Technical Info

Electrical Symbols

These symbols are for the assistance of architects, consultants, contractors, and builders. They are derived from BS3939 and those in common use in the Architectural and Electricity industry.



IP Reference Chart

In the latest standards SFS - EN 60529 4 1992 concerning the IP degrees of enclosure protection of electrical equipment there are some changes particularly with regard to the testing and identification of protection against liquids. Up to the degree 6 the protection is understood to also cover the lower protection degrees. In degrees higher than 6, each degree is to be tested separately and marked accordingly, e.g. IP67/IP66.





Ventilation Fan Size Guide



Lighting Lux Levels