18th Edition Iet Wiring Regulations. Electric W... Here

: Protection against transient overvoltages is required where consequences could result in serious injury, failure of safety services (like fire alarms), or significant financial/data loss. For other cases, SPDs must be installed unless the owner specifically signs a declaration accepting the risk of equipment damage. Residual Current Devices (RCDs) :

Omitting an RCD via a risk assessment is now more restricted and generally not permitted in dwellings. Electricians Guide To The Building Regulations 18th Edition 18th edition IET wiring regulations. Electric w...

: AFDDs are now mandatory for single-phase AC final circuits supplying socket-outlets (up to 32A) in specific high-risk buildings: Higher Risk Residential Buildings (HRRBs). Houses in Multiple Occupation (HMOs). Purpose-built student accommodation and care homes. Electricians Guide To The Building Regulations 18th Edition

RCDs (30mA) are required for socket outlets (up to 32A) where they may be used by children, disabled persons, or in general-use domestic settings. RCDs (30mA) are required for socket outlets (up