Dobbeltisolert

Dobbeltisolert refers to a safety classification for electrical equipment. It indicates that the appliance has a higher level of protection against electric shock than standard single-insulated equipment. This enhanced safety is achieved through a system of double insulation, which typically involves both basic insulation and supplementary insulation. Basic insulation is the primary protection against electric shock, while supplementary insulation is an independent layer of insulation added in case the basic insulation fails.

Appliances designated as dobbeltisolert do not require a protective earth connection. This is because the double insulation provides sufficient safety, making an earth wire unnecessary. Such equipment is often identified by a symbol consisting of two concentric squares, indicating Class II protection. This design is particularly common in portable hand-held tools, kitchen appliances, and other electrical devices where the user might come into direct contact with the casing. The absence of an earth wire simplifies the design and use of these appliances.