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Home arrow FAQs arrow One-way Emergency Voice Comm arrow Does a Public Address System qualify as a One-way Emergency Voice Communication System
Does a Public Address System qualify as a One-way Emergency Voice Communication System

Public Address Systems are installed to meet user's need for either a paging system or back ground music (BGM) system. As such, it does not need to comply with SS546 (formerly CP25).

A One-way Emergency Voice Communication (EVC) System on the other hand is a mandatory requirement by the Fire Code. This requirement is determined by the occupancy class, habitable height, gross floor area and occupancy load. The Fire Code requires such systems to be designed, installed and maintained according to SS546 requirement as it is part of the fire safety system.

The main requirements of SS546 includes fault supervison, backup power supply, system sustainability during a fire, intelligibilty,standby amplifiers, zoning, event recording and minimum sound pressure level required. It also specifies the areas which are required to be provided with emergency voice communication coverage.