60364-5-56-1999 Installations Electriques Des Batiments - Partie 5: Choix Et Mise En Oeuvre Des Materiels Electriques - Chapitre 56: Services De Securite (Edition 1.1; Edition 1: 1980 Consolidated with Amendment 1: 1998)
Electrical Installations of Buildings - Part 5: Selection and Erection of Electrical Equipment - Chapter 56: Safety Services (Edition 1.1; Edition 1: 1980 Consolidated with Amendment 1: 1998)
Installations Electriques Des Batiments - Partie 5: Choix Et Mise En Oeuvre Des Materiels Electriques - Chapitre 56: Services De Securite (Edition 1.1; Edition 1: 1980 Consolidated with Amendment 1: 1998) 是非强制性国家标准，您可以免费下载前三页
GENERALFor safety services required to operate in fire conditions@ the following two conditions shall be fulfilled:?C?a safety source of supply shall be selected which will maintain a supply of adequate duration@ and?C all equipment shall be provided@ either by construction or by erection@ with protection ensuring fire resistance of adequate duration.?C?the safety source is generally additional to the normal source.NOTE - The normal source is@ for example@ the public supply network.Protective measures against electric shock in case of a fault without automatic disconnection at the first fault are preferred. In IT systems@ continuous insulation monitoring devices shall be provided which give an audible and visible indication of a first fault.Equipment shall be arranged to facilitate periodic inspection@ testing and maintenance.