202161 / 815060300020
2016-12-13·BA00·III·en·05
Product selection, project engineering and modification
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Terminal Box
Series 8150/1, Series 8150/2
5.4.1 Ascertain the number of conductors using the table from the EU Type Examination Certificate
Refer to the specifications in the EU Type Examination Certificate for the maximum
permitted number of conductors – in relation to the current load and conductor
cross-section.
Taking enclosure 8150/1-0250-0180-120 as an example: The maximum permitted number
of conductors can be ascertained using the following table.
12543E00
*) Current, **) conductor cross-section
Explanations of the table:
Each inserted conductor and each internal connection conductor must be selected.
Jumpers and protective conductors are not considered as conductors.
Noncritical (light area of the table)
The light area is noncritical in terms of heating up the enclosure. Circuits classified as being
in this area can be incorporated in the enclosure in any number.
Critical (inscribed area of the table)
The inscribed area of the table shows the maximum permissible number of conductors
considering the cross-section of the conductor and the continuous current loading.
When using this table, simultaneous factors and load factors may be accounted for.
Mixed arrangements with circuits of different cross-sections and currents are possible;
in this case the proportion of the loading from the individual circuits should be allowed for.
If a terminal box is fully loaded according to the critical area of the inscribed part of the table,
then any number of circuits from the noncritical, light area may be added.
8150/1-0250-0180-120
[A]*
[mm²]**
1,5
20
16
10
6
25
35
50
63
80
100
125
160
200
225
250
315
400
500
63
21
42
163
9
24
47
11
26
51
7
20
50
3
16
41
5
19
68
7
21
76
9
20
8
20
7
18
56
15
48
2
9
19
4
11
24
2
7
14
3
9
28
5
2,5
4
6
10
16
25
35
35
50
70
95
120
150
185
240
300
