7. Cable and insulated wire safety requirements—Part 4: Defining voltage and current capacities
Cables without a jacket may not be used as a substitute for a jacketed cable or as an extension cable. This also is the case for connecting Class 2 cables to equipment, unless the cables in the construction spec have been defined as cables for extra light duty in a fixed installation.
The corresponding VDE and HD regulations shall be observed for the cables used in mining operations, quarrying, and equipment e.g. cranes with spring-loaded reeling devices.
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