Indoor use primarily to provide protection against contact with the enclosed equipment and against a limited amount of falling dirt.
CSA Type 1 (Canadian Standards Asc.)
General-purpose enclosure. Protects against accidental contact with live parts.
NEMA Type 1 (National Electrical Manufactures)
Enclosures are intended for indoor use primarily to provide a degree of protection against contact with the enclosed equipment or locations where unusual service conditions do not exist.
IEC 60529 (International Electrotechnical Commission)
IEC 60529:1989 Applies to the classification of degrees of protection provided by enclosures for electrical equipment with a rated voltage not exceeding 72,5 kV. It has the status of a horizontal standard in accordance with IEC Guide 104.
IP 20 (Index of Protection)
protected against solid objects up to 12mm(e.g. fingers)