Information
Definition
Built-in overcurrent protection means the charger includes internal protection against excessive current under specified conditions. It is normally assessed during product selection, circuit design, installation verification and maintenance of EV charging equipment.
Why it matters
It affects whether additional external protective devices are still required and must be checked against manufacturer instructions and UK wiring design. 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.