Tag: NSI approved intruder alarm

The A to Z of Intruder Alarms (Part 2)

NACOSS – The National Approval Council for Security Services was the industry benchmark and regulatory body for security and fire alarm systems until it merged with ISI (Inspectorate of the Security Industry) in 2001 to form the NSI. NSI – The National Security Inspectorate united NACOSS and ISI under one roof and is the regulatory… Read more »