Where a water pipe passes over an indoor motor control center, leak protection apparatus shall have a MINIMUM clearance of _____.
a) 6 feet to the protection apparatus
b) 6 feet to the water pipe
c) 6 1⁄2 feet to the protection apparatus
d) 6 1⁄2 feet to the water pipe - ANSWERA: 6 feet t...
Where a water pipe passes over an indoor motor control center, leak protection apparatus shall have
a MINIMUM clearance of _____.
a) 6 feet to the protection apparatus
b) 6 feet to the water pipe
c) 6 1⁄2 feet to the protection apparatus
d) 6 1⁄2 feet to the water pipe - ANSWERA: 6 feet to the protection apparatus
Ref: 110.26(F)(1)(a)
Branch circuit grounded conductors that are not connected to an overcurrent device shall be
permitted to be sized at LEAST _____ of the continuous and noncontinuous load to be served.
a) 100 percent
b) 80 percent
c) 75 percent
d) 125 percent - ANSWERA: 100 percent
Ref: 210.19(A)(1), Ex. 2
The MAXIMUM standard rating of the initial non-time-delay fuse for the branch-circuit, short-circuit,
and ground-fault protection of a 1 HP, three-phase, 208-volt, squirrel-cage AC motor shall be _____.
a) 6 amperes
b) 10 amperes
c) 15 amperes
d) 20 amperes - ANSWERC: 15 amperes
Ref: 430.250; Tbl. 430.52; 430.52(C)(1), Ex.1
Sol: FLC of motor - 4.6 amperes x 300% = 13.8 amperes
, For Class III equipment that is not subject to overloading the MAXIMUM surface temperature under
operating conditions shall NOT exceed _____.
a) 120°C
b) 165°C
c) 248°F
d) 210°C - ANSWERB: 165°C
Ref: 503.5
When a metal wireway contains splices and taps, the conductors, splices and taps shall not fill the
wireway to more than _____ of its area at that point.
a) 20 percent
b) 30 percent
c) 40 percent
d) 75 percent - ANSWERD: 75 percent
Ref: 376.56(A)
Liquid-tight flexible metallic conduit (LFMC) shall NOT be used _____.
a) in lengths in excess of 6 feet
b) in concealed work
c) in hazardous locations
d) where subject to physical damage - ANSWERD: where subject to physical damage
Ref: 350.12(1)
Determine the allowable ampacity of a size 3 AWG THHN copper conductor given the following: (1)
Two current-carrying conductors are in the conduit. (2) The ambient temperature is 34°C. (3) The
terminations are rated 60°C.
a) 105.6 amperes
b) 85.0 amperes
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