Commercial Electrical Wiring Exam Questions with Complete Solutions Latest Update
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Commercial Electrical Wiring
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Commercial Electrical Wiring
Commercial Electrical Wiring Exam Questions with Complete Solutions Latest Update
__________is a lightweight tubular raceway without threads on each end. - Answers EMT
Conductor fill cannot exceed ______% in underfloor raceways. - Answers 40
RMC must be securely fastened at a maximum of every _...
__________is a lightweight tubular raceway without threads on each end. - Answers EMT
Conductor fill cannot exceed ______% in underfloor raceways. - Answers 40
RMC must be securely fastened at a maximum of every ____ feet. - Answers 10
FMC must be securely fastened _______ inches away from a box, conduit body, or panel. - Answers 12
Most non metallic raceways are made of __________. - Answers PVC
_______ is an enclosed channel for routing and placing conductors and cables. - Answers raceway
Conduit nipples have a maximum fill rate of _____% of their cross sectional area. - Answers 60
What is the maximum distance conduit must be supported from a box, panel, or conduit body unless
there is an exception? - Answers 3 ft
A___________ is a raceway and is used between a junction box and a luminaire( fixture) and is flexible
to allow for moving and vibration. - Answers fixture whip
_______________ conductors are two or more conductors that are electrically connected at each end to
form a single conductor. - Answers paralleled
The nominal inch-based designation used to identify the size of conduits is called the ______ ________.
- Answers trade size
A(n)__________bend is a double conduit bend with two equal angles bent in opposite directions that
are used to make a change in elevation in a conduit run. - Answers offset
FMC is safe for use as a EGC(equipment grounding conductor) - Answers false
wire ways can be concealed - Answers false
Conductor fill is the total amount of conductors allowed in a raceway and may have different ranges of
fill depending on the number of conductors and the insulation rating of those conductors. - Answers
true
Jamming can occur when conductors become twisted and are pulled through a bend in conduit. -
Answers true
Metal raceways cannot be used as an ECG. - Answers false
IMC has a thicker conduit wall the RMC - Answers false
To properly bond sections of cable tray a bonding jumper must be installed. - Answers true
all bonding jumpers must be insulated - Answers false
, A _______ is a metal component that contacts earth and has a conductor connected to it. - Answers
grounding electrode
When installing service disconnects, they must be grouped together with no more than ____ in one
location. - Answers 6
Mechanical grounding connectors are typically made of high-______ alloy. - Answers copper
A(n)___________is an electrical conductor used to connect non current carrying metal parts of
equipment or enclosures to the system grounded conductor or grounding electrode conductor.
You Answered - Answers equipment grounding conductor
A(n)_________is the winding of a transformer that gets power from the source. - Answers primary
winding
____________ are designed to raise, lower, or isolate voltage in electrical distribution systems. -
Answers transformers
A battery system that is used for standby and emergency power is called a__________. - Answers UPS
A_______________ is a service conductor that is installed underground from a transformer to a
building. - Answers service lateral
In addition to the equipment grounding , _______and _______are also used to protect against ground
faults. - Answers fuses , circuit breakers
Examples of separately derived systems include, _____, solar voltaic systems, generators, and
transformers. - Answers batteries
_____________ transformers isolate the power circuit of a control circuit , providing additional safety to
the circuit operator. - Answers control
_____________ transformers isolate the power circuit of a control circuit , providing additional safety to
the circuit operator. - Answers 90,110
The connection from the equipment grounding conductor to the grounding electrode is called
the______________. - Answers main bonding jumper
the insulation rating for most conductors with a circuit voltage of 480 volts is typically rated at
_________volts. - Answers 600
Bonding methods are used to protect personnel and equipment from __________. - Answers ground
fault conditions
A typical__________ ignites powdered copper-oxide and aluminum to produce a heat reaction. -
Answers exothermic welding process
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