NACOSS (NSI) is not a trade association. It is an independent regulatory body working to ensure that your security system (Intruder Alarms, CCTV or Access Control) is of the highest quality and reliability, and installed to comply with all the relevant European and British Standards, such as BS BN 50131 and PD6662 for Intruder Alarms, as well as with the security industry's own codes of practice.

NACOSS (NSI) recognition is only awarded to an installation company after rigorous checks on the firm applying for this status. The firm's technical expertise, business ability, quality management and company administration are all scrutinised.

NACOSS (NSI) requires all its recognised companies to have, or gain in two years, the international quality management standard BS EN ISO 9001: 2000. This means that those companies will design, install and maintain installations to consistently high standards of quality.

NACOSS (NSI) awards BS EN ISO 9001: 2000 certificates exclusively to firms in the electronic security industry. It is accredited to do this by the Department of Trade and Industry through the United Kingdom Accreditation Services (UKAS).

Your Insurance Company:-
For commercial premises, insurance companies now regularly insist on security systems which have been installed by NACOSS (NSI) recognised firms before they will provide insurance cover.

For domestic premises, insurance companies may now offer discounts to householders who have had an Intruder Alarm, CCTV or Access Control system installed by a NACOSS (NSI) recognised firm.

The Police:-
The police acknowledge that NACOSS (NSI) recognised firms comply with all the requirements set down in the Association of Chief Police Officers (ACPO) unified policy on intruder alarms. A security system installed by a NACOSS (NSI) recognised firm will thus be able to be connected to an Alarm Receiving Centre (ARC) to summon the police should the need arise.