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 30 z 112

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1.1 Protection insulation live parts Live parts shall completely covered with insulating materials which can only removed by destruction. Whenever necessary remove barriers or open enclosures this shall only possible: - the use key tool, or - after disconection the power supply live parts, restoration the supply being possible only after replacement reclosure the barriers enclosures, Figure 5.e. 5. 2X).FUNDAMENTAL RULES FOR PROTECTION AGAINST ELECTRIC SHOCK 31 - protection against unintentional contact (any contact) with live parts represented by: - protection insulation live parts, - protection barriers enclosures; - protection against intentional contact with live parts represented by: - protection obstacles; - protection placing out reach.2 Protection barriers enclosures With this measure, the live parts are located inside enclosures behind barriers.1.1 Protection against direct contact.1. Barriers and enclosures shall firmly secured. These enclosures barriers shall prevent the entrance solid object greater than and fingers (i. They prevent from any contact with live parts. Basic protection. . Protection insulation live parts, protection barriers and enclosure, - prevent any contact with live parts. Protection normal service. 5