Internal Built-In Components - Stahl 8146/2 Serie Betriebsanleitung

5.3

Internal Built-In Components

Ascertaining the maximum number of conductors
Heat develops due to contact resistance at the terminal points and due to the
electric lines installed in the enclosure. In order to ensure that the maximum permissible
temperature of the enclosure is not exceeded, care should be taken that the current load
of the electric circuits in the enclosure does not exceed certain values.
5.3.1 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 8146/1061 as an example: The maximum permitted number of conductors
can be ascertained using the following table.
*) Current, **) Conductor cross-section
Explanations of the table:
Each inserted conductor and each internal connection conductor must be counted.
Jumpers and protective conductors are not considered conductors.
Non-critical area (light area of the table)
The light area is non-critical in terms of heating up the enclosure. Circuits classified as being
in this area can be incorporated in the enclosure in any number.
137189 / 8146619300
2020-02-24·BA00·III·en·09
Product Selection, Project Engineering and Modification
Terminal Boxes
Series 8146/1, Series 8146/2
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