Regarding protection devices for electrical circuits, in addition to traditional ones such as circuit breakers and fuses, residual differential dev...
Regarding protection devices for electrical circuits, in addition to traditional ones such as circuit breakers and fuses, residual differential devices (DRs) are also used. ABNT standards require the installation of these devices in various situations, whether for the protection of human beings or equipment. Regarding protection against electric shocks, a DR with what interruption capacity should be used by the standard?
A) 30mA
B) 300A
C) 300mA
D) 30A
A) 30mA
B) 300A
C) 300mA
D) 30A
💡 1 Resposta
Ed 
De acordo com as normas da ABNT, para a proteção contra choques elétricos, deve-se utilizar um dispositivo residual diferencial (DR) com capacidade de interrupção de 30mA. Portanto, a alternativa correta é A) 30mA.
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