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WorksheetsNEC Code Midterm
Total questions: 68
Worksheet time: 17hrs 0mins
The NEC was first Published in
True or False Chapter 1 - 4 of the NEC applies generally to all electrical installations?
True
False
Chapters 5-7 are supplements that modifies chapters 1-4
True
False
Chapter 8 is also modified by chapters 1-4
True
False
The NEC has permissive rules, whom are the permitted rules intended for?
General Contractor
Laborer
Electrician
Electrical Inspector
Which article can I find the requirements for the examination of equipment safety?
90.9
90.4
90.7
90.6
In the NEC the informative annex's are mandatory?
True
False
Factory installed wiring is not subject to inspection where can I find this in the code.
90.7
110.8
210.8
90.6
I'm told where the actual size of a product is not the same as the nominal size, we are able to use trade size designators, which section can I find that information in?
90.9
110.9
210.9
250.9
You are on a project and your're the lead code guy. A person whom works with would like to know where they can find information about how many chapter there are in the code book which section are you going to tell him.
(a)
CMP-10 stands for
Consumer Management Protection - 10
Copper Management Protector - 10
Code Making Panel- 10
Code Marking Panel - 10
An individual branch circuit can supply 2 pieces of utilization equipment so long as the circuit breakers are designed to open and close the circuit by nonautomatic means.
True
False
A system consisting of components and materials intended for installation as protection for specific electrical wiring systems with respect to the disruption of electrical circuit integrity upon exterior fire exposure
Electrical Circuit Protective Systems
Fault Current
Disconnect means
None of the above
A panelboard is considered an enclosure
True
False
What is the generic term for a group of nonflammable hydrocarbons?
Askarel
The circuit between the final overtcurrent device protecting the circuit and the outlet
Branch circuit
Feeder Circuit
Services
Amendments
A unit of an electrical system, other than a condcutor that carries or contrtols electric energy as it's principal function
Device
Equipment
General Device
General Equipment
If rear access is necessary to work on deenergized parts on the back of enclosed equipment, a minumum working space of ___ in. horizontally shall be required.
30
48
36
60
Which section can I find the requirments for circuits not greater than 30 Volts rms, 42 Volts peak or (a)
Equipment doors and hinged panels shall have at least a ___ degree opening provided in the workspace (600V or less)
90
45
60
30
The minimum clearance for a moto control center supplied with 12.460 volts and installed opposite a concrete wall is _____ ft.
3
5
4
6
The work space shall be clear and extend from the grade, floor, or platform to a height of 7.5ft or the height of the equipment,
True
False
The minimum working space of ____ in. width shall be required in front of electrical equipment operating at 600V or less
24
36
30
48
The minimum number of overcurrent devices permitted for a service's shall be ____ to ____ circuit breakers or six sets of fuses installed in a service entrance panel
1-6
1-4
1-8
1-3
All other service entrance conductors other than (a) service entrance condcutors shall be protected against physical damage.
Service Drop conductors shall not be samller than _ AWG copper or 6 AWG aluminum
8
12
14
10
At least a ___ amp service disconnecting means shall be installed for a single family dwelling
50
100
200
150
Fixture wire shall be permitted to be tapped to the branch circuit conductors of a branch circuit.
True
False
Where an orderly shutdown is required to minimize the hazard to personnel and equipment, a system of coordination based on the following two condition shall be permitted
Coordinated short circuit protection / Overload indication based on monitoring systems or devices
Coordinated over voltage protection / Overload indication based on monitoring systems or devices
Coordinated circuit protection / Overload indication based on monitoring systems or devices
Coordinated short circuit protection / Overvoltage indication based on monitoring systems or devices
The space equal to width and deep of the equipment and extending from the floor to a height of ___ ft above the equipment or to the structure ceiling whichever is lower, shall be dedicated to the electrical installtions, (600 Volts)
4
6
10
25
Where equipment rated (a) ampers or more that contains overcurrent devices, switching devices, or control devices installed.
Where can I find the section about clear working spaces?
(a)
Other equipment that is associated with the electrical installation and is located above or below the electrical equipment shall be permitted to extend not more than ___ in. beyond the front of the electrical equipment
6
18
12
24
Circuit breakers shall open all ungrounded conductors of the circuit both manually and (a) unless otherwise permitted.
The largest size of a ground electrode conductor for alternating current systems is ( select all that apply)
3/0
250kcmil
8 AWG
6 AWG
The service mast shall be of adequate strength or be supported by braces or ___ ____
(a)
Circuit breakers shall be permitted to be used with grounded, ungrounded, or grounded neutral systems when identified with a (a) voltatge marking.
It's ok to leave non-conductive paint, enamel, or similar coating at threads contact points and contact surfaces
False
True
Grounding eletrodes condcutors of the wire type shall be soild or stranded, insulated, covered or bare.
True
False
The grounding eletrode conductor shall be of copper, aluminum, _____- ____ ______.
(a)
If practicable, rob, pipe, or plate electrode shall be embedded (a) permanent moisture level
Aluminum can be used as a grounding electrode so long as the conductor is coated by an corrosive inhabitor
True
False
A plate electrde shall not expose not less than __ ft of surface to exterior soil.
4
6
8
Nromally non-current carrying conductive materials enclosing electrical conductors or equipment or forming part of such equipment shall be connected to (a)
The equipment grounding conductor in a flexible cord with the largest circuit conductor 10 AWG or smaller shall not be smaller than (a) AWG
The term “listed” means that ____.
equipment, materials, or services meet appropriate designated standards or have been tested and found suitable for a specified purpose
equipment or material must continue to comply with the appropriate standards (or performance) under which the labeling was granted
equipment or material complies with discretionary standards as listed in the NEC®
equipment or material is listed for sale by general or subcontractors
Which agency is responsible for the maintenance and publication of the NEC®?
National Association of Electrical Engineers (NAEE)
National Firefighters Association (NFA)
Underwriters Laboratories (UL)
National Fire Protection Association (NFPA)
Occupational Safety and Health Adminstration ( OSHA)
An attachment plug establishes connection between ____.
conductors of the attached flexible cord and the conductors permanently connected to the receptacle
conductors of the attached flexible cord and a suitable ground
junction box and a suitable ground
junction box and the attached flexible cord
A feeder consists of all circuit conductors located ____.
within a panel board or junction box
within the main branch line and the overcurrent device
between the service equipment, the source of separately derived system, or other power supply source and the final branch-circuit overcurrent device
inside the point of demarcation
Panelboards having doors or covers are considered ____.
accessible
inaccessible
grounded
guarded
____ wire, together with strain insulators, is used to support conductors in all spans exceeding 40 ft (12 m) in length.
Overhead
Outdoor
Messenger
Medial
Conductors in concealed raceways, even though they may become accessible by withdrawing them, are still considered ____.
concealed
inaccessible
grounded
distributed
When metal parts are required to be electrically connected, a(n) ____ is installed, thereby guaranteeing the required electrical conductivity.suitable ground (equipment ground)
fusible link
appliance branch
suitable ground (equipment ground)
reliable conductor (bonding jumper)
A contact device installed at an outlet for the connection of an attachment plug is a(n) ____.
Jump-off
outlet contact
ground
receptacle
The NEC® arose as a consensus of more than 1200 individuals primarily to ____.
standardize price schedules
combat a growing epidemic of electrical fires
standardize equipment
use as a marketing tool
The word luminaire refers to ____.
the light source only
the complete lighting unit
the lampholder
parts to position the light source
Mandatory rules in the NEC® contain the language ____.
“must” or “must not”
“shall” or “shall not”
“penalties for noncompliance”
“suggested but discretionary”
The UL logo indicates that ____.
the listed product is guaranteed to be risk free
the listed product complies with UL standards
the product complies with OSHA standards
independent testing was performed in Underwriter’s Laboratories
Type AC cable must have a bending radius at least ____ times the diameter of the cable.
weather
physical damage
traffic
electrical interference
Type AC cable must have a bending radius at least ____ times the diameter of the cable.
five
six
three
eight
Generally, ungrounded (hot) conductors can be any color except ____.
yellow, red, or green with yellow stripes
red, yellow, or gray
white, gray, or red
white, gray, green, or, green with yellow stripe(s)
Holes must be bored so that the edge of the hole is at least ____ from the nearest edge of the wood member.
1 1/8 in. (29 mm)
1 in. (25 mm)
1 1/2 in. (38 mm)
1 1/4 in. (32 mm)
Nonmetallic-sheathed cable passing through holes (or slots) in metal framing must be protected by ____ covering all metal edges.
plastic covers (insulation)
electrical tape
listed bushing (grommets)
rubber inserts
Type AC cable shall have a(n) ____.
anit-short bushing
clamp fastening
Flexible metal tape armor
internal grounding
What is the minimum vertical clearance (in ft.) for 208Y/120-Volt, 3-phase overhead service conductors in a commercial area subject to minimal truck traffic
10 ft
15 ft
12 ft
18 ft
The minimum size of the conductors for a service are ____ AWG CU or ____AWG AL-CU Conductors
8 AWG & 6 AWG
8 AWG & 12 AWG
6AWG & 4 AWG
6AWG & 12 AWG
Service-entrance cables shall be supported by straps or other approved means within _____ of every service head, gooseneck, or connection to a raceway or enclosure
6 inches
4 inches
12 inches
8 inches
Service Conductors run above the top level of windows that are designed to be opened are supposed to be how many feet above the window?
6
9
12
3
