UNE-HD 251.2S1:1978 (Ratificada)
Cocinas y calefactores eléctricos para uso domésticos y análogos (Ratificada por AENOR en enero de 1995.)
GENERAL SPECIFICATION FOR ELECTRIC COOKING AND HEATING APPLIANCES FOR HOUSEHOLD AND SIMILAR PURPOSES. (Endorsed by AENOR in January of 1995.)