Pec 8 Flashcards
Connection or fittings shall NOT connect grounding electrode conductors to equipment by means of ______
solder.
Each length of non-metallic conduit shall be clearly and durably marked at least every ________(mm) as required.
3,000 mm
Doors leading into a transformer vault shall be kept locked and access allowed only to ___________.
qualified person
Resistors and reactors shall NOT be installed in close proximity to combustible materials such that it constitutes a fire hazard. What is the minimum clearance that is required by the Code? (mm)
Ans. 300 mm
The grounded conductor shall be equal to the largest phase conductor.
6. Completely enclosed, ventilated transformers equipped with an 80C rise insulation may be installed in a room of ______________
fire resistant construction
in a switchboard there shall be an air space of at least _______(mm) between the energized metal part and the door of the cabinet.
25 mm
Electrical metallic tubing shall be securely fastened in place within _____(mm) of each outlet box, junction box, cabinet or fitting.
900 mm
Lead-in antenna conductors for television or radio equipment shall be securely ________(2) to antennas.
attached & fastened
Lighting fixtures approved for damp locations shall be installed only in ________.
damp locations
What is the metric size equivalent of 1,000 MCM? (mm2)
Ans. 500 mm2
Antenna conductors for television equipment shall be installed so they will not ____ under open electric light or power conductors where possible
cross
For churches, the general lighting load shall be computed at ____VA/m2.
8VA/m2
The following are common splicing rules EXCEPT one. Which one is this? (April 2016)
Wires of the same size should be spliced together in line
. Electric discharge lighting shall be connected by flexible cord if the cord is visible for ____% of its entire length.
100%
What is the latest edition of the PEC, Part 2?
Ans. 1988
is all circuit conductors between the service equipment or the generator switchboard of an isolate plant, and the final branch circuit over-current device.
Feeder
is a disruptive discharge through insulation.
Breakdown
Insulators used to support wires under cross arms are________
suspension
______________ is a pliable corrugated raceway of circular cross-section with integral or associated couplings, connectors and fittings for the installation of electric conductors.
Electrical non-metallic tubing
. The scope of the PEC covers all electrical conductors including optical fiber cable and equipment installed within or to or from any of the following premises, which one is NOT included?
Aircraft
Motor vehicles
Railway rolling stocks
All of these
All of these
The maximum size of liquid tight flexible metal conduit shall be ________(mm) trade size.
100 mm
Transformers that are installed in unsupervised locations and rated over 600 V are protected by fuses on the primary side and cannot exceed _____% of the primary full load current.
300%
Each length of intermediate metal conduit shall be clearly and durably identified at ______(mm) intervals with the letters “_____”.
760 mm
IMC
What is the maximum rating of a molded case circuit breaker to protect a 10 hp squirrel cage induction motor rated at 230 volts, 3-phase, 60 Hz with a full load rating of 28 A? (A)
Ans. 70 A
Size = 250% of FLA = 2.5(28) = 70 A
Conductors used only for grounding shall be________(3) . (April 2016)
green, green with yellow stripes, or bare
The grounded conductor shall be equal to the largest _____ conductor.
phase
Screw type lamp holders shall have the _______conductor connected to the screw shell. (April 2016)
grounded
is the ratio of the maximum demand of a system or part of a system to the total connected load of a system or the part of the system under consideration.
Demand factor
Electrical non-metallic tubing smaller than ______(mm) (outside diameter) electrical trade size shall NOT be used.
20 mm
Fixture studs in octagonal boxes used to mount lighting fixtures are computed on the ______conductor entering the box.
biggest
Type NM (non-metallic sheathed cable) shall be permitted for__________(2) work in normally dry locations.
exposed & concealed
Transformers rated over ____V and installed in supervised locations are protected by circuit breakers on the primary side and cannot exceed ____ % of the primary full load current.
600 V
600%
The unit lighting for a dwelling unit expressed in watts per square meter shall be _____w .
24 watts
A ______(2) (A) branch circuit shall be permitted to supply lighting units, other than utilization equipment or a combination of both.
15 A or 20 A
Type FCC cable shall be clearly and durably marked on both sides at intervals of NOT more than _______(mm)
600 mm
The starting winding of an induction motor is wound _______of the main winding.
on top
Outlet boxes are not required to have blank covers to prevent the escape of _______(2).
arcs and sparks
is a single or multi-conductor solid dielectric insulated cable rated 2,001 volts or higher.
Type MV
Intermediate metal conduit shall be permitted to be installed in or under cinder fill where subject to permanent moisture when protected on all sides by a layer of non-cinder concrete NOT less than______(mm) thick.
50 mm
is a factory assembly of one or more conductors, each individually insulated and enclosed in a metallic sheath of interlocking tape of a smooth or corrugated tube.
Type MC Cable
Which of the following listed materials is considered among the best insulation material for motor rewinding?
(Nomex, Red fiber, Mylar, Fish paper)
Individual open conductors and cables other than service entrance cables shall NOT be installed within ________(mm) of grade level or where exposed to physical damage.
Bonding provides electrical continuity and safely conductors any__________.
A barrier shall separate underground coaxial cable when entering :_______________ (3)
Heavy duty lighting tracks shall be identified to exceed ____(A) in rating.
Where the conduits enter a switchboard at the bottom, a sufficient space shall be provided to permit installation of the conductors in the enclosure. The minimum spacing between the bottom of the enclosure and the non-insulated bus bar shall be _______(mm).
consists of three or more flat copper conductors placed edge to edge, separated and enclosed within an insulating assembly.
The first choice for the grounding electrode of a separately derived system is a _______.
A fixture frame is considered grounded if connected by _____ or ____ in a continuous run
Non-metallic extensions shall NOT be used as an ____ cable.
The sum of all contained conductors of an auxiliary gutter at any cross section shall NOT exceed ___% of the interior cross sectional area of the said gutter.
Fluorescent lighting fixtures installed in ________ shall be attached to the framing of the ceiling by clips, bolts, screws, or rivets.
In rigid metal wiring conduit, conduits shall be supported at least every _______(mm)
Direct burial cables or conductors with a nominal voltage of 600 V or less and passes under airport runways including adjacent areas where trespassing is prohibited, shall have a minimum cover distance of _______(mm)
If the voltage level is from 250 to 600 V, the air space between the wall, door or gutter partition of any cabinet shall be at least ______(mm).
For motors with a marked service factor NOT less than 1.15, the multiplying factor to be used in determining for size of overload protection shall be____%.
For a motor starter to be in sight of the controlled motor, it must NOT be more than____m away
Pipelines with impedance heating shall NOT operate at greater than _____VAC.
The area within ______ (mm) horizontally from an aircraft power plant shall be classified hazardous under ________ location.
Fixture chains shall be wired with _______ wire from the outlet box connections to the sockets of the fixture.
Metal faceplates for flush mounted snap switches shall be of ferrous metal NOT less than ______ (mm) in thickness.
Flexible metallic tubing smaller than ____(mm) electrical trade size shall NOT be used.
The sum of the cross sectional areas of all contained conductors at any cross section of the wireway shall NOT exceed ___% of the interior cross sectional area of the wireway.
Where nails or screws are likely to penetrate non-metallic sheathed cable or electrical non-metal tubing, a steel sleeve or steel clip NOT less than____(mm) in thickness shall be used to protect the cable or tubing.
An auxiliary gutter shall NOT extend a greater distance than _______(mm) beyond the equipment, which it supplements.
A clearance of NOT less than ______(mm) shall be provided from recessed fixtures and their trims, ventilating openings and other such openings in room surfaces.
Storage batteries in _______ for dwellings shall have cells operating at less than ____V.
The minimum spacing between the bottom of enclosure and the insulated busbars, their supports and other obstructions shall be _____(mm).
________ consists of a group of wire twisted to form a metallic string.
Service drop conductors passing through sidewalk accessible only to pedestrians where the voltage is limited to 300 V to ground shall maintain a vertical clearance of NOT less than ______(mm) at the electric service entrance to buildings.
Secondaries of transformers supplying voltage for impedance heating of vessels are computed at NOT less than _____% of the heating load.
The ampacity of supply branch circuit conductors supplying diagnostic equipment and the current rating of the over-current protective devices shall NOT be less than ____% of the momentary rating or _____% of the long time rating whichever is larger.
In dwelling units and guestrooms of hotels, motels and similar occupancies, the voltage shall NOT exceed _______V nominal between conductors that supply the terminals of medium base screw shall lamp holders.
The grounding electrode for grounding communications system may be connected to the nearest accessible location on any of the following EXCEPT one. Which one is this?
Buried interior PVC water piping system
Grounding electrode conductor
Building structure of a concrete building
Grounding terminal of service equipment if provided by the utility company
Transformers used to step down voltage for general use are classified as _________ systems.
For a portable motor rated at _____ or less, the controller shall be permitted to be an attachment plug and receptacle.
_________ – Hazardous locations in which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitable mixtures.
A fixture requiring supply wire rated higher than ____C shall be so marked in letters _____ (mm) high prominently displayed on the fixture.
Rosettes for exposed wiring shall be provided with bases that shall be high enough to keep the wires and terminals at least _____ (mm) from the surface wired over.
Branch lighting circuits shall be protected by over-current devices NOT rated more than ____A
Solar photovoltaic systems in a one-family dwelling units with circuits rated over ___V_ to ground while energized shall NOT be accessible to other than qualified persons.
Where liquid tight flexible metal conduit is installed as a fixed raceway, it shall be secured at intervals NOT exceeding ____________.(mm)
is an approved assembly of insulated conductors with fittings and conductor terminations in a completely enclosed ventilated protective metal housing.
The inner strand of ACSR is made of _____
I
If two or more buildings are supplied by a grounded system from one main service, each building shall have separate ___________
The continuous load supplied by a branch circuit shall NOT exceed the branch circuit rating by more than ___%.
is a cable provided with a wrapping or metal usually steel wires or tapes, primarily for the purpose of mechanical protection.
In all cases where there are energized parts on the front of the switchboards or motor control centers, the working space in front of such equipments shall NOT be less than _______(mm) of distance
Border lights shall be installed around stages in theaters on circuits rated at ____A or less
Wirings allowed to be installed outside buildings are enumerated below EXCEPT one. Which one is this?
Type MC cable
Flat conductor cable
Rigid metal conduit
Open wires on insulators
Conductors supplying a heating unit shall be calculated at ____% times the heating load plus the blower motor.
Masts separate from the structure to be protected shall be a minimum of ______ from the protected structure.
Lighting track conductors shall be a minimum of _______(mm2) or equal and shall be copper.
The walls and roofs of transformer vaults shall be constructed of materials that have adequate structural strength for the condition with a minimum fire resistance of ______
. In order to protect a personnel and prevent shock, the equipment should be connected good earth ground through the ____________
When computing the service load with the standard method, more than three fixed appliances are computed with a demand factor of ____% of the nameplate rating.
When computing the service load with the standard method, a 20 kW electric space heating unit is computed at _____%
Where knobs are used, conductors shall be securely tied thereto by ___ having insulation equivalent to that of the conductor.
A photovoltaic power source having one conductor of a 2-wire system over ____V shall be solidly grounded.
The Code requires that all energized part of electrical equipment operating at ____V or more shall be guarded against accidental contacts by approved enclosures.
