FOREWORD
1 Scope and object
2 Normative references
3 Terms and definitions
4 Classification of electroheat equipment according
to voltage bands
5 Classification of electroheat equipment according
to frequency bands
6 General requirements
6.7 Resistivity
6.8 Auxiliary equipment
6.9 Bare heating conductors
6.10 Leakage current
6.11 Vapours, precipitates and sediments from the
charge
6.12 Salt-bath furnaces and melting furnaces
6.13 Heating-up solidified contents of the bath
6.14 Vacuum furnaces
7 Isolation and switching
8 Connection to the supply network and internal
connections
9 Protection against electric shock
9.5 Protection against direct contact
9.6 Protection against direct and indirect contact
10 Protection against overcurrent
11 Equipotential bonding
12 Control circuits and control functions
13 Protection against thermal influences
13.6 Surface temperature of resistance heating
equipment
13.7 Special measures
13.8 Temperature safety devices
13.9 Nitrite and nitrate bath furnaces
14 Risk of fire and danger of explosion
14.1 Nitrite and nitrate bath furnaces
15 Marking, labelling and technical documentation
15.2 Labelling
15.3 Technical documentation
16 Information on inspection and commissioning and
instructions for utilization and maintenance of
electroheat installations
16.2 Information on inspection and commissioning
16.3 Instructions for utilization to be given in
the technical documentation
Annex ZA (normative) Normative references to
international publications with their
corresponding European publications