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 83 z 112

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c. 9.; - adequacy connection conductors; - accessibility for convenience operation and maintenance.2 Insulation resistance the electrical installation The insulation resistance shall measured: a) between live conductors taken turn two two; Note: practice, this measurement can only carried out during erection the installation before the connection the appliances.c. a. Testing The following tests shall carried out where relevant and should preferably made the following sequence: - continuity protective conductors and the main and supplementary equipotential bonding; - insulation resistance the electrical installation; - protection separation circuits; - automatic disconnection supply; - polarity test; - electric strength test; - functional tests. The test methods described this chapter are given reference methods; other methods are not precluded provided they give less valid results.3. 9.3.1 Continuity the protective conductors, including the main and supplementary equipotential bonding A continuity test shall made. During this measurement, phase and neutral conductors may connected together.3. . 2. Notes: TN-C systems, the PEN conductor considered part the earth. 9., and with minimum current 0.2 A.VERIFICATION ELECTRICAL EQUIPMENT AND INSTALLATION 84 - neutral and protective conductors identification; - presence diagrams, warning notices other similar information; - identification circuits, fuses, switches, terminals, etc. recommended that the test carried out with supply having no-load voltage d. b) between each live conductor and earth. In the event any test indicating failure comply, that test and any preceding test, the results which may have been influenced the fault indicated, shall repeated after the fault has been rectified