This Emergency Voice Communication System label has been designed to satisfy the requirements of the British Standards as described below:
BS 5839-9:2021 Clause 13.1f)1) states…
Isolators and protective devices that can isolate the supply to the emergency voice communication system, other than the main isolator for the building and where in the case of a protective device that serves only the EVC circuit, but incorporates no switch, should be labelled “EMERGENCY VOICE COMMUNICATION SYSTEM”.