60204-1 IEC:2005 – 139 –
Table 6 – Examples of current-carrying capacity (I z) of PVC insulated copper conductors or cables under steady-state conditions in an ambient air temperature
of +40 °C for different methods of installation
Installation method (e D.1.2)
B1 B2 C E
Cross-ctional
area
mm2Current-carrying capacity I z for three pha circuits
A
0,75 1,0 1,5 2,5 4 6 10 16 25 35 50 70 95 120
8,6
10,3
13,5
18,3
24
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59
77
96
117
149
180
208
8,5
10,1
13,1
17,4
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30
40
54
70
86
103
130
156
179
9,8
11,7
15,2
21
28
36
50
66
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84
104
125
160
194
225
10,4
12,4
16,1
22
30
37
52
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70
88
110
133
171
207
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Electronic (pairs)
0,20 0,5 0,75 Not applicable
Not applicable
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4,3
7,5
9,0
4,4
虾怎么煮7,5
9,5
4,4
7,8
10
NOTE 1 The values of the current-carrying capacity of Table 6 are bad on:
– one symmetrical three-pha circuit for cross-ctional areas 0,75 mm2 and greater;
– one control circuit pair for cross-ctional areas between 0,2 mm2 and 0,75 mm2.
Where more loaded cables/pairs are installed, derate the values of Table 6 in accordance with Tables D.2 or D.3.
NOTE 2 For ambient temperatures other than 40 °C, correct the current-carrying capacities by using values given in Table D.1.
NOTE 3 The values are not applicable to flexible cables wound on drums (e 12.6.3).
NOTE 4 For the current-carrying capacities of other cables, e IEC 60364-5-52.
12.5 Conductor and cable voltage drop
The voltage drop from the point of supply to the load shall not exceed 5 % of the nominal voltage under normal operating conditions. In order to conform to this requirement, it can be necessary to u conductors having a larger cross-ctional area than that derived from Table 6.
