Articles 100 - 110 - Definitions & Requirements for Electrical Installations
Branch Circuit, Multiwire
A branch circuit consisting of two or more circuit phase conductors with a *common neutral conductor*
Branch Circuit, Individual
A branch circuit that only supplies one load
Bonding Jumper, Main
A conductor, screw, or strap used to connect the circuit equipment grounding conductor to the neutral conductor or to *the supply side bonding jumper at the service equipment* in accordance with 250.24(B)
Continuous load
A load where the maximum current is expected to continue for 3 hours or more. i.e - schools, office buildings, stores, parking lot lighting
Building
A structure that stands alone or that is cut off from adjoining structures by fire walls
Converter
AC to DC
Bonded (Bonding)
Connected to establish electrical continuity and conductivity
Weatherproof
Constructed or protected so that exposure to the weather will not interfere with successful operation
Inverter
DC to AC
Separately derived systems
Separately derived systems are power sources with no direct electrical connection between any of the circuit conductors and supply conductors.
Branch Circuit
The conductors between the final overcurrent device and the outlets / lighting outlets
Bonding jumper, equipment
The connection between two or more portions of the equipment grounding conductor
Equipment bonding jumper
The connection between two or more portions of the equipment grounding conductor. ** the connection / conductor used to bond the grounding terminal to a grounded box
Ampacity
The current, in amperes, that a conductor can carry continuously under the conditions of use without exceeding its temperature rating.
All switchboards, switchgear, panelboards, and motor control centers shall be located in dedicated spaces and protected from damage and the working clearance space for outdoor installations shall include the zone described in ____ a - 110.26(A) b - 110.26(B) c - 110.26(C) d - 110.26(D)
a - 110.26(A)
A ____ is an accommodation that combines living, sleeping, sanitary, and storage facilities within a compartment a - guest room b - guest suite c - dwelling unit d - single family dwelling
a - guest room 100.D
A *branch circuit* that supplies only one utilization equipment is an ____ branch circuit a - individual b - general purpose c - isolated d - special purpose
a - individual 100.D
____ at other than dwelling units shall be legibly field marked with the maximum available fault current, include the date the fault current calculation was performed, and be of sufficient durability to withstand the environment involved a - service equipment b - sub panels c - motor control centers d - all of these
a - service equipment 110.24(A)
The ____ is the necessary equipment, usually consisting of a *circuit breaker(s) or switch(es) and fuse(s) and their accessories, connected to the *load end of service conductors*, and intended to constitute the main control and cutoff of the supply a - service equipment b - service c - service disconnect d - service overcurrent device
a - service equipment 100.D
Working space shall not be used for ____ a - storage b - raceways c - lighting d - accessibility
a - storage 110.26(B)
A *battery system* includes storage batteries and battery chargers, and can include inverters, converters, and associated electrical equipment a - true b - false
a - true 100.D
Due to its power limitations, a *class 2 circuit* considers safety from a fire initiation standpoint and provides acceptable protection from electric shock a - true b - false
a - true 100.D
The minimum height of working spaces about electrical equipment, switchboards, panelboards, or motor control centers operating at 1000Volts nominal, or less and likely to require examination, adjustment, servicing, or maintenance while energized shall be 6.5 ft or the height of the equipment, whichever is greater, except for service equipment or panelboards in existing dwelling units that do not exceed 200 amps a - true b- false
a - true 110.26(A)(3)
Listed or labeled equipment shall be installed and used in accordance with an instructions included in the listing or labeling a - true b - false
a - true 110.3(B)
NFPA 70E, standard for electrical safety in the workplace, provides information to help determine the electrical safety training requirements expected of a *qualified person* a - true b - false
a - true also provides guidance for selecting ppe 100.D
Ground Fault
a type of fault in which the unintentional pathway of the straying electrical current flows directly to the earth (to the ground) - unintended continuity between ground wire and a current carrying conductor
Objectionable current
any current flow over conductors not designed to NORMALLY be current carrying. EGCs are designed to carry current, just not during NORMAL operation
A permanently connected *surge protective device (SPD)* intended for installation on the load side of the service disconnect overcurrent device, including SPDs located at the branch panel, is a type ____ SPD a - 1 b- 2 c - 3 d - 4
b - 2 100.D
The required working space for access to live parts or equipment operating at *300 volts to ground*, where there are exposed live parts on one side and grounded parts on the other side is ____ ft a - 3 b - 3.5 c - 4 d - 4.5
b - 3.5 110.26(A)(1) table
Electrical equipment rooms or enclosures housing electrical apparatus that are controlled by lock(s) shall be condisered ____ to qualified persons a - readily accessible b - accessible c - available d - secured
b - accessible 110.26(F)
The ____ of any system is the ratio of the maximum demand of a system, or part of a system, to the total connected load of a system a - load b - demand factor c - minimum load d - calculated factor
b - demand factor 100.D
Part III of article 100 contains definitions which are applicable to ____ a - solar (pv) systems b - hazardous (classified) locations c - electrical systems over 1000v d - healthcare facilities
b - hazardous (classified) locations 100. scope
*Nonautomatic* is defined as requiring ____ to perform a function a - protection from damage b - human intervention c - mechanical linkage d - all of these
b - human intervention 100.D
A wire that is run along with integral to a cable or conductor to provide *mechanical support* for the cable or conductor is a ____ a - tension wire b - messenger wire c - guy wire d - strain relief wire
b - messenger wire 100.D
Any electrical circuit that *controls any other circuit through a relay* or an equivalent device is called a ____ a - primary circuit b - remote control circuit c - signal circuit d - controller
b - remote control circuit 100.D
The *ungrounded conductors* between the utility electric supply system and the service point are known as the ____ a - utility service b - service lateral c - service drop d - main service conductors
b - service lateral 100.D
A *service drop* is defined as the overhead conductors bwtween the utility electric supply system and the ____ a - primary circuit b - service point c - grounding electrode d - equipment grounding conductor
b - service point 100.D
For large equipment that contains service disconnecting means installed in accordance with 230.71 where the combined ampere rating is ____ amperes or more and over 6 ft wide, there shall be one entrance to and egress from the required working space not less than 24 in. wide and 6.5 ft high at each end of the working space a - 800a b - 1000a c - 1200a d - 2000a
c - 1200a 110.26(C)(2)
The minimum working space on a circuit for equipment operating at *750 volts to ground*, with exposed live parts on one side and grounded parts on the other side of the working space is ____ ft a - 1 b - 3 c - 4 d - 6
c - 4 110.26(A)(1) table
By definition, an *attachment fitting* is different from an attachment plug because no ____ is associated with the fitting a - cable b - fixture wire c - cord d - wiring compartment
c - cord 100. D
*Composite optical fiber cables* contain optical fiber cables and ____ a - strength members b - vapor barriers c - current carrying electrical conductors d - recycled plastic
c - current carrying electrical conductors 100. D
The installed conductive paths that is part of a ground fault current path and connects normally noncurrent carrying metal parts of equipment together and to the system grounded conductor or to the grounding electrode conductor, or both is known as a ____ conductor a - grounding electrode b - grounding c - equipment grounding d - neutral
c - equipment grounding conductor (EGC) 100.D the conductor terminated to the ground screw, and or the conductor terminated onto the ground bar
Connected (connecting) to ground or to a conductive body that extends the ground connection is called ____ a - equipment grounding b - bonded c - grounded d - all of these
c - grounded 100.D
A conducting object through which a *direct connection to earth* is established is a ____ a - bonding conductor b - grounding conductor c - grounding electrode d - grounded conductor
c - grounding electrode 100.D ground rod
The conductors connected to the direct current input of an inverter for PV systems form the ____ a - branch circuit b - feeder c - inverter input circuit d - inverter output circuit
c - inverter input circuit 100.D
An *effective ground fault current path* is an intentionally constructed, low impedance electrically conductive path designed and intended to carry current during a ground fault condition from the point of a ground fault on a wiring system to ____ a - ground b - earth c - the electrical supply source d - the grounding electrode
c - the electrical supply source 100.D
Each disconnecting means shall be legibly marked to indicate it purpose unless located and arranged so ____ a - that it can be locked out and tagged b - its not readily assessable c - the purpose is evident d - that it operates at less than 300 volts to ground
c - the purpose is evident 110.22(A)
The *generating capacity, inverter* is the sum of parallel connected inverter maximum continuous output power at 40*C in ____ a - amps or kVA b - volts or kV c - watts or kW d - a 24/h period
c - watts or kW 100.D
Waertight
constructed so moisture will not enter the enclosure under specific test conditions
*Within sight from* means visible and not more than ____ ft distant from the equipment a - 10 b - 20 c - 25 d - 50
d - 50 100.D
A *multiwire branch circuit* consists of ____ a - two or more ungrounded conductors that have a voltage between them b - a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit c - a grounded conductor connected to the neutral or grounded conductor of the system d - all of these
d - all of these 100. D
A *hybrid system* is comprised of multiple power sources, such as ____ , but not the utility power system a - photovoltaic b - wind c - micro-hydro generators d - all of these
d - all of these 100.D
*Information* and *technology equipment* and systems are used for creation and manipulation of ____ a - data b - voice c - video d - all of these
d - all of these 100.D ITE
Examples of *ground fault current paths* include any combination of conductive materials including ____ a - equipment grounding conductors b - metallic raceways c - metal water and gas piping d - all of these
d - all of these 100.info
All ____ shall be covered with an insulation equivalent to that of the conductors or with an identified insulating device a - splices b - joints c- free ends of conductors d - any of these
d - all of these 110.14(B)
In judging equipment for approval, consideration such as ____ shall be evaluated a - mechanical strength b - wire bending space c - arching effects d - all of these
d - all of these 110.3(A)(2,3,6)
Separately installed pressure connectors shall be used with conductors at the ____ not exceeding the ampacity at the listed and identified temperature rating of the connector a - voltages b - temperatures c - listings d- ampacities
d - ampacities 110.14(C)(2)
A *hoistway* is any ____ in which an elevator or dumbwaiter is designed to operate a - hatchway or well hole b - vertical opening or space c - shaftway d - any of these
d - any of these 100.D
Equipment or materials to which has been attached a(n) ____ of an field evaluation body (FEB) indicating the equipment or materials were evaluated and found to comply with requirements as described in an accompanying field evaluation report is known as *field labeled* a - symbol b - label c - other identifying mark d - any of these
d - any of these 100.D
As applied to electrical equipment the term 'recommended' may be interchangeable with the term ____ a - rebuilt b - refurbished c - remanufactured d - any of these
d - any of these 110.21(A)(2)
Systems of illumination utilizing *fluorescent lamps, high intensity discharge (HID) lamps, or neon tubing* are all types of ____ a - area lighting b - flood lighting c - security lighting d - electric discharge lighting
d - electric discharge lighting 100.D
Surrounded by a *case, housing, fence, or walls* that prevents persons from accidentally contacting energized parts is called ____ a - guarded b - covered c - protection d - enclosed
d - enclosed 100.D
A conductor used to connect the system grounded conductor or the equipment to a grounding electrode or to a point on the grounding electrode system, is called the ____ conductor a - main grounding b - common main c - equipment grounding d - grounding electrode
d - grounding electrode conductor (GEC) 100.D from the ground bar to the ground rod, or from the ground bar to the water piping
The term *luminaire*
means a complete lighting unit composed of a lamp or lamps
Circuit breaker, instantaneous trip
operate on the principal of electromagnetism and are used for motors. Only providing short circuit and ground fault protection
Overload
operation of equipment in excess of normal full load amps (FLA), or of a conductor is excess of rated ampacity
Circuit breaker, inverse time
purposely designed to delay its tripping during an overcurrent condition. most common
Feeders
the circuit conductors between the service disconnect and the final branch circuit overcurrent device
Service
the conductors and equipment *connecting* the serving electric utility to the wiring system of the premises served
Fault current
the current delivered at a point on the system during a short circuit or ground fault condition
Service point
the point where the serving electric utility conductors connect to customer owned wiring
Service drop / conductors
utility owned overhead conductors between the serving electric utility and the service point
Short circuit
when there is unintentional continuity between two phase conductors
