What is BS4737 Alarm Cable (Type 1, Type 2, Type 3)?
BS4737 is the British Standard that specifies requirements for PVC insulated and sheathed cables used in interconnecting wiring for intruder alarm systems. Released as BS4737-3.30:2015 on 28 February 2015, this standard has governed cables used in security and alarm systems installed in the United Kingdom since 1 April 2016.