(PEC-Chapter3) Sheet1-Part1

In both exposed and
concealed locations, where a cable- or raceway-type wiring method is installed
through bored holes in joists, rafters, or wood members, holes shall be bored
so that the edge of the hole is not less than ___ mm from the nearest edge of
the wood member. Where this distance cannot be maintained, the cable or raceway
shall be protected from penetration by screws or nails by a steel plate or
bushing, at least ___ mm thick, and of appropriate length and width installed
to cover the area of the wiring

Cable- or
raceway-type wiring methods installed in a groove, to be covered by wallboard,
siding, panelling, carpeting, or similar finish, shall be protected by ___ mm
thick steel plate, sleeve, or equivalent or by not less than __ mm free space
for the full length of the groove in which the cable or raceway is installed

Where raceways
containing ungrounded conductors __ mm² or larger enter a cabinet, box
enclosure, or raceway, the conductors shall be protected by a substantial
fitting providing a smoothly rounded insulating surface, unless the conductors
are separated from the fitting or raceway by substantial insulating material
that is securely fastened in place.

Direct-buried
conductors and enclosures emerging from grade shall be protected by enclosures
or raceways extending from the minimum cover distance below grade required by
3.0.1.5(a) to a point at least ___ mm above finished grade. In no case shall
the protection be required to exceed ___ mm below finished grade

Underground service
conductors that are not encased in concrete and that are buried ___ mm or more
below grade shall have their location identified by a warning ribbon that is
placed in the trench at least ___ mm above the underground installation

In portions of dairy
processing facilities, laundries, canneries, and other indoor wet locations,
and in locations where walls are frequently washed or where there are surfaces
of absorbent materials, such as damp paper or wood, the entire wiring system,
where installed exposed, including all boxes, fittings, raceways, and cable
used therewith, shall be mounted so that there is at least a __ mm airspace
between it and the wall or supporting surface

Raceways shall be
provided with expansion fittings where necessary to compensate for ___ and ___

___ is defined as the shortest distance in
millimetres (inches) measured between a point on the top surface of any
direct-buried conductor, cable, conduit, or other raceway and the top surface
of finished grade, concrete, or similar cover

What is the minimum cover distance of a directly buried cable under minimum of 100mm
thick concrete exterior slab with no vehicular traffic and with the slab
extending not less than 150mm beyond the underground installation?

The cover distance of
conductors installed in a rigid metal conduit in or under airport runways,
including adjacent areas where trespassing is prohibited shall be a minimum of
_____ mm

___ and ___
shall not be supported by ceiling grids

At least ___ mm of
free conductor, measured from the point in the box where it emerges from its
raceway or cable sheath, shall be left at each outlet, junction, and switch
point for splices or the connection of luminaires (fixtures) or devices. Where
the opening to an outlet, junction, or switch point is less than 200 mm in any
dimension, each conductor shall be long enough to extend at least __ mm outside
the opening

A ___ shall be
installed at each outlet and switch point for concealed knob-and-tube wiring

An intermediate metal
conduit is mounted vertically containing 5.5 mm2 conductors, what must be the
necessary support intervals of the mentioned conductors?

Flexible metal
conduit shall be permitted, in lengths not to exceed ___ mm, to connect
physically adjustable equipment and devices permitted to be in these ducts and
plenum chambers. The connectors used with flexible metal conduit shall
effectively close any openings in the connection.

(Requirements for Over 600 Volts, Nominal ) The conductor shall not be bent to a radius less than ___ times the overall diameter for nonshielded conductors or ___ times the
overall diameter for shielded or lead covered conductors during or after
installation.

Exposed runs of
braid-covered insulated conductors shall have a flame-retardant braid. If the
conductors used do not have this protection, a flame-retardant saturant shall
be applied to the braid covering after installation. This treated braid
covering shall be stripped back a safe distance at conductor terminals,
according to the operating voltage. Where practicable, this distance shall not
be less than ___ mm for each kilovolt of the conductor-to-ground voltage of the
circuit

(CONDUCTORS FOR GENERAL WIRING) Conductors shall be ___.

Where installed in
raceways, conductors of size ___ and larger shall be stranded

Aluminum, copper-clad
aluminum, or copper conductors of size ___ mm² and larger, comprising each
phase, polarity, neutral, or grounded circuit conductor, shall be permitted to
be connected in parallel (electrically joined at both ends)

Exception No. 2: Conductors in
sizes smaller than ___ mm2 shall be permitted to be run in parallel to supply
control power to indicating instruments, contactors, relays, solenoids, and
similar control devices, provided all of the conditions specified are met

Exception No. 3: Conductors in
sizes smaller than __ mm² shall be permitted to be run in parallel for
frequencies of ___ Hz and higher where conditions (a), (b), and (c) of
Exception No. 2 are met

Exception No. 4: Under the
supervision of a licensed electrical engineer, grounded neutral conductors in
sizes ___ mm2 and larger shall be permitted to be run in parallel for existing
installations

What is the minimum size of conductors (copper ,aluminum, copper-clad
aluminum) for conductor voltage rating of 
0-2000V?

Solid dielectric
insulated conductors operated above ___ volts in permanent installations shall
have ozone-resistant insulation and shall be shielded

FPN No. 2: Conductors
installed in conduit exposed to direct sunlight in close proximity to rooftops
have been shown, under certain conditions, to experience a temperature rise of
___ above ambient temperature on which the ampacity is based

The size in mm² or mm
diameter shall be repeated at intervals not exceeding ___ mm. All other
markings shall be repeated at intervals not exceeding ___ mm

Cite the 3 methods of
conductor marking

(Suffixes to
Designate Number of Conductors) A type letter orletters used alone shall indicate a single insulated conductor. The letter
suffixes shall be indicated as follows:

  (1) ____ - For two insulated
conductors laid parallel within an outer non-metallic covering

  (2) ____-For an assembly of two
or more insulated conductors twisted spirally within an outer non-metallic covering.

FPN: Thermoplastic
insulation may stiffen at temperatures lower than ____. Thermoplastic
insulation may also be deformed at normal temperatures were subjected to
pressure, such as at points of support. Thermoplastic insulation, where used on
dc circuits in wet locations, may result in electro-endosmosis between
conductor and insulation

(Selection of
Ampacity) Where more than one calculated or tabulated ampacity could apply for
a given circuit length, the ____ value shall be used

Exception: Where two different ampacities apply to adjacent portions of
a circuit, the higher ampacity shall be permitted to be used beyond the point
of transition, a distance equal to ___ mm or ___ percent of the circuit length
figured at the higher ampacity, whichever is less

Where the number of
current-carrying conductors in a raceway or cable exceeds three, or where
single conductors or multiconductor cables are stacked or bundled longer than
___ mm without maintaining spacing and are not installed in raceways, the
allowable ampacity of each conductor shall be reduced as shown in Table
3.10.1.15(b)(2)(a). Each current-carrying conductor of a paralleled set of
conductors shall be counted as a current-carrying conductor

Exception No. 3: Derating factors shall not apply to conductors in
nipples having a length not exceeding ___ mm

Exception No. 4: Derating factors shall not apply to underground
conductors entering or leaving an outdoor trench if those conductors have
physical protection in the form of rigid metal conduit, intermediate metal
conduit, or rigid nonmetallic conduit having a length not exceeding ___ mm
and if the number of conductors does not exceed ___

(Exception No. 5 cont.) A ___ percent adjustment factor shall be applied
where the current carrying conductors in these cables that are stacked or
bundled longer than ___ mm without maintaining spacing exceeds 20

The Adjustment factor for 8 conductors installed in a raceway is ___%

________. As used in
this Code, the heat transfer capability through a substance by conduction. It
is the reciprocal of thermal conductivity and is designated Rho and expressed
in the units °C-cm/watt.