National Safety Instructionshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/National Safety Instructions - NSI 0: National Safety Instruction Indexhttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/0.htmNGUK/PM/ETSR/NSI/0 Issue 2201 December 2011National Safety Instructions - NSI 1: Operational and safety switchinghttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI1.htmNGUK/PM/ETSR/NSI/01 Issue 304 April 2011National Safety Instructions - NSI 2: Earthing high voltage equipmenthttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI2.htmNGUK/PM/ETSR/NSI/02/GN Issue 404 April 2011National Safety Instructions - NSI 3: High Voltage Metal Clad Switchgear with Spoutshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI3.htmNGUK/PM/ETSR/NSI/03/GN Issue 129 April 2011National Safety Instructions - NSI 4: Work on or near high voltage overhead lineshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI4.htmNGUK/PM/ETSR/NSI/04/GN Issue 404 April 2011National Safety Instructions - NSI 5: Cable systemshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI5.htmIssue 501 August 2005National Safety Instructions - NSI 6: Demarcation in substationshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI6.htmNGUK/PM/ETSR/NSI/06/GN Issue 204 April 2011National Safety Instructions - NSI 8: Mobile elevated work platforms, lorry loaders, vehicles, cranes and objects in substations guidance http://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/nsi8.htmNGUK/PM/ETSR/NSI/08/GN Issue 2 *04 April 2011National Safety Instructions - NSI 9: Testing high voltage equipmenthttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI9.htmNGUK/PM/ETSR/NSI/09/GN Issue 1 *31 January 2011National Safety Instructions - NSI 10: Equipment containing sulphur hexafluoride (Sf6)http://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI10.htmNGUK/PM/ETSR/NSI/10/GN Issue 2 *04 April 2011National Safety Instructions - NSI 11: High voltage static capacitor bankshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI11.htmNGUK/PM/ETSR/NSI/11/GN Issue 2 *04 April 2011National Safety Instructions - NSI 12: Low Voltage Equipment NGUK/PM/ETSR/NSI/12/GN http://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI12.htmIssue 101 December 2011National Safety Instructions - NSI 13: Washing high voltage insulatorshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI13.htmIssue 102 January 1995National Safety Instructions - NSI 14: Automatically and/or remotely controlled equipmenthttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI14.htmNGUK/PM/ETSR/NSI/14/GN Issue 101 September 2010National Safety Instructions - NSI 17: Pressure systemshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI17.htmNGUK/PM/ETSR/NSI/17/GN Issue 1*12 November 2010National Safety Instructions - NSI 24: Modification or Repair of Earth Conductors on Main Earth Systems NGUK/PM/ETSR/NSI/24/GNhttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI24.htmIssue 101 December 2011National Safety Instructions - NSI 30: Appointment of personshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI30.htmNGUK/PM/ETSR/NSI/30 Issue 804 April 2011National Safety Instructions - NSI 31: Approval of procedure for National Grid electricity safety ruleshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI31.htmIssue 101 July 2007National Safety Instructions - NSI 32: Register of approvalshttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI32.htmIssue 101 November 1995National Safety Instructions - NSI 33: The addition/removal of equipment to/from the systemhttp://nationalgrid.comhttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI33.htmIssue 601 February 2007