Wiring regulations for low-tension installations (not exceeding 500V) = Veiligheidsvoorschriften voor laagspanningsinstallaties (Installatievoorschriften I).
Netherlands Electrotechnical Committee.
British Standards Institution.Technical Help to Exporters Section.
Hemel Hempstead : Technical Help to Exporters, British Standards Institution,
[1969]
Includes Supplementary clauses (NEN 71010) first published 1969.