Page 41.2 Certification Standards1.3 Special SymbolsThe following are examples of symbols used on the UPS or accessories to show you the important information:SafetyIEC 62040-1:2008IEC 60950-1:2005 (Modified)EMCConducted Emission: IEC 62040-2. Category C3Radiated Emission: IEC 62040-2. Category C3ESD:IEC 61000-4-2. Contact: Level 2, Air discharge: Level 3RS:IEC 61000-4-3. Level 3EFT:IEC/EN 61000-4-4. Level 4Surge:IEC/EN 61000-4-5. Level 4CS:IEC/EN 61000-4-6. Level 3MS:IEC/EN 61000-4-8. Level 3Voltage Dips, short interruptions and voltage variations:IEC/EN 61000-4-11Warning: This is a product for commercial and industrial application, in other environmentinstallation restrictions or additional measures may be needed to prevent disturbances. Additionalcurbs may be needed while output wiring length is more than 10m or communication wiring lengthis more than 3m.