50A மின்னோட்டத்தைச் சுமந்து செல்லும் தாமிரத்திற்குப் பொருத்தமான கம்பி எது?

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ALP CBT 2 Electrician Previous Paper: Held on 22 Jan 2019 Shift 3
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  1. 12 மிமீ2
  2. 16 மிமீ2
  3. 8 மிமீ2
  4. 4 மிமீ2

Answer (Detailed Solution Below)

Option 1 : 12 மிமீ2
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Detailed Solution

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கம்பி அளவு

ஆம்பியர் மதிப்பீடு 60° C (140 F)

ஆம்பியரில் (A)

ஆம்பியர் மதிப்பீடு  75° C ( 167 F)

ஆம்பியரில் (A)

AWG

மிமீ2

தாமிரம்

அலுமினியம்

தாமிரம்

அலுமினியம்

14

2.1

15

--

15

--

12

3.3

20

15

20

15

10

5.3

30

25

30

25

8

8.4

40

30

50

40

7

11.8

50

35

55

45

6

13.3

55

40

65

50

4

21.2

70

55

85

65

2

33.6

95

75

115

90

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