Complex sentence: UK electrical wiring is largely harmonised with the regulations in other European countries and the international IEC 60446 standard, however there are a number of specific national practices, habits and traditions that differ significantly from other countries, and which in some cases survived harmonisation.
Split into simpler sentences: UK electrical wiring standards are largely harmonised with the regulations in other European countries and the international IEC 60446 standard. However there are a number of specific national practices, habits and traditions that differ significantly from other countries, and which in some cases survived harmonisation.