EN 50588-2 covers, in conjunction with EN 50588-1, transformers under iii) and iv) above, up to 36 kV (the data from 24 kV to 36 kV are under consideration) and for transformers with rated power less than or equal to 3150 kVA . Further documents exist which may be used by agreement between purchaser and manufacturer for cable boxes and enclosures. The dimensional requirements for cable boxes and protective enclosures are not enclosed in this document.