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Flashcards in PEC CHAPTER 3 WIRING METHODS AND MATERIALS Deck (107):
1

APPROVED TYPE OF WIRING METHOD BY P.E.C.

a) Conductors on Insulator Method: (2)

1. Open wiring on insulator - installed exposed*
2. Concealed knob and tube work - installed hidden by portion of the building*

2

APPROVED TYPE OF WIRING METHOD BY P.E.C.

b) Cable Wiring Method: (11)


1. Armored (BX) cable*
2. Metal-clad cable
3. Mineral insulated metal sheathed cable
4. Non-metallic sheathed cable
5. Shielded non-metallic sheathed cable
6. Service entrance cable
7. Underground feeder & branch circuit cable
8. Power and control tray cable
9. Flat conductor cable
10. Medium voltage cable
11. Integrated gas spacer cable

3

APPROVED TYPE OF WIRING METHOD BY P.E.C.

c) Raceway Method (20)

1. Intermediate metal conduit (IMC)*
2. Rigid metal conduit (RMC)*
3. Rigid non-metallic conduit (PVC)*
4. Electrical metallic tubing (EMT)*
5. Flexible metallic tubing (FMT)*
6. Liquid-tight flexible metallic tubing
7. Liquid-tight flexible non-metallic tubing
8. Metallic surface raceway*
9. Wooden surface raceway*
10. Non-metallic surface raceway*
11. Underfloor raceway
12. Cellular metal floor raceway
13. Cellular concrete floor raceway
14. Wireways*
15. Busways*
16. Cable trays*
17. Cablebus
18. Flexible metallic conduit*
19. Electrical non-metallic tubing
20. Multi-outlet assembly

4

APPROVED TYPE OF WIRING METHOD BY P.E.C.

* The most commonly used methods done by practitioners

Open wiring on insulator - installed exposed*
Concealed knob and tube work - installed hidden by portion of the building*
Armored (BX) cable*
Intermediate metal conduit (IMC)*
Rigid metal conduit (RMC)*
Rigid non-metallic conduit (PVC)*
Electrical metallic tubing (EMT)*
Flexible metallic tubing (FMT)*
Metallic surface raceway*
Wooden surface raceway*
Non-metallic surface raceway*
Wireways*
Busways*
Cable trays*
Flexible metallic conduit*
Open wiring on insulator - installed exposed*

5

WIRING METHODS

Conductors of Different Systems

a) 600 Volts, Nominal, or Less - ____ and _____shall be permitted to occupy the same equipment wiring enclosure, cable, or raceway. All conductors shall have an insulating rating equal at least the ________ applied to any conductor.

b) Over 600 Volts Nominal - Conductors rated over 600V, ____occupy the same equipment wiring enclosure, cable, or raceway unless permitted. The following listed are permitted to be in the same path:

1. Secondary wiring to electric-discharge lamps of 1000 volts or less.
2. Primary leads of electric-discharge lamp ballast.
3. Excitation, control, relay, and ammeter conductors used in individual motor or starter.
4. Motor, switchgear and control assemblies, and of similar equipment conductors.
5. In manholes, cond. of each system is permanently & effectively separated from other system.

AC circuit
DC conductors
maximum circuit voltage

shall not

6

WIRING METHODS

Protection against Physical Damage

- Either exposed and concealed locations, installed in joists, rafters, or wood members. Holes must not less than ___(mm) of the nearest edge. Screw penetrations, nails by a steel plate or bushing shall be at least ___ (mm) thick.

a) Cable and Raceways Through Wood Members
1. Bored Holes
2. Notches in Wood

b) Nonmetallic-Sheathed Cables, Electrical Nonmetallic Tubing through Metal Framing Members
1. Nonmetallic-Sheathed Cable - protected by listed bushing, grommets covering all metal edges.
2. Nonmetallic-Sheathed Cable and Electrical Nonmetallic Tubing

c) Cables Through Spaces Behind Panels Designed to Allow Access

d) Cables and Raceways Parallel to Framing Members and Furring Strips

e) Cables and Raceways Installed in Shallow Grooves

f) Insulated Fittings - Raceways containing ungrounded conductors 22 mm2 or larger enter a cabinet, enclosure, or raceway, protected by substantial fitting with a smoothly rounded insulating surface.

30 mm
1.60 mm


7

WIRING METHODS

Protection against Physical Damage

a) Cable and Raceways Through Wood Members

1. Bored Holes
2. Notches in Wood

8

WIRING METHODS

Protection against Physical Damage

b) Nonmetallic-Sheathed Cables, Electrical
Nonmetallic Tubing through Metal Framing Members

__________ - protected by listed bushing, grommets covering all metal edges. and Electrical Nonmetallic Tubing

Nonmetallic-Sheathed Cable

9

WIRING METHODS

Protection against Physical Damage

Insulated Fittings - Raceways containing _____ conductors _______(mm2) or larger enter a cabinet, enclosure, or raceway, protected by substantial fitting with a smoothly rounded insulating surface.

ungrounded

22 mm2

10

WIRING METHODS

Mechanical and Electrical Continuity - Conductors

 Conductors in raceways shall be continuous between outlets, boxes, devices, and so forth. There _____ splice or tap within a raceway unless permitted.

 In multiwire branch circuits, the continuity of a grounded conductor __________ on device connections such as lampholders, receptacles, and so forth, where the removal of such devices would interrupt the continuity.

shall be no

shall not depend

11

WIRING METHODS

Length of Free Conductors at Outlets, Junctions, and Switch Points

- At least ____(mm) of free conductor from the point in the box to the raceway or cable sheath at each outlet, junction, and switch point for splices.

150 mm

12

WIRING METHODS

Wiring in Ducts, Plenums, and Other Air-Handling Spaces

- The following are listed types of material that are permitted for wirings in ducts, plenums, air-handling spaces:

1. Type MI cable, Type MC cable without non-metallic covering.
2. EMT, FMT, IMC, or RMC without non-metallic covering.

13

WIRING METHODS

Panels Designed to Allow Access

- Cables, raceways, and equipment installed _____panels designed to allow access, including suspended ceiling panels, shall be arranged and secured so as to allow the ______ of panels and ____ to the equipment.

behind

removal

access

14

WIRING METHODS

Requirements for Over 600 Volts, Nominal Conductor Bending Radius:

Nonshielded Conductors - The bending radius shall not be less than _____ the overall diameter.

8 times



15

WIRING METHODS

Requirements for Over 600 Volts, Nominal Conductor Bending Radius:

Shielded or Lead Covered Conductor - The bending radius shall be _______ the overall diameter.

12 times

16

WIRING METHODS

Requirements for Over 600 Volts, Nominal Conductor Bending Radius:

Multiconductor or Multiplexed Single Conductor - ______ the diameter of individual conductor or ____ the overall diameter, whichever is greater.

12 times
7 times

17

CONDUCTORS FOR GENERAL WIRING

Stranded Conductors

- The conductors installed in raceways, size _____(mm2) and larger shall be stranded.

8.0 mm2

18

CONDUCTORS FOR GENERAL WIRING

Conductors in Parallel

- Conductors that are ____(mm2) and larger (aluminum, copper-clad aluminum, copper) are permitted to be in parallel. Parallel conductors in each phase, polarity, neutral/grounded circuit conductors shall comply with the ff:

1. Be the same length
2. Have the same conductor material
3. Be the same cross sectional area of the conducting material
4. Have the same insulation type
5. Be terminated in the same manner

50 mm2

19

CONDUCTORS FOR GENERAL WIRING

Shielded

- Solid dielectric insulated conductors operated above ______V in permanent installations shall have an ozone resistant insulation and shall be shielded.

2000 volts

20

CONDUCTORS FOR GENERAL WIRING

Locations

a.) Insulated conductors and cables of any type can be used in _______.

b) Dry and Damp Locations - Insulated conductors and cables used in dry and damp locations shall be of Types (21)

c) Wet Locations - Conductors used in wet locations shall be:

d) Locations Exposed to Direct Sunlight - Insulated conductors or cables exposed to direct rays of the sun shall be of types that are _______.

dry locations


FEP, FEPB, MTW, PFA, RHH, RHW, RHW-2, SA, THHN, THW, THW-2, THHW,
THHW-2, THWN, THWN-2, TW, XHH, XHHW, XHHW-2, Z, or ZW

1. Moisture-impervious metal sheathed
2. Types MTW, RHW, RHW-2, TW, THW, THW-2, THHW, THHW-2, THWN, THWN-2,
XHHW, XHHW-2, ZW

sunlight resistant

21

CONDUCTORS FOR GENERAL WIRING

Marking

Required Information - All conductors and cables shall be marked with the following:

1. The maximum rated voltage.
2. Proper type of letter or letters.
3. The manufacturer’s name, trademark, or distinctive marking of manufacturer.
4. Size in millimeter square or millimeter diameter.
5. Cable assemblies where the neutral conductor is smaller than the ungrounded conductors.

22

CONDUCTORS FOR GENERAL WIRING

Marking

Method of Marking

Surface Marking - 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)_.

• Single-conductor and Multiconductor rubber and thermoplastic insulated wire
• Nonmetallic-sheathed cable
• Service-entrance cable
• Underground feeder and branch-circuit cable
• Tray cable
• Irrigation cable
• Power-limited tray cable
• Instrumentation tray cable

600 mm
1000 mm


23

CONDUCTORS FOR GENERAL WIRING

Marking

Method of Marking

Metal-covered multiconductor cables shall employ a _______.

marker tape

24

CONDUCTORS FOR GENERAL WIRING

Marking

Method of Marking

Tag Marking - Printed tag shall be attached to the coil, reel or carton for the following: (4)

• Mineral-insulated, metal-sheathed cable
• Switchboard wires
• Metal-covered, single-conductor cables
• Type AC cable

25

CONDUCTORS FOR GENERAL WIRING

Marking

Suffixes to Designate Number of Conductors - A type letter to indicate the number of conductors.

 ____- Two insulated conductors lay parallel with nonmetallic covering.

D

26

CONDUCTORS FOR GENERAL WIRING

Marking

Suffixes to Designate Number of Conductors - A type letter to indicate the number of conductors.


 ____- Assembly of two or more insulated conductors, twisted spirally with nonmetallic covering.

M

27

CONDUCTORS FOR GENERAL WIRING

Marking

Aluminum Conductor Material

- All aluminum alloy conductors shall be made of _________ electrical grade aluminum.

1. Solid Conductors - 8.0 mm2 (3.2 mm dia.), 5.5 mm2 (2.6 mm dia.), and 3.5 mm2 (2.0 mm dia.)

2. Stranded Conductors - 8.0 mm2 through 500 mm2 (Type RHH, RHW, XHHW, THW, THHW, THWN, THHN, service-entrance TYPE SE Style U and SE Style R)

AA-8000 series

28

CABINETS, CUTOUT BOXES, AND METER SOCKET ENCLOSURES

Installation (Surface Type Enclosures)

a) Damp Locations - Enclosures installed in damp locations shall _________ and shall be placed with at least ___m airspace from the wall or of a supporting surface.

b) Wet Locations - Enclosures installed in wet locations shall be ________ and shall be placed with at least ____m airspace from the wall or of a supporting surface.

c) Position in Wall - Enclosures shall be installed in ________(3). Cabinets shall be installed so that the front edge is not set back of the finished surface for more than ___m.

prevent moisture from entering
6 mm

weatherproof
6 mm

walls of concrete, tile, or other noncombustible material
6 mm

29

CABINETS, CUTOUT BOXES, AND METER SOCKET ENCLOSURES

Enclosures for Switches or Overcurrent Devices

1. Shall not be used as junction boxes, auxiliary gutters, or raceways for feeder conductors unless ______ is provided for this purpose.

2. The conductors shall not fill the wiring space at any cross section to more than ___%.

3. Taps shall not fill the wiring space at any cross section to more than ___%.

adequate space

40%

75%

30

CABINETS, CUTOUT BOXES, AND METER SOCKET ENCLOSURES

Construction Specifications (Cabinets, Cutout Boxes, and Meter Socket Enclosures)

a) Strength - The materials to be used shall have ample strength and rigidity to support the electrical components. If constructed of sheet steel, metal thickness shall not be less than ____(mm) uncoated.

b) Spacing - Spacings shall be _____ to provide ample room for the distribution of ________.

1.35 mm

sufficient
wires and cables


31

CABINETS, CUTOUT BOXES, AND METER SOCKET ENCLOSURES

Construction Specifications (Cabinets, Cutout Boxes, and Meter Socket Enclosures)

Spacing

1. Base - Airspace of at least _____(mm) between the base of the device and the wall of any cabinet.

2. Doors - There shall be airspace of at least ___(mm) between any live metal parts.

3. Live Parts - Airspace of at least ____(mm) between the walls, back, and gutter partition. Spacing shall be increased to at least ____(mm) for voltages of ______V, nominal.

1.60 mm

25 mm

13 mm
25 mm
251 to 600

32

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES


_____ shall not be used where conduits requires the use of locknuts/bushings on the side of the box.

Round boxes

33

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES


______Are permitted only with open wiring on insulators, concealed knob-and-tube wiring, cabled wiring methods with entirely nonmetallic sheaths, flexible cords, and non metallic raceways.

Nonmetallic Boxes

34

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES


__________ Capped-elbows and service-entrance elbows that enclose conductors 14 mm2 or smaller shall not contain splices, taps, or devices and have sufficient size to provide space.

Short -Radius Conduit Bodies

35

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Supports for Enclosures:

a) _________ - Enclosures surface mounted shall be rigidly and securely fastened in place.

b) Structural Mounting- Rigidly supported either by directly using a ___________(3)


Surface Mounting

metal, polymeric, or wood brace.

36

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Supports for Enclosures:

Structural Mounting (2)


1. Nails and Screws
2. Braces

37

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

________Can be supported by flexible cord or conduits with length of 450 mm.

Pendant Boxes

38

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

______ Shall be 6 mm of back or ends of the enclosure.

Nails and Screws

39

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Protected against corrosion and not less than 0.50 mm thick uncoated.

Metal Braces

40

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Cross section not less than 25 mm x 50 mm.

Wood Braces

41

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Must be identified to be suitable for use.

Polymeric Braces

42

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Enclosures shall be supported by clamps, anchors, or fittings


Mounting in Finished Surfaces

43

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

_______ shall not be more than ________cm3 size and has the enclosure fastened securely.

suspended ceilings

1650 cm3 in

44

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

 Framing Members - fastened to the framing members by _______(3)

bolts, screws, or rivets

45

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Raceway Supported Enclosure, Without Devices, Luminaires (Fixtures), or Lampholders

- Raceways shall not exceed ___cm3 in size. ___ or more conduits threaded wrench tight supports the enclosure. Each conduit shall be _____(mm) within the enclosure, or _____(mm) of the enclosure if on the same side.

1650 cm3

Two

900 mm

450 mm

46

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Raceway Supported Enclosures, with Devices, Luminaires (Fixtures), or Lampholders -

Raceway shall not exceed ______cm3 in size, and secured by wrench tight conduits________(mm) within of the enclosure.

1650 cm3

450 mm

47

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Enclosures in Concrete or Masonry - Enclosures shall be protected from _______ and securely _______.

corrosion
embedded

48

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Outlet Boxes

a) Depth of Outlet Boxes
 Internal depth - Not less than ____(mm).
 Boxes enclosing flush devices - Internal depth of not less than ___(mm).

13 mm

24 mm


.


49

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Outlet Boxes

b) Maximum Luminaire (Fixture) Weight - Outlet boxes shall be permitted to support ____ or less. A luminaire more than 23 kg shall be supported ___________

c) Boxes at Ceiling-Suspended (Paddle) Fan Outlets - Outlet boxes as the sole support of a ceiling- suspended (paddle) fan shall be listed. Outlets shall not support more than ___. Outlets designed to support fans weighing ___ or more, markings shall include the _______ to be supported.

23 kg (50lbs)

independently

50

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Outlet Boxes

c) Boxes at Ceiling-Suspended (Paddle) Fan Outlets - Outlet boxes as the sole support of a ceiling- suspended (paddle) fan shall be listed. Outlets shall not support more than ___kg. Outlets designed to support fans weighing ___kg or more, markings shall include the _______ to be supported.

32 kg

16 kg

maximum weight

51

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Pull and Junction Boxes and Conduit Bodies

1. Straight Pulls - The length of the box shall not be less than __ the raceway size of the largest raceway.

2. Angle or U Pulls - The distance between each raceway entry inside the box and the opposite wall of the box shall not be less than ___ the raceway size of the largest raceway in a row.

8 times

6 times

52

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Metal Boxes, Conduit Bodies, and Fittings

__________ - Well-galvanized, enameled, properly coated inside and out to prevent corrosion.

b) Thickness of Metal
 Sheet steel boxes not over ______cm3 shall be made from steel not less than ____(mm) thick

 The wall of malleable iron box/conduit body and a die-cast or permanent-mold cast aluminum, brass, bronze, or zinc box or conduit body shall not be less than _____(mm) thick.

 Other cast metal boxes or conduit bodies shall have a wall thickness not less than ___(mm).

Corrosion Resistant

1650 cm3
1.60 mm

2.40 mm

3 mm

53

OUTLET, DEVICE, PULL, AND JUNCTION BOXES; CONDUIT BODIES; FITTINGS; AND HANDHOLE ENCLOSURES

Pull and Junction Boxes for Use on Systems Over 600 Volts, Nominal

1. Straight Pulls - The length of the box shall not be less than ____ the outside diameter, over sheath, of the largest shielded or lead-covered conductor or cable entering the box.

2. For Angle or U Pulls - The distance between each cable and conductor shall not be less than ___ the outside diameter, over sheath, of the largest cable or conductor.



48 times

36 times

54

ARMORED CABLE: TYPE AC


 Thermal Insulation - 90°C (194°F); For Application usage 60°C (140°F)
 Bending Radius - The radius of the curve not less than 5 times the diameter.
 Securing - 300 mm within every outlet box, junction box, cabinet.
 Supporting - Horizontal run supported within 1400m intervals.

55

INTEGRATED GAS SPACER CABLE: TYPE IGS

 Bends - A run Type IGS shall not contain more than equivalent of four quarter bends. (360 bends)
 Fittings - The terminations and splices shall be suitable for maintaining gas pressure within the conduit. Valve and cap shall be provided to check the gas pressure or to inject gas into the conduit
 Conductors - Solid aluminum rods, lay parallel, consisting of 1 to 19 (13 mm diam. rods). The minimum size conductor size shall be 125 mm2, and the maximum size shall be 2375 mm2. (4750 kcmil)
 Insulation - Shall be dry kraft paper tapes and a pressurized sulfur hexafluoride (SF6). The nominal gas pressure shall be 138 kPA gauge.
 Conduit - The conduit shall be a medium density polyethylene identified as suitable for use with natural gas rated pipe in race size 50 mm, 80 mm, or 100 mm.

56

FLAT CABLE ASSEMBLIES: TYPE FC

 Construction - It consist of 2, 3, 4, or 5 conductors.
 Conductors - 5.5 mm2 (2.6 mm dia.) special stranded copper wires.
Securing and Supporting - Supported by special design features within surface metal raceways.
 Temperature Rating - The ratings shall be marked on the surface at intervals not exceeding 600 mm.
 Grounded Conductor - White or gray marking.

57

FLAT CONDUCTOR CABLE: TYPE FCC

Transition Assembly

 Voltage - Shall not exceed ____V and voltage between phase and ground conductors not exceed ____V
 Current - General-purpose and appliance branch circuits shall have ___A rating. And, individual branch circuits shall have ___ampere rating.

300V
150V.

20A
30

58

FLAT CONDUCTOR CABLE: TYPE FCC

Installation (shall be permitted on the following conditions):

a) ____ - Hard, sound, smooth, continuous floor surfaces made of concrete, ceramic/composition flooring.
b) _____ - Wall surfaces in surface metal raceways.
c) Damp Locations
d) Heated Floors - Shall be identified if in excess of ____(mm)
e) System Height - Exceeding ___(mm) shall be tapered or feathered at the edges to floor level.
f) Coverings - Covered with carpet squares not larger than ____(mm) square.

Floors

Walls

30°C

2.30 mm

900 mm

59

MEDIUM VOLTAGE CABLE: TYPE MV

A single or multiconductor solid dielectric insulated cable rated ___V or higher. Medium voltage cable shall be constructed with copper, aluminum, copper-clad aluminum conductors

2001V

60

SERVICE-ENTRANCE CABLE: TYPES SE AND USE

 Bending Radius - The radius of the curve of the inner edge shall not be less than ____ the diameter of the cable.

5 times

61

METAL-CLAD CABLE: TYPE MC

 Uses Permitted - Type MC cable shall be permitted as follows: (12)

1. For services, feeders, and branch circuits
2. For power, lighting, control, and signal circuits
3. Indoors or outdoors
4. Exposed or concealed
5. To be direct buried where identified for such use
6. In cable tray where identified for such use
7. In any raceway
8. As aerial cable on a messenger
9. In hazardous (classified) locations as permitted
10. In dry locations and embedded in plaster finish on brick except in damp or wet locations
11. In wet locations where any of the following conditions are met:
 Metallic covering is impervious to moisture
 A lead sheath or moisture-impervious jacket is provided under the metal covering
 The insulated conductors under the metallic covering are listed for use in wet locations
12. Where single-conductor cables are used all phase conductors and, where used, the neutral conductor shall be grouped together

62

METAL-CLAD CABLE: TYPE MC

 Uses Not Permitted - shall not be exposed to ______ conditions

(3)


corrosive

1. Where subject to physical damage
2. Direct burial in the earth
3. In concrete

63

METAL-CLAD CABLE: TYPE MC

 Bending Radius - The radius of the curve of the inner edge of bends shall not be less than the required:

 Smooth Sheath
• Cable not more than 19 mm dia. - _____ the external diameter
• Cable more than 19 mm but less than 40 mm dia. - _____ the external diameter
• Cable more than 40 mm dia. - _____ the external diameter
 Interlocked-Type Armor or Corrugated Sheath - _____ the external diameter
 Shielded Conductors - _____ the overall diameter of one of the individual conductors or _____ the overall diameter of the multiconductor cable, whichever is greater.

10 times

12 times

15 times

7 times

12 times, 7 times

64

METAL-CLAD CABLE: TYPE MC

 Securing - Unless otherwise provided, cables shall be secured at intervals not exceeding _____(mm). __ or fewer conductors sized no larger than ______(mm2)shall be secured within ______(mm).

1800 mm

4

5.5 mm2 (2.6 mm dia.)
300 mm

65

METAL-CLAD CABLE: TYPE MC

 Conductors - copper, aluminum, or copper-clad aluminum, solid or stranded. The minimum conductor size shall be _________AWG copper and _______(mm2) aluminum or copper-clad aluminum

18 AWG (0.75 mm2; 1.0 mm dia.)

3.5 mm2 (2.0 mm dia.)

66

MINERAL-INSULATED, METAL-SHEATHED CABLE: TYPE MI

 Conductors - (3)

Solid copper, nickel, or nickel-coated copper

67

MINERAL-INSULATED, METAL-SHEATHED CABLE: TYPE MI

 Uses Permitted - Type MI cable shall be permitted as follows: (11)

1. For services, feeders, and branch circuits
2. For power, lighting, control, and signal circuits
3. In dry, wet, or continuously moist locations
4. Indoors or outdoors
5. Where exposed or concealed
6. Where embedded in plaster, concrete, fill, or other masonry, whether above or below grade
7. In any hazardous (classified) location
8. Where exposed to oil and gasoline
9. Where exposed to corrosive conditions not deteriorating to its sheath
10. In underground runs where suitably protected against physical damage and corrosive conditions
11. In or attached to cable tray

68

MINERAL-INSULATED, METAL-SHEATHED CABLE: TYPE MI

 Uses Not Permitted (2)

1. Underground runs unless protected from physical damage, where necessary
2. Exposed to conditions that are destructive and corrosive to the metallic sheath

69

MINERAL-INSULATED, METAL-SHEATHED CABLE: TYPE MI

Bending Radius
 Cable more than 19 mm dia. -__the external diameter
 Cable greater than 19 mm but not more than 25 mm dia. - ___ the external diameter

 Securing - Cables shall be secured at intervals not exceeding ____(mm)

5 times

10 times

1800 mm

70

POWER AND CONTROL TRAY CABLE: TYPE TC

Uses Permitted - Type TC cable shall be permitted to be used as follows: (8)



1. For power, lighting, control, and signal circuits
2. In cable trays
3. In raceways
4. In outdoor locations supported by a messenger wire
5. For Class 1 circuits
6. For non-power-limited fire alarm circuits
7. In industrial establishments where there is regular maintenance and supervision.
8. Where installed in wet locations and shall be resistant to moisture and corrosive agents.

71

POWER AND CONTROL TRAY CABLE: TYPE TC

Uses Not Permitted - Type TC tray cable shall not be installed as follows: (4)

1. Exposed to physical damage
2. Installed outside a raceway or cable tray system, except as permitted.
3. Exposed to direct rays of the sun, unless identified as sunlight resistant.
4. Direct buried, unless identified for such use.

72

POWER AND CONTROL TRAY CABLE: TYPE TC

Bending Radius - Type TC cable without metal shielding, bending radius shall be as follows:

 25 mm or less in dia. cable - ___ the overall diameter
 Larger than 25 mm (1 in.) but not more than 50 mm dia. - _____ the overall diameter
 Larger than 50 mm in dia. - _____ the overall diameter

4 times

5 times

6 times

Type TC cables with metallic shielding shall have a minimum bending radius of not less than 12 times the cable overall diameter

73

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

Protection from Physical Damage - conductors shall be protected by intermediate metallic conduit (IMC), rigid metallic conduit (RMC), electrical metallic tubing (EMT), or _______.

Schedule 80 PVC

74

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

Bending Radius - The radius of the curve of the inner edge shall not be less than _____ the diameter of the cable.

5 times

75

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

Securing and Supporting - The conductors shall be secured by staples, cable ties, straps, hangers, or similar fittings at intervals not exceeding ______(mm) and within ______(mm) of every outlet box, junction box, cabinet, etc.

1400 mm

300 mm

76

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

___________ The conductor temperature insulation must be rated at 90°C

Conductor Insulation

77

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

 Sheath - The outer sheath of nonmetallic-sheathed cable shall comply with the ff: (3)


a) Type NM
b) Type NMC
c) Type NMS

78

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

_____Flame retardant and moisture resistant.

Type NM

79

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

__________Flame retardant, moisture resistant, fungus resistant, and corrosion resistant.

Type NMC

80

NONMETALLIC-SHEATHED CABLE: TYPES NM, NMC, AND NMS

_______ Flame retardant and moisture resistant. The sheath shall be applied so as to separate the power conductors from the communications and signaling conductors

Type NMS

81

UNDERGROUND FEEDER AND BRANCH-CIRCUIT CABLE: TYPE UF

Bending Radius - The radius of the curve of the inner edge shall not be less than _____ the diameter of the cable.

5 times

82

UNDERGROUND FEEDER AND BRANCH-CIRCUIT CABLE: TYPE UF

Conductors - The conductors shall be of sizes _______(mm2) copper or ________(mm2) aluminum or copper-clad aluminum through _______(mm2)

2.0 mm2 (1.6 mm dia.)

3.5 mm2 (2.0 mm dia.)

100 mm2

83

UNDERGROUND FEEDER AND BRANCH-CIRCUIT CABLE: TYPE UF

____The overall covering shall be flame retardant; moisture, fungus, and corrosion resistant; and suitable for direct burial in the earth.

Sheath

84

INTERMEDIATE METAL CONDUIT: TYPE IMC

Size

Minimum - IMC smaller than raceway size___(mm) shall not be used.

Maximum - IMC larger than raceway size ___(mm) shall not be used.

15 mm

100 mm

85

INTERMEDIATE METAL CONDUIT: TYPE IMC

Bends - Number in One Run - There shall not be more than _______ (360 degree total)

4 quarter bends

86

INTERMEDIATE METAL CONDUIT: TYPE IMC

All cut ends shall be ______ to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a taper of ______ shall be used.

reamed

1 in 16

87

INTERMEDIATE METAL CONDUIT: TYPE IMC

 Securing and Supporting
 Securely Fastened - ________(mm) within of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination.
 Supports - IMC shall be supported in accordance with one of the following:
• Conduits supported at intervals not exceeding _________(mm)
• Exposed vertical risers from industrial machinery or fixed equipment supported at intervals not exceeding ______(mm).
• Horizontal runs of IMC supported by openings through framing members at intervals not exceeding ________(mm) and securely fastened within _______.(mm)

900 mm

3000 mm

6000 mm

3000 mm, 900 mm

88

INTERMEDIATE METAL CONDUIT: TYPE IMC

Marking - Conduits shall be durably marked at least every ____(mm) with the letters IMC.

Standard Length - _______(mm) including an attached coupling and each end shall be threaded.

1500 mm

3000 mm

89

RIGID METAL CONDUIT: TYPE RMC

 Size
Minimum - smaller than ____(mm) shall not be used.
Maximum - larger than ____(mm) shall not be used.

Bends - Number in One Run - There shall not be more than ________. (360 degree total)

 Reaming and Threading - All cut ends shall be _____to remove rough edges. Where conduit is threaded in the field, a standard cutting die with a taper of _____ shall be used.

15 mm
150 mm

4 quarter bends

reamed
1 in 16

90


RIGID METAL CONDUIT: TYPE RMC

Securing and Supporting
 Securely Fastened - ____(mm) within of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination.
 Supports - RMC shall be supported in accordance with one of the following:
• Conduits supported at intervals not exceeding ______(mm).
• Exposed vertical risers from industrial machinery or fixed equipment supported at intervals not exceeding _______(mm).
• Horizontal runs of RMC supported by openings through framing members at intervals not exceeding ____(mm)_ and securely fastened within _______(mm).
 Marking - RMC shall be durably marked at least every ________(mm). Nonferrous conduit of corrosion- resistant material shall have suitable markings.
 Standard Length - _____(mm), including an attached coupling and each end shall be threaded. Longer or shorter lengths with or without coupling and threaded or unthreaded shall be permitted.

900 mm

3000 mm

6000 mm

3000 mm
900 mm

3000 mm

3000 mm

91

RIGID NONMETALLIC CONDUIT: TYPE RNC

Size
Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

All cut ends shall be ____ inside and outside to remove rough edges.

Securing and Supporting
Securely Fastened and Supported - _____(mm) within of each outlet, junction, and device box cabinet, conduit body. Fastened so that thermal expansion and contraction is permitted.

______(2) shall be provided to protect the wire from abrasion.

Marking - RNC shall be durably marked at least every ______.(mm)

15 mm
150 mm

trimmed

900 mm

Bushing or adapter

3000 mm

92

FLEXIBLE METAL CONDUIT: TYPE FMC

Size
Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

All cut ends shall be ____ inside and outside to remove rough edges.

Securing and Supporting
Securely Fastened and Supported - ______(mm) within of each outlet, junction, and device box cabinet, conduit body, and supported at intervals within ______(mm).

Couplings and Connectors - ________ shall not be used for concealed raceway.

15 mm
100 mm

trimmed


300mm
1400 mm

Angle connectors

93

LIQUIDTIGHT FLEXIBLE METAL CONDUIT: TYPE LFMC

Size
Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

All cut ends shall be ____ inside and outside to remove rough edges.

Securing and Supporting
Securely Fastened and Supported - ______(mm) within of each outlet, junction, and device box cabinet, conduit body, and supported at intervals within ______(mm).

Couplings and Connectors - ________ shall not be used for concealed raceway.

15 mm
100 mm

trimmed


300mm
1400 mm

Angle connectors

94

HIGH DENSITY POLYETHYLENE CONDUIT: TYPE HDPE CONDUIT

Size
Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

All cut ends shall be ____ inside and outside to remove rough edges.

_______(2) shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection.

Marking - HDPE shall be durably marked at least every ______(mm). Type of material shall also be included.

15 mm
100 mm

trimmed

Bushing or adapter

3000 mm

95

NONMETALLIC UNDERGROUND CONDUIT WITH CONDUCTORS: TYPE NUCC

Size
Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

All cut ends shall be ____ inside and outside to remove rough edges.

_______(2) shall be provided to protect the wire from abrasion unless the box, fitting, or enclosure design provides equivalent protection.

Marking - HDPE shall be durably marked at least every ______(mm). Type of material shall also be included.

15 mm
100 mm

trimmed

Bushing or adapter

3000 mm

96

LIQUIDTIGHT FLEXIBLE NONMETALLIC CONDUIT: TYPE LFNC

Size
Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___ (mm)shall not be used.

All cut ends shall be ____ inside and outside to remove rough edges.

Securing and Supporting
 Securely Fastened - At intervals not exceeding _______(mm) and within _____(mm)_.

Supports -
• Conduits exceeding _____ (mm)in length supported at intervals within ______(mm).
• Horizontal runs supported by openings through framing members at intervals not exceeding _____(mm) and securely fastened within _______(mm).

15 mm
100 mm

trimmed

900 mm
300 mm

1800 mm
900 mm

900 mm
300 mm

97

ELECTRICAL METALLIC TUBING: TYPE EMT

Size
Minimum - less than ___ (mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

All cut ends shall be ______ or otherwise finished to remove rough edges.

Threading - EMT ____ be threaded.

Securing and Supporting
Securely Fastened and Supported -______(mm) within of each outlet, junction, and device box cabinet, conduit body, and supported and fastened at intervals within ________(mm).

Marking - EMT shall be durably marked at least every ________(mm).

15 mm
100 mm

rimmed

shall not

900 mm
3000 mm

3000 mm

98

FLEXIBLE METALLIC TUBING: TYPE FMT

Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used.

15 mm
20 mm

99

ELECTRICAL NONMETALLIC TUBING: TYPE ENT

Minimum - less than ___(mm) shall not be used.
Maximum - larger than ___(mm) shall not be used

All cut ends shall be ____ inside and outside to remove rough edges.

Securing and Supporting
Securely Fastened and Supported - ____(mm) within of each outlet, junction, and device box cabinet, conduit body, and supported and fastened at intervals within _______(mm).

Construction - ENT shall be made of materials that do not exceed ______________(4) characteristics of rigid (non-plasticized) polyvinyl chloride
.
Marking - ENT shall be durably marked at least every _____(mm) including type, size, and quantity of conductors included.

15 mm
50 mm

trimmed

900 mm
900 mm

ignitability, flammability, smoke generation, and toxicity

3000 mm

100

AUXILIARY GUTTERS

Uses Not Permitted
To extend a greater distance than ______(mm) beyond the equipment that it supplements.

The total area of conductors shall not exceed ____ of the gutter.

Securing and Supporting
Sheet Metal Auxiliary Gutters - Shall be supported at intervals within ______(mm)

Nonmetallic Auxiliary Gutters - Shall be supported at intervals within ______(mm).

9000 mm

20%

1500mm.

900 mm

101

BUSWAYS

Uses Not Permitted
Working platforms of lighting and trolley busway less than ______(mm) above the floor.

Support - Busways shall be securely supported at intervals not exceeding _______(mm).

A dead end of a busway shall be ________.

Busway shall be _____


2400 mm

1500 mm

closed

grounded

102

CABLEBUS

Conductors shall have insulation rating of ____C or higher.

Conductors shall not be smaller than ___mm2.

Individual conductors in a cablebus shall be supported at intervals not greater than ____(mm) for horizontal runs and ______(mm) for vertical runs.

Support - Cable bus shall be securely supported at intervals not exceeding ________(mm).


75°C

50 mm2

900 mm
450 mm

3600 mm

103

CELLULAR FLOOR RACEWAYS (CONCRETE AND METAL)

Uses Not Permitted: (2)

Conductors shall not be larger than ___mm2.

Maximum Number of Conductors - The combined cross sectional area of all conductors or cables shall not exceed ______of the cross-sectional area of the cell or header

1. Where subject to corrosive vapors.
2. In commercial garages, other than for supplying ceiling outlets.

50 mm2

40 percent

104

WIREWAYS

________ Sheet metal troughs with hinged or removable covers for housing and protecting electric wires and cable and in which conductors are laid in place after the wireway.

Metal Wireways

105

WIREWAYS

________Flame retardant, nonmetallic troughs with removable covers for housing and protecting electric wires and cables in which conductors are laid in place after the wireway.


Nonmetallic Wireways

106

CONCEALED KNOB-AND-TUBE-WIRING

Clearances - _____(mm) between conductors and ____(mm) between the conductor and surface.

Supporting - Supported at intervals within ____(mm) and within ____(mm) of each side of tap.

75 mm
25 mm

1400 mm
150 mm

107

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