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Switches for household and similar fixed electrical installations - Particular requirements. Switches and related accessories for use in home and building electronic systems (HBES) Ingestion-build-159183 This document investigates the stemmingWhat is BS EN 60669 2 5 HBES specifications about? Home and building electronic systems (HBES) are important accessories that functions to regulate the control of current flow throughout the circuit. BS EN 60669 2 5 is a part of IEC 60669 that applies to HBES switches with a working voltage not exceeding 250 V a. c. and a rated current up to and including 16 A for household and similar fixed electrical installations either indoors or outdoors and to