Ampacity Ratings

 

AMPACITY RATINGS

CURRENT CARRYING CAPACITY TABLE

BASE TEMPERATURE AT 40 C

TGGT
250 C "A" Nickel

MG
450 C "A" Nickel

24

4

4.3

22

5

5.6

20

7

8

18

9.4

11

16

12

14

14

18

21

12

25

26

10

34

35

8

43

49

6

55

65

4

69

76

3

78

85

2

90

99

1

101

110

1/0

114

126

2/0

128

141

3/0

144

159

4/0

169

186

250

187

--

300

212

--

350

236

--

400

254

--

500

288

--


NOTE: For allowable ampacities for fixture wires used in fixtures, see Article 402 and Table 402.5 in 1996 National Electrical Code Handbook.