The annual diesel generators (CERN safety network) tests of the Meyrin site, SPS, Prévessin, North Area, LHC1 to LHC8, and LHC1.8 are planned on Monday 9 January from 6:00 a.m. to 6:30 a.m. Electrical power cut of the networks Normal, General Services, Stable (18 kV, 3.3 kV, 400 V) on the Meyrin site, SPS, Prévessin, North Area, LHC1 to LHC8, and LHC 1.8. The EN-EL group recommends that you turn off all your critical equipment and computer equipment. For any further information, please refer to the "note de coupure".