EN 1303 is a security rating . In Europe, the European Committee for Standardization (Comite European de Normalisation) (CEN) provides rating and testing systems for security devices.
An 8-digit code is used to state the level of compliance. Each digit corresponds to a category and how the lock cylinder responded to testing.
Digit 1 - Category of use
One category is identified:
- Grade 1: Keys shall resist a torque of 2.5Nm and still be usable. This is for use by people with a high incentive to exercise care and with a small chance of misuse.
Digit 2 – Durability
Three grades of durability classify cylinders as either grade 4, 5, or 6 based on the number of test cycles achieved.
- Grade 4: 25,000 cycles.
- Grade 5: 50,000 cycles.
- Grade 6: 100,000 cycles.
Digit 3 – Door mass
- Grade 0 - No requirement.
Digit 4 – Fire resistance
Cylinders are classified as either grade 0 , A or B.
- Grade 0: Not approved for use on fire/smoke door assemblies.
- Grade A: Cylinders shall be subjected to a smoke test in accordance with EN 1634-3 or materials for the parts of the cylinder responsible for preventing any leakage of smoke shall have a melting point not less than 840 °C.
- Grade B: Cylinders shall be fire tested in accordance with current fire test requirements of EN 1634-1 or EN 1634-2 or materials for the parts of the cylinder responsible for preventing the spread of fire shall have a melting point not less than 300 °C.
Digit 5 – Safety
- Grade 0 - No requirement.
Digit 6 – Corrosion and temperature resistance
Cylinders are classified as either grade 0, A, B or C:
- Grade 0: No corrosion or temperature requirement.
- Grade A: High corrosion resistance, no temperature requirement.
- Grade B: No corrosion requirement, temperature requirement between - 25 °C and + 65 °C.
- Grade C: high corrosion resistance, temperature requirement between - 25 °C and + 65 °C.
Note: No distinction is made between the inside and the outside of either the cylinder and/or the door. On completion of the test, the cylinder must operate using a maximum 1.5 Nm torque on the key at both - 25 °C and + 65 °C.
Digit 7 – Key Security
Cylinders are classified in grades 1 to 6, where 6 is the highest. The grade of security can differ from one side of a double cylinder to the other. The table below provides a summary of the main security requirements.
|Min number of effective differs||Number||100||300||15,000||30,000||30,000||100,000|
|Min number of movable detainers||Number||2||3||5||5||6||6|
|Max number of idential||%||100||70||60||60||60||50|
|Max number of identical adjacent steps||Number||-||2||2||2||2||2|
|Direct coding on key||-||-||-||No||No||No||No|
|Operation of security mechanism (interpassing) torque||Nm||1.5||1.5||1.5||1.5||1.5||1.5|
|Torque resistance of plug/cylinder||Nm||2.5||5||15||15||15||15|
Digit 8 – Attack resistance
Cylinders are classified grades 0 to D where D is the highest. The table below provides a summary of the main requirements.
|Resistance to drilling (net drilling time)||Minutes||-||3 to 5||5 to 10||3 to 5||5 to 10|
|Resistance to chisel attack (number of defined blows)||Number||-||40||40||30||40|
|Resistance to twisting attack (number of defined twists)||Number||-||20||30||20||30|
|Resistance to plug/cylinder extraction (force)||kN||-||-||-||10||15|
|minutes||-||-||-||5 to 15||5 to 15|
|Torque resistance of plug/cylinder (torque)||Nm||-||20||30||20||30|