8 inch x 8 inch - ANSWER-6 inch x 6 inch
NFPA 70 : NEC 2011 : 366.22 & chapter 9 Table 5
If 1100 amps does not fit an overcurrent device, then you must increase the protection
to how much?
a. 1000 amps
b. 900 amps
c. 1100 amps
d. 1200 amps - ANSWER-1200 amps
NFPA 70 : NEC 2011 : 240.4.C to 240.6.A
In a hermetic refrigerant motor compressor, the ampere rating shall be ________
percent of the nameplate rated load current.
a. 100
