National Safety Instructionshttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/National Safety Instructions - National Safety Instruction 0http://www.nationalgrid.com/uk/Electricity/Safety/NSI/0.htmNGUK/PM/ETSR/NSI/0 Issue 15 – Index02 February 2009National Safety Instructions - NSI 1: Operational and safety switchinghttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI1.htmIssue 1 *02 October 2009National Safety Instructions - NSI 2: Earthing high voltage equipmenthttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI2.htmIssue 2 *14 November 2008National Safety Instructions - National Safety Instruction 3http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI3.htmUK BP/SE/NSI3 - High Voltage Metalclad Switchgear with Spouts01 June 2005National Safety Instructions - NSI 4: Work on or near high voltage overhead lineshttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI4.htmIssue 2 *27 March 2009National Safety Instructions - National Safety Instruction 5http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI5.htmUK BP/SE/NSI5 - Cable Systems01 August 2005National Safety Instructions - NSI 6: Demarcation in substationshttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI6.htmIssue 1 *20 November 2009National Safety Instructions - NSI 8: Mobile elevated work platforms, lorry loaders, vehicles, cranes and objects in substations guidancehttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/nsi8.htmIssue 1 *27 March 2009National Safety Instructions - National Safety Instruction 9http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI9.htmUK BP/SE/NSI9 - Testing High Voltage Equipment03 January 2005National Safety Instructions - NSI 10: Equipment containing sulphur hexafluoride (SF6)http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI10.htmIssue 1 *10 July 2009National Safety Instructions - NSI 11: High voltage static capacitor bankshttp://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI11.htmIssue 1 *29 September 2008National Safety Instructions - National Safety Instruction 12http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI12.htmUK BP/SE/NSI12 - Low Voltage Equipment01 April 2004National Safety Instructions - National Safety Instruction 13http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI13.htmWashing High Voltage Insulators02 January 1995National Safety Instructions - National Safety Instruction 14http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI14.htmUK BP/SE/NSI14 - Automatically And/Or Remotely Controlled Equipment01 February 2005National Safety Instructions - National Safety Instruction 15http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI15.htmUK BP/SE/NSI15 - Brush Gear of High Voltage Rotating Machines01 July 2004National Safety Instructions - National Safety Instruction 17http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI17.htmUK BP/SE/NSI17 - Pressure Systems01 March 2005National Safety Instructions - National Safety Instruction 18http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI18.htmUK BP/SE/NSI18 - Hydrogen Filled Machines03 January 2005National Safety Instructions - National Safety Instruction 19http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI19.htmUK BP/SE/NSI19 - Overhead Travelling Cranes01 September 2004National Safety Instructions - National Safety Instruction 20http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI20.htmFire Protection Areas02 January 1995National Safety Instructions - National Safety Instruction 24http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI24.htmUK BP/SE/NSI24 - Earth Systems01 November 2005National Safety Instructions - National Safety Instruction 30http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI30.htmNGUK/PM/ETSR/NSI/30 Issue 6 – Appointment of persons 02 February 2009National Safety Instructions - National Safety Instruction 31http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI31.htmApproval Procedure01 November 1996National Safety Instructions - National Safety Instruction 32http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI32.htmRegister of Approvals01 November 1995National Safety Instructions - National Safety Instruction 33http://www.nationalgrid.com/uk/Electricity/Safety/NSI/NSI33.htmUK BP/SE/NSI33 - The Addition / Removal of Equipment To / From The System01 June 2005