SN EN 60519-21 : 1998

1 Scope
2 Normative references
3 Definitions
4 Classification of electroheat equipment according to
    voltage bands
5 Classification of electroheat equipment according to
    frequency bands
6 General requirements
7 Prohibition of the use of earth as part of an active
    circuit
8 Marking, labelling and circuit diagrams
9 Protection against overcurrent
10 Isolation and switching
11 Connection to the supply network and internal connections
12 Protection against electric shock
13 Protection against thermal influences
14 Risk of fire and danger of explosion
15 Inspection, commissioning, utilization and maintenance of
    electroheat installations
Annex ZA Normative references to international publications with
their corresponding European publications