Commercial Electrical Wiring Exam Questions with Complete Solutions Latest Update
1 view 0 purchase
Course
Commercial Electrical Wiring
Institution
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
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller TutorJosh. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $7.99. You're not tied to anything after your purchase.
