Introduction to Electrical Engineering

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Pro: ČEKO IMPORT a.s.
Vydal: České vysoké učení technické Praha Autor: Vladimír Kůla, Michal Kříž

Strana 60 z 112

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CONSTRUCTION ELECTRICAL INSTALLATION AND EQUIPMENT 61 − where electrical monitoring earth-continuity used, the operating coils shall not be inserted protective conductors. situated the outer surface the exposed conductive part equipment and used for connection with exposed constructive parts other equipment and with extraneous conductive parts. .4. Proper installation electrical equipment As for the danger excessive temperatures, following measures shall carried out. Conductive connection these parts the separate protective conductor represents equipotential bonding (main supplementary). The inward protective terminal situated close the phase terminals and determined for the protective conductor, which the part the supply cable. The separable terminal for connecting the protective conductor the exposed conductive part made screw terminal. The reliability conductive connection between the main part the equipment and the separable part the equipment (lids doors) shall not influenced ageing deformation of packing between both parts. One part separable terminals shall made corrosion resisting material, preferably brass. All exposed conductive parts electrical equipment mounted stage shall durably and reliably connected the terminal for protective conductor. According the way connecting protective conductors there are: − separable terminals, − inseparable terminals. The outward protective terminal determined for the connection separate protective conductor for equipotential bonding.3. 6. For screw terminals determined for higher values current than the springy element shall used.3 Terminals for protective conductors According the purposes connection protective conductors can distinguish: − inward terminals, − outward terminals. A washer ring shall inserted into the screw terminal for carrying over the contact pressure effecting the conductor. Inseparable terminals could made soldering, welding moulding. 6. reliably conductively connected the exposed conductive part the supplied appliance equipment