2 Type wiring and methods installation
The choice the type wiring and the methods installation depend on:
− the nature the locations;
− the nature the walls other parts the building supporting the wiring;
− accessibility wiring persons and livestock;
− voltage;
− the electromechanical stress likely occur due short-circuits;
− ther stresses which the wiring can exposed during the erection the electrical
installation service. For the purpose safety necessary determine and design:
− the source emergency supply (nature, characteristics) and
− circuits supplied the emergency source.
With respect expected utilization the installation and the danger that may arise the
course its utilization, the installation shall divided into circuits.
6.
If great danger for human lives property may arise consequence interrupting of
the electrical supply (e. are determined by:
− location points power demand;
− loads expected the various circuits;
− daily and yearly variation demand;
− any special conditions;
− requirements for control, signaling, telecommunication, etc.
.
To protect persons well property against danger from electricity, the installation well
as the equipment used shall fulfill following conditions:
6.g.4.4.4 Selection electrical equipment
Every item electrical equipment used electrical installations shall comply with such
standards are appropriate.3 Nature demand
The number and type the circuits required for lighting, heating, power, control, signaling,
telecommunication, etc.4.1 Protection against thermal effects
The electrical installation shall arranged that there risk ignition flammable
materials due high temperature electric arc.CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT
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6.4. addition, during normal operation the
electrical equipment, there shall risk persons livestock suffering burns. hospitals, theaters), the installation shall equipped with
emergency supply.
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