My convector heater has a metal frame but has no earth wire – Is this normal?

Convector heaters are typically Class II appliances. This means they have double insulation. To confirm this there will be a symbol on the heater of a square within a square (see left). Double insulated or Class II electrical appliances are products that have been designed in a way so as not to require a safety connection to electrical earth. Class II insulation provides sufficient barrier to protect the user and are independently safety validated.