Cameroon CAP Vocational Trades Practice Questions - Certificat D'Aptitude Professionnelle - CAP (Cameroon) Exam

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What is the primary safety function of a 30 mA high-sensitivity residual current device (Disjoncteur Différentiel à Haute Sensibilité — DDR 30 mA) in domestic and workshop electrical installations?

Protecting persons against electric shock from direct and indirect contact by cutting power when leakage current to earth reaches 30 mA Protecting electrical appliances against high transient overvoltages caused by lightning strikes Limiting the maximum continuous power consumption of the installation to prevent billing overruns Extinguishing electrical arcs caused by high-current short circuits between phase and neutral conductors

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Protecting persons against electric shock from direct and indirect contact by cutting power when leakage current to earth reaches 30 mA

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