【正文】 ............................... . 42 Functional bonding .............................................................................................. 45 Measures to limit the effects of high leakage current ............................................ 45 EN 602041:2020 – 4 – 9 Control circuits and control functions ............................................................................ 45 Control circuits ................................................................................................... . 45 Control functions ................................................................................................ . 46 Protective interlocks ........................................................................................... . 51 Control functions in the event of failure ................................................................ 52 10 Operator interface and machinemounted control devices ............................................. 56 General ............................................................................................................... 56 Pushbuttons ...................................................................................................... . 57 Indicator lights and displays................................................................................. 59 Illuminated pushbuttons...................................................................................... 60 Rotary control devices ......................................................................................... 60 Start devices ...................................................................................................... . 60 Emergency stop devices ...................................................................................... 60 Emergency switching off devices ......................................................................... 61 Enabling control device ....................................................................................... 62 11 Controlgear: location, mounting, and enclosures ........................................................... 62 General requirements .......................................................................................... 62 Location and mounting ........................................................................................ 62 Degrees of protection .......................................................................................... 64 Enclosures, doors and openings .......................................................................... 64 Access to controlgear .......................................................................................... 65 12 Conductors and cables ................................................................................................. 66 General requirements .......................................................................................... 66 Conductors.......................................................................................................... 66 Insulation ........................................................................................................... . 67 Currentcarrying capacity in normal service ......................................................... 67 Conductor and cable voltage drop........................................................................ 68 Flexible cables ............................................................................................... ..... 69 Conductor wires, conductor bars and slipring assemblies.................................... 70 13 Wiring practices .......................................................................................................... . 72 Connections and routing ...................................................................................... 72 Identification of conductors .................................................................................. 73 Wiring inside enclosures ..................................................................................... . 75 Wiring outside enclosures .................................................................................... 75 Ducts, connection boxes and other boxes ........................................................... . 78 14 Electric motors and associated equipment .................................................................... 80 General requirements .......................................................................................... 80 Motor enclosures ................................................................................................ . 81 Motor dimensions .......................................................... ...................................... 81 Motor mounting and partments ...................................................................... 81 Criteria for motor selection .................................................................................. 81 Protective devices for mechanical brakes ........................................................... . 82 15 Accessories and lighting .............................................................................................. . 82 Accessories........................................................................................................ . 82 Local lighting of the machine and equipment ....................................................... . 82 – 5 – EN 602041:2020 16 Marking, warning signs and reference designations ..................................................... . 83 General .............................................................................................................. . 83 Warning signs ................................................