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Article | REF: R1040 V1

Electrical safety testers

Authors: André LECONTE, Bernard KANTOROWSKI

Publication date: December 10, 2004

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1. Electrical hazards

1.1 Physiological effects of electric current

The physiological effects of electric current are described in IEC 479 as a function of the current flowing through the human body and are classified as follows for power-frequency currents:

• perception threshold: 0.5 mA ;

• no-release" threshold: approx. 10 mA ;

• ventricular fibrillation threshold: largely dependent on the time taken for the current to flow, with the following orders of magnitude :

  • 30 ms : 500 mA ;

  • 50 ms : 300 mA ;

  • 1 s : 30 mA.

To this should be added a weighting coefficient based on the path taken...

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