According to IEC 60479, considered the most complete study on the effects of electric current in the human body, there are two different situations related to electric shock: the ones related to direct contact and the ones related to indirect contact. Brazilian standard NBR 5410 states that “direct contact refers to contact with live parts, this being parts which have voltage applied to them during operation” for instance if a person accidentally touches the pins of an electric plug while removing it from the outlet; or someone that touches the feeders on a distribution panel. The standard defines indirect contact as “contact with exposed conductive parts that are live under fault conditions, including contact by any thing being carried or worn by that person”The residual current circuit-breakers RDs are devices used to protect people and installations against direct and indirect contact. Protects against the effects of earth-leakage that may exist on electric circuits..

According to IEC 60479, considered the most complete study on the effects of electric current in the human body, there are two different situations related to electric shock: the ones related to direct contact and the ones related to indirect contact. Brazilian standard NBR 5410 states that “direct contact refers to contact with live parts, this being parts which have voltage applied to them during operation” for instance if a person accidentally touches the pins of an electric plug while removing it from the outlet; or someone that touches the feeders on a distribution panel. The standard defines indirect contact as “contact with exposed conductive parts that are live under fault conditions, including contact by any thing being carried or worn by that person”The residual current circuit-breakers RDs are devices used to protect people and installations against direct and indirect contact. Protects against the effects of earth-leakage that may exist on electric circuits..