Introduction to Electrical Engineering

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.............................1......1 Elements the Code and their meaning .. 27 5......1 Protection insulation live parts....................... 26 4........................................................................2.......... 32 5...................................................................................................................... 32 5..........1................................................................ Safety limits current passing through the human body....... 47 5............................ 45 5...........3................................................................... 47 5...............4.1..................................................................... 11 2......................... 41 5........... CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT .....1 Types system earthing.................................................................................7 Protective measures systems ........................ VALID TECHNICAL RULES ......................2.................2................................... IEC Basic Standards ..2 Examples designations with the Code...................2.........................................................................3 Protection use Class equipment equivalent insulation ...................... 26 4...... 12 2...................1.........2.....2.... 37 5................3 Protection obstacles........................ Protection against both direct and indirect contact.......1.......................2.......2.... 15 3................................................................1............... 21 4.................................... 42 5.......6 Protective measures systems .........................2............. 22/1997 (Technical Requirements for Products) .3..............................................................6 Additional protection... 31 5............. 26 4.............................................................................................. 12 2....2..... 73/2010 (important electrical equipment) ....................4 Supplementary equipotential bonding...................................... 56 6...........1................ 33 5..................................... 45 5............................1.......... 49 6...............................2.1 Classification electrical and electronic equipment with regard protection against electric shock the event insulation fault.....................3..........1.. The Act No.......................................................... 31 5.......... 50/1978 (qualification persons) ............. International and European standardization................................5 Protective measures system .............................................. Conventional touch voltage limit.........................1.................................................... 34 5.................. 43 5......... 43 5................................................. BASIC ELECTROTECHNICAL STANDARDS...............................................2..................................... Rules for installation electrical equipment (apparatus and appliances)....................... 57 ................................................... EFFECTS CURRENT PASSING THROUGH THE HUMAN BODY...................... Degrees protection provided enclosures (IP Code) ................... Notice No.4 Protection electrical separation....... ................1 Requirements for characteristics protective devices...... 30 5.......2................ 31 5......................2.................................. 7 1..............................................4 Protection placing live parts out reach ..............1...................................................................................2......2........................... 13 2...2 Protection automatic disconnection supply.........3 Main equipotential bonding .............2..... 36 5. 53 6............. Notice No............................................................................................5 Use protective measures................. Resistance (impedance) the human body ................. 51 6.....................................................................................1................1........... FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK .. 4 1............................2.....2 Measures for protection automatic disconnection supply. Principles ............................. General............................................. 17 4........ Protection against indirect contact.3.................... 7 1...........................................2 Protection barriers enclosures ............................ 3 CONTENTS ..................... 29 5..............1........... 51 6..................................2...............................2.........................2................................ 37 5........................................CONTENTS 4 CONTENTS PREFACE .. Protection against direct contact.......... BASIC TERMS AND DEFINITIONS FOR ELECTRICAL SAFETY AND ELECTRICAL INSTALLATIONS........................... 21 4................................................................2...............2............................................................ 10 1...

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