Exam (elaborations)
IEC Year 2 Chapters 214 & 215 Questions and Answers 2024
- Course
- Institution
IEC Year 2 Chapters 214 & 215
[Show more]
Content preview
IEC Year 2 Chapters 214 & 215According to the NEC®, the smallest size permitted for branch circuit conductors
suitable for supplying other than cooking appliances is ___ AWG - answer14
Which of the following are permitted to be buried in a trench underground? The wiring
will be covered with stabilized sand to prevent physical damage. - answer Type MI
Cable
Conductor sizes are given in ___or ___. – answer AWG, Circular Mills
Conductors with thermoplastic and fibrous outer braid Type TBS insulation are used for
wiring ___. - answer Switchboards Only
Dual-rated THHN/THWN conductors have an insulation that permits installation in ___
locations. - answerDry, damp, wet 310.4 (A)
XHHW 500 kcmil conductors have an insulation that is ___ mm thick. - answer1.65,
310.4 (A)
The maximum temperature rating of a THHN conductor is ___°F in a dry location. -
answer194, 310.4 (A)
In a 480/277-volt, 3Ø, 4-W panel, a wire connected to breaker 41 is permitted by the
NEC® to be ___ in color. A 42-circuit panelboard is shown above. (Question 7 on
214.2) - answerYellow, Blue, Orange
Which of conductor insulation is oil resistant? - answerMTW
The minimum size conductor permitted in commercial buildings for branch circuits up to
and including 2000 volts is ___ AWG. - answer14
Type THW insulation has a ___ degree C rating for use in wiring through fixtures. -
answer90
What is the insulation temperature rating of type THWN wire in a wet location? -
answer75 C
Suffixes that designate the number of conductors within a cable include ___.
I. D - two insulated conductors laid parallel
II. M - two or more insulated conductors twisted spirally
, III. T - two or more insulated conductors twisted in parallel - answerI and II only, 310.8
(C)
Under certain conditions, the uninsulated conductor in nonmetallic-sheathed cable ___
permitted to be used as a current-carrying conductor ("hot" or neutral). Note: NM cable
is not permitted to be used as service-entrance cable. - answeris not
The ampacity of conductors is derated when the ambient temperature exceeds ___ºF. -
answer86, T310.16
What is the smallest conductor permitted to be connected in parallel - answer1/0 AWG,
310.10 (G) (1)
Which of the following about the equipment grounding conductor is true?
I. It does not count as a current-carrying conductor.
II. A bare, covered or insulated conductor shall be permitted.
III. For conduit fill, each grounding conductor counts as one conductor. - answerI, II, and
III 310.15 (F)
The parallel conductors in each phase or neutral shall ___.
I. have the same insulation type and conductor material
II. be the same size in cma
III. be the same length and be terminated in the same manner - answerI, II, and III
310.10 (G) (2)
When balancing a 3-wire circuit, from a single-phase 230/115-volt system, the neutral
conductor ___. - answershould carry the unbalanced current in each ungrounded
conductor 310.15 (E) (1)
For a raceway containing 30 current carrying conductors, the ampacity of each
conductor shall be reduced to ___ percent of that for a single conductor. - answer45,
310.15 (C) (1)
A 175-Amp breaker protects a feeder that originates in a 120/240-volt, 1-ph, 3-wire
service panel in a residence. Which of the following conductors is the smallest size
permitted for the feeder? - answer1/0, T310.16
Which of the following THHN/THWN copper conductors is the smallest size permitted
for a feeder where a 150 A breaker protects the feeder? The feeder originates in the
120/240-volt, 1-ph, 3-wire service panel in a bakery. - answer1/0, T310.16
When several AC, MC, or NMC cables are installed next to each other in a bundle, the
conductors in the cables are able to carry ___ current than if the cables were separated.
- answerless
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 julianah420. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
67866 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now