INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 General requirements
4.1 General considerations
4.2 Selection of equipment
4.3 Electrical supply
4.4 Physical environment and operating conditions
4.5 Transportation and storage
4.6 Provisions for handling
4.7 Installation and operation
5 Incoming supply conductor terminations and devices for
disconnecting and switching off
5.1 Incoming supply conductor terminations
5.2 Terminal for connection to the external protective
earthing system
5.3 Supply disconnecting (isolating) device
5.4 Devices for switching off for prevention of
unexpected start-up
5.5 Devices for disconnecting electrical equipment
5.6 Protection against unauthorized, inadvertent
and/or mistaken connection
6 Protection against electric shock
6.1 General
6.2 Protection against direct contact
6.3 Protection against indirect contact
6.4 Protection by the use of PELV
7 Protection of equipment
7.1 General
7.2 Overcurrent protection
7.3 Overload protection of motors
7.4 Abnormal temperature protection
7.5 Protection against supply interruption or
voltage reduction and subsequent restoration
7.6 Motor overspeed protection
7.7 Earth fault/residual current protection
7.8 Phase sequence protection
7.9 Protection against overvoltages due to lightning
and to switching surges
8 Equipotential bonding
8.1 General
8.2 Protective bonding circuit
8.3 Bonding for operational purposes
9 Control circuits and control functions
9.1 Control circuits
9.2 Control functions
9.3 Protective interlocks
9.4 Control functions in the event of failure
10 Operator interface and machine-mounted control devices
10.1 General
10.2 Push-buttons
10.3 Indicator lights and displays
10.4 Illuminated push-buttons
10.5 Rotary control devices
10.6 Start devices
10.7 Devices for emergency stop
10.8 Devices for emergency switching off
10.9 Displays
11 Electronic equipment
11.1 General
11.2 Basic requirements
11.3 Programmable equipment
12 Controlgear: location, mounting and enclosures
12.1 General requirements
12.2 Location and mounting
12.3 Degrees of protection
12.4 Enclosures, doors and openings
12.5 Access to controlgear
13 Conductors and cables
13.1 General requirements
13.2 Conductors
13.3 Insulation
13.4 Current-carrying capacity in normal service
13.5 Conductor and cable voltage drop
13.6 Minimum cross-sectional area
13.7 Flexible cables
13.8 Collector wires, collector bars and slip-ring
assemblies
14 Wiring practices
14.1 Connections and routing
14.2 Identification of conductors
14.3 Wiring inside enclosures
14.4 Wiring outside enclosures
14.5 Ducts, connection boxes and other boxes
15 Electric motors and associated equipment
15.1 General requirements
15.2 Motor enclosures
15.3 Motor dimensions
15.4 Motor mounting and compartments
15.5 Criteria for motor selection
15.6 Protective devices for mechanical brakes
16 Accessories and lighting
16.1 Accessories
16.2 Local lighting of the machine and equipment
17 Marking, warning signs and reference designations
17.1 General
17.2 Warning signs
17.3 Functional identification
17.4 Marking of control equipment
17.5 Reference designations
18 Technical documentation
18.1 General
18.2 Information to be provided
18.3 Requirements applicable to all documentation
18.4 Basic information
18.5 Installation diagram
18.6 Block (system) diagrams and function diagrams
18.7 Circuit diagrams
18.8 Operating manual
18.9 Maintenance manual
18.10 Parts list
19 Testing and verification
19.1 General
19.2 Continuity of the protective bonding circuit
19.3 Insulation resistance tests
19.4 Voltage tests
19.5 Protection against residual voltages
19.6 Functional tests
19.7 Retesting
Figures
1 Block diagram of a typical manufacturing system
2 Block diagram of a typical machine
3 Example of equipotential bonding for electrical
equipment of a machine
Tables
1 Minimum cross-sectional area of the external protective
copper conductor
2 Colour-coding for push-button actuators and their
meanings
3 Colours for indicator lights and their meanings with
respect to the condition of the machine
4 Maximum allowable conductor temperatures under normal
and short-circuit conditions
5 Current carrying capacity of PVC insulated copper
conductors or cables under steady-state conditions in
an ambient air temperature of +40 deg C for different
methods of installation
6 Minimum cross-sectional areas of copper conductors
7 Derating factors for cables wound on drums
8 Minimum permitted bending radii for the forced guiding
of flexible cables
9 Verification of continuity of the protective bonding
circuit
Annexes
A Examples of machines covered by this part of IEC 60204
B Inquiry form for the electrical equipment of machines
C Current-carrying capability and overcurrent protection
of conductors and cables in the electrical equipment
of machines
D Explanation of emergency operation functions
E Bibliography
ZA Normative references to international publications with
their corresponding European publications
Index