AS 3439.4:2009 pdf free download – Low-voltage switchgear and controlgear assemblies
7.2.1 .1 The degree of protection provided by an ACS against contact with live parts, ingress of solid foreign bodies and liquid is indicated by the designation IP… according to IEC 60529. The degree of protection of all parts of the ACS shall be at least IP44, with all doors closed and all removable panels and cover plates fitted. Ventilation and drainage holes shall not reduce this degree of protection. NOTE In Spain wiring rules (RD 842/2002) require a minimum degree of protection of IP45 for enclosures, switchgear and controlgear, socket-outlets and other installation elements intended for outdoor construction sites. The degree of protection for an operating face inside a door shall be not less than IP21 provided that the door can be closed under all conditions of use. Where the door cannot be closed the degree of protection for the operating face shall be at least IP44.
7.2.1 .3 Unless otherwise specified, the degree of protection indicated by the manufacturer applies to the complete ACS, when it is installed in a working position in accordance with the manufacturer’s instructions (see also 7.1 .3.6). Socket-outlets not protected by the enclosure of the ACS shall have a degree of protection at least equivalent to IP44, both when the plug is removed or fully inserted.
7.2.1 .4 If the degree of protection of an internal part of the ACS differs from that of the main part, the manufacturer shall indicate separately the degree of protection presented by that part. EXAMPLE IP44 – operating face IP21 . This information may be shown in a catalogue or in operating instructions of the ACS or of the unit.
7.2.1 02 Supports and securing devices of ACS
Every ACS shall be fitted with supports enabling it to stand on a horizontal surface (e.g. feet or legs, articulated or not) and/or a system for fixing it to a vertical wall, attached to the enclosure or supporting framework. These various supports or securing devices shall be external to the enclosure but firmly attached to it. They shall be appropriate to the constructional features (weight, environment, etc.) and service characteristics of the ACS. All ACS shall be so designed as to minimize mechanical damage to components such as socket-outlets and any plugs connected to socket-outlets. The cable outlet shall be at a minimum distance from the ground compatible with the radius of curvature of the largest cable that may be connected to the ACS.
7.4.2.2.1 Replace by: All external surfaces shall present a degree of protection not less than that specified in 7.2.1 .1 . The distance between the mechanical means provided for protection and the live parts they protect shall be not less than the values specified for the clearances and creepage distances in 7.1 .2 unless these mechanical means are of insulating material.