Information
Definition
A modular RCD is a residual current device installed as a separate modular protective device, typically in a consumer unit or distribution board. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
Why it matters
It affects board space, protection coordination, installation design and how EV charger RCD requirements are met. For UK users, it supports safer specification decisions and reduces the risk of misunderstanding how a charger should be protected or installed.
References
Standards and regulations
BS 7671
BS 7671 is the UK national standard for electrical installations, covering the design, erection, inspection, testing and verification of low-voltage electrical systems. Section 722 contains specific requirements for supplies to electric vehicles.