A system must meet one of four security grades, depending on the level of risk. These roughly translate as follows:
Grade
G1. Low risk:
Not likely to be enforced in the UK as it covers DIY-style bells-only systems
G2. Medium risk:
This is first level that will be recognised by insurers and covers the majority of domestic & low value commercial premises. Required as a minimum for Police-calling systems
G3. Medium-high risk:
This covers most commercial & industrial premises, as well as high value domestic premises
NB G3 has to have a 5/6 digit EngCde
G4. High risk:
This is for high security applications, & roughly equates to the old BS7042 high security standard
It is the installer’s responsibility to ensure that a system of the correct grade is installed. This must be done via a properly documented Site Survey. Please see En50131-7 for more details on the Site Survey
G. 2,3 & 4 are professionally fitted grades, ANYTHING else is G1
Grade
G1. Low risk:
Not likely to be enforced in the UK as it covers DIY-style bells-only systems
G2. Medium risk:
This is first level that will be recognised by insurers and covers the majority of domestic & low value commercial premises. Required as a minimum for Police-calling systems
G3. Medium-high risk:
This covers most commercial & industrial premises, as well as high value domestic premises
NB G3 has to have a 5/6 digit EngCde
G4. High risk:
This is for high security applications, & roughly equates to the old BS7042 high security standard
It is the installer’s responsibility to ensure that a system of the correct grade is installed. This must be done via a properly documented Site Survey. Please see En50131-7 for more details on the Site Survey
G. 2,3 & 4 are professionally fitted grades, ANYTHING else is G1