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