Permissible currents and electrical protection
Low Voltage Electrical installations
Article REF: D5046 V1
Permissible currents and electrical protection
Low Voltage Electrical installations

Author : Dominique SERRE

Publication date: February 10, 2007 | Lire en français

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2. Permissible currents and electrical protection

2.1 Permissible currents for conductors and cables

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2.1.1 Principle

The admissible current (I z ) is defined as the maximum value of current that can permanently flow through a conductor, under given conditions, without the steady-state temperature exceeding a specified value.

This definition shows that the value of the admissible current depends essentially on the following factors :

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