表 9-41 铜芯铜护套矿物绝缘电缆的载流量(θn=70℃、θn=30℃)
|
截 面 (mm2) |
500V 单芯 (A) |
500V多芯(A) |
250V多芯(A) |
截 面 (mm2) |
500V 单芯 (A) |
||||||||
|
2 |
3 |
4 |
7 |
1 |
2 |
3 |
4 |
7 |
|||||
|
1.0 |
|
|
|
|
|
22 |
17 |
14 |
15 |
10 |
35 |
180 |
|
|
1.5 |
|
24 |
20 |
20 |
14 |
27 |
22 |
16 |
19 |
13 |
50 |
225 |
|
|
2.5 |
|
32 |
27 |
26 |
19 |
36 |
29 |
|
|
|
70 |
275 |
|
|
4 |
|
41 |
35 |
34 |
|
46 |
38 |
|
|
|
95 |
330 |
|
|
6 |
63 |
53 |
45 |
44 |
|
|
|
|
|
|
120 |
380 |
|
|
10 |
85 |
71 |
61 |
59 |
|
|
|
|
|
|
150 |
440 |
|
|
16 |
110 |
94 |
81 |
78 |
|
|
|
|
|
|
|
|
|
|
25 |
150 |
124 |
110 |
105 |
|
|
|
|
|
|
|
|
|
注
θn为外护套温度。当在人不能触及处敷设时,θn允许温度90℃,相应载流量乘以1.22。