Grid Code documentshttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/Complete Grid Code - Complete Grid Codehttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/complete/Complete+Grid+Code.htm23 June 2009Contents - PREFACE (which does not form part of the Grid Code)http://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/Contents/PREFACE_i3r12.htm05 October 2005Contents - Glossary and Definitionshttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/Contents/Glossary++Definitions.htm23 May 2006Contents - Connection Conditionshttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/Contents/connectionconditions.htm11 October 2005Contents - Planning Code http://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/Contents/Planning+Code.htm23 June 2009Operating Codes (OC) - OC1 Demand Forecastshttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC1_i3r12.htm05 October 2005Operating Codes (OC) - OC2 Operational Planning and Data Provisionhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC2_i3r12.htm05 October 2005Operating Codes (OC) - OC5 Testing and Monitoringhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC5_i3r12.htm05 October 2005Operating Codes (OC) - OC6 Demand Controlhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC6_i3r12.htm05 October 2005Operating Codes (OC) - OC7 Operational Liaisonhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC7_i3r12.htm05 October 2005Operating Codes (OC) - OC8 Safety Co-ordinationhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC8_i3r12.htm05 October 2005Operating Codes (OC) - OC9 Contingency Planninghttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC9_i3r12.htm05 October 2005Operating Codes (OC) - OC10 Event Information Supplyhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC10_i3r12.htm05 October 2005Operating Codes (OC) - OC11 Numbering and Nomenclature of HV Apparatus at Certain Siteshttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC11_i3r12.htm05 October 2005Operating Codes (OC) - OC12 System Testshttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/oc/OC12__i3r12.htm05 October 2005Balancing Codes (BC) - BC1 Pre Gate Closure Processhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/BC1.htm23 May 2006Balancing Codes (BC) - BC2 Post Gate Closure Processhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/BC2+Post+Gate+Closure+Process.htm23 May 2006Balancing Codes (BC) - BC3 Frequency Control Processhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/BC3_i3r12.htm05 October 2005Balancing Codes (BC) - DATA REGISTRATION CODEhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/DRC_i3r12.htm05 October 2005Balancing Codes (BC) - DATA REGISTRATION CODEhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/DRC_i3r12.htm05 October 2005Balancing Codes (BC) - GENERAL CONDITIONShttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/GC_General_Conditions_i3r12.htm05 October 2005Balancing Codes (BC) - REVISIONS (which does not form part of the Grid Code)http://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/revisions.htm23 May 2006Balancing Codes (BC) - Constitution and Rules of the Grid Code Review Panelhttp://www.nationalgrid.com/uk/Electricity/Codes/gridcode/gridcodedocs/bc/Rules+of+the+Grid.htm08 August 2006