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ESW > Electric wirings and Materials > Flashcards

Electric wirings and Materials Flashcards

1
Q

electrical conductors that are 8mm^2 - 18mm^2 or smaller

A

Wires

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2
Q

Larger than wires. Used for small and big industries, distribution lines, transmission lines

A

Cables

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3
Q

How many amperes can 3/0 gauge produce

A

200 amps

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4
Q

1/0 gauge =

A

150 amps

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5
Q

3 gauge =

A

100 amps

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6
Q

6 gauge

A

55 amps

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7
Q

8 gauge

A

40 amps

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8
Q

10 gauge =

A

30 amps

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9
Q

12 gauge

A

20 amps

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10
Q

14 gauge

A

15 amps

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11
Q

Wire color for positive (dc)

A

Red

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12
Q

Wire color for negative (dc)

A

black

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13
Q

Wire color for ground wire (dc)

A

white / grey

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14
Q

black wires in ac indicates

A

hot wire

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15
Q

red wires in ac indicates

A

220-volt installation

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16
Q

blue and yellow wires in ac indicates

A

blue - travellers for three or four way switches

yellow - switch legs for outlets fans / lights

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17
Q

white or grey wires in ac indicates

A

Neutral conductors which provides return path for current

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18
Q

Green, green with a rellow strip or bare copper

A

used as ground wires that keeps appliances and home safe from electrical fires

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19
Q

Most common types of wire

A

THHN, THWN, THW, XHHN

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20
Q

T Means

A

Thermoplastic insulation, fire resistant

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21
Q

H means

A

Heat resistant (167F)

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22
Q

HH highly heat

A

(194F)

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23
Q

W means

A

Wet” for damp and wet location

24
Q

X means

A

Insulation made of synthetic polymer

25
Q

N means

A

Nylon-coated

26
Q

Suplex stranded for temporary wire installation chords

27
Q

can be made of metal and non metal

A

Conduits or pipes

28
Q

Heavi - duty galvanized steel tubing that is installed with thread fittings

A

Rigid metal conduit

29
Q

A thinner, lighterweight version of rigid metal conduit. It is more common in construction

A

Intermediate metal conduit

30
Q

Mae of galvanized steel but can also be aluminum. It can also be called thin wall conduit. Can be bent with simple tool

A

Electrical metallic tubing

31
Q

A flexible corrugated plastic tubing that is moisture- resistant and flame retardant

A

Electrical non metallic tubing

32
Q

Sunlight resistant and are used Exposed, encased in concrete, concealed in walls and direct burial

A

Rigid pvc conduit

33
Q

A raceway that helps to porect wires and cables from heat, humidity, corrosion , water intrusion and general pysical threats

A

Surface raceways

34
Q

Most sections and fittings are completely open on one side so wires and cables can be laid in along an entire wireway

A

Wire raceway

35
Q

It is installed on or under the floor

A

Floor raceway

36
Q

connectors and fittings used to connect one piece of conduit to another

A

Conduit fittings

37
Q

Electrical materials used to hold and anchor electrical conduits in proper position

38
Q

Used to attatched metallic or non-metallic conduit to the junction or utility boxes

39
Q

A circuit protective device with feasible element that blows and cut the current

40
Q

Low cost electrical safety device that is used to protect electrical circuits and appliances.

A

Cartridge fuses

41
Q

An electromechanical device that performs the same protective function

A

Circuit Breaker

42
Q

howses all circuit breaker that connect with specific areas of house

43
Q

A device that acts as a convenient source of electrical energy for current consuming appliances

A

Convenience outlet

44
Q

Type of convenience outlet that can be portable

A

Surface type

45
Q

Type of convenience outlet that is placed on the wall

A

Flush type

46
Q

Devices that open or close that circuitry in electric circuit

47
Q

Two gang switches

A

Surface type

48
Q

Three gang switches

A

Flush type

49
Q

Device used to hold the light bulb

A

Lamp Holders

50
Q

Octagonal shaped electrical material where the connections or joints of wires are being done.

A

Junction box

51
Q

A rectangular shaped metallic or plastic material in which flush type convenience outlet and switch are attached

A

Utility box

52
Q

A metal box that is installed in an accessible place in a run of conduit to facilitate the pulling in of wires

53
Q

A device inserted into a convenience outlet to conduct electric current

A

Male plugs

54
Q

Used for wire protection and as electrical insulation to prevent people from getting electric shock

55
Q

Connectors that terminate a single wire and connect it to a circuit or other system

A

Terminal Block

56
Q

Also known as wire nuts, wire connectors, cone connectors, or thimble connectors. It is a type of electrical connector that used to fasten 2 or more low voltage

A

Twist -on wire connector

57
Q

It is a shrinkable plastic tube used to insulate wires, providing abrasion resistance and environmental protection for stranded and solid wire connection, conductors an terminals

A

Heat Shrink Tubing

ESW (4 decks)

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