Industry jargon

RCD

Also called: Residual Current Device A Residual Current Device, or RCD, detects an imbalance caused by current flowing outside the intended circuit and disconnects the supply when its operating threshold is reached. RCD protection is an important part of electric-shock protection in EV charging installations. Section 722 of BS 7671 contains specific RCD requirements for charging points. EVSE can also produce DC residual current, which affects the type of RCD and additional DC detection that may be required. The correct arrangement depends on the EVSE, the installation and upstream protection. Installer decisions should therefore follow the current BS 7671 requirements and the charging-equipment manufacturer's instructions.