IEC 60670-21 Ed. 1.0 b:2004

This part of IEC 60670 applies to boxes, enclosures and parts of enclosures (hereafter called ""boxes"" and ""enclosures"") for electrical accessories with a rated voltage not exceeding 1 000 V a.c. and 1 500 V d.c. intended for household or similar fixed electrical installations, either indoors or outdoors. This part applies to boxes and enclosures with provision for suspension means