Module 3 : Wiring Methods in Electrical Systems

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110 Terms

1

Open Wiring on Insulators

Exposed wiring using cleats and knobs.

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2

Concealed Knob-and-Tube

Wiring method using knobs and tubes, concealed.

<p>Wiring method using knobs and tubes, concealed.</p>
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3

Type AC Cable

Flexible metal enclosure for insulated conductors.

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4

Metal-Clad Cable (Type MC)

Insulated conductors in a metallic sheath.

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5

Armored Cable (Type AC)

Fabricated assembly of insulated conductors, flexible.

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6

Direct Burial

Cable installation underground, identified for use.

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7

Cable Tray

Support system for multiple cables in one area.

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8

Aerial Cable

Cable suspended on a messenger wire.

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9

Services, Feeders, Branch Circuits

Electrical distribution components in wiring systems.

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10

Power Circuits

Circuits designed to supply electrical power.

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11

Lighting Circuits

Circuits specifically for lighting fixtures.

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12

Control Circuits

Circuits for controlling electrical devices.

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13

Signal Circuits

Circuits for transmitting signals or communications.

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14

Exposed Wiring

Wiring not concealed within building structures.

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15

Concealed Wiring

Wiring hidden within walls or ceilings.

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16

Corrosive Vapors

Harmful gases that can damage wiring materials.

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17

Damp Locations

Areas with moisture but not wet conditions.

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18

Wet Locations

Areas subject to direct water exposure.

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19

Hazardous Locations

Areas with potential fire or explosion risks.

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20

Flexible Tubing

Protective covering for insulated conductors.

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21

Insulated Conductors

Wires coated to prevent electrical contact.

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22

Nominal Voltage

Standard voltage level, typically 600 volts.

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23

Masonry Walls

Walls made of brick or stone materials.

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24

Moisture-Impervious Jacket

Protective layer preventing moisture ingress.

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25

Metallic Sheathing

Metal covering providing physical protection to cables.

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26

Knobs and Tubes

Traditional wiring method using ceramic knobs.

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27

Fish Cable

Running cable through walls or ceilings.

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28

Type NM Cable

Not for multifamily dwellings over three floors.

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29

Type NMC Cable

Prohibited in hazardous classified locations.

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30

Type NMS Cable

Not allowed in places of assembly.

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31

Type MC Cable

Avoid in corrosive conditions like direct burial.

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32

Type MI Cable

Mineral-insulated, metal-sheathed cable for various uses.

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33

Type SNM Cable

Shielded nonmetallic-sheathed cable for moisture resistance.

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34

Service Entrance Cable

Single or multi-conductor for service applications.

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35

Type SE Cable

Flame-retardant, moisture-resistant service entrance cable.

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36

Type USE Cable

Permitted for service laterals above ground.

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37

Type TC Cable

Used for power, lighting, and control circuits.

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38

Type UF Cable

Underground feeder and branch circuit cables.

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39

Type FC Cable

Flat cable assemblies for direct burial.

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40

Corrosive Conditions

Includes exposure to strong chlorides and caustic alkalis.

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41

Mineral Insulation

Highly-compressed refractory mineral for conductor insulation.

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42

Liquidtight Sheath

Gastight covering for Type MI cable.

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43

Moisture Resistance

Protection against water and humidity exposure.

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44

Flame Resistance

Material that resists ignition and burning.

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45

Exposed Locations

Areas where cables are not concealed or protected.

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46

Concealed Locations

Cables installed within walls or ceilings.

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47

Direct Burial

Cables installed underground without additional protection.

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48

Branch Circuits

Circuits that extend from a distribution panel.

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49

Power Circuits

Circuits designed to deliver electrical power.

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50

Signal Circuits

Circuits used for communication signals.

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51

Cable Trays

Support structures for multiple cable runs.

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52

Raceways

Enclosed channels for electrical wiring.

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53

Physical Damage

Damage from external forces affecting cable integrity.

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54

Type UF Cables

Permitted for underground and interior wiring.

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55

Type FCC Cables

Flat copper conductors for branch circuits.

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56

Type TC Cables

Factory assembly of insulated conductors.

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57

Nonmetallic Extensions

Insulated conductors in nonmetallic jackets.

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58

Integrated Gas Spacer Cable

Aerial cable with supporting messenger integrated.

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59

Medium Voltage Cable

Rated 2001 volts or higher for power systems.

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60

Flat Conductor Cable

Three or more flat conductors placed edge-to-edge.

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61

Overcurrent Protection

Protection against exceeding rated ampacity.

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62

Cable Trays

Supports multiple conductors in a single assembly.

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63

Messenger-Supported Wiring

Wiring supported by a messenger wire.

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64

Direct Burial

Installation of cables directly in the ground.

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65

Service Entrance Cables

Cables used for electrical service entry.

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66

Hazardous Locations

Areas requiring special wiring considerations.

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67

Corrosive Vapors

Gases that can damage electrical components.

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68

Raceway

Enclosed channel for wires and cables.

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69

Branch Circuit

Circuit that supplies power to outlets.

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70

General Purpose Circuit

Circuit for general electrical use.

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71

Appliance Branch Circuit

Circuit dedicated to specific appliances.

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72

Aerial Cable

Cable installed above ground, often supported.

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73

Loose-Fit Nonmetallic Conduit

Flexible conduit for insulated conductors.

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74

Directly Buried Cables

Cables installed without additional protective covering.

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75

Voltage Rating

Maximum voltage a cable can safely carry.

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76

Corrosive Locations

Areas where materials can corrode wiring.

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77

Surface Extensions

Wiring extensions mounted directly on surfaces.

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78

Twisted Conductors

Conductors twisted together for stability.

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79

Factory-assembled Wiring

Wiring pre-assembled in a factory setting.

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80

Multi-Conductor Type

Cable with multiple conductors in one assembly.

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81

Cable Assemblies

Combination of multiple cables into one unit.

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82

Intermediate Metal Conduit (IMC)

Metal raceway with circular cross-section for conductors.

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83

Rigid Metal Conduit (RMC)

Specially constructed raceway for electrical conductor installation.

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84

Flexible Metallic Tubing (FMT)

Non-rigid conduit for drawing conductors post-installation.

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85

Electrical Metallic Tubing (EMT)

Thinner-walled metal conduit for concealed or exposed work.

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86

Rigid Nonmetallic Conduit

Nonmetallic conduit resistant to moisture and chemicals.

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87

Surface Metal Raceway (SMR)

Metal assembly for surface mounting of electrical conductors.

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88

Liquidtight Flexible Metal Conduit

Flexible metal raceway with liquidtight outer jacket.

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89

Surface Nonmetallic Raceway

Nonmetallic raceway for surface mounting, moisture-resistant.

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90

Busway

Assembled metal trough for bare conductors as feeders.

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91

Underfloor Raceway

Raceway type suitable for installation under flooring.

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92

Cable Tray

Structural system used to support electrical cables.

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93

Cable Bus

Assembly of insulated conductors in ventilated metal housing.

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94

Cellular Floor Raceway

Enclosed metal housing with hollow spaces for conductors.

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95

Multi-outlet Assembly

Surface flush raceway for conductors and receptacles.

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96

Messenger Wire

Support wire for insulated conductors in installations.

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97

Corrosion Protection

Measures to protect conduits from corrosive environments.

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98

Dissimilar Metals

Avoid contact to prevent galvanic corrosion in systems.

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99

Enamel Protection

Corrosion protection using enamel for ferrous raceways.

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100

Hazardous Locations

Areas requiring special conduit types for safety.

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