Apparatus, instruments and cables for electricity; electric control apparatus; surge boards; voltage surge protectors; lightning arrester equipment; varistors; measuring sensors; load break isolators; measuring devices, electric; inductors [electricity]; voltage limiters; transformers [electricity]; measuring, detecting and monitoring instruments, indicators and controllers; voltage monitoring units; connector sockets (electric -); data networks; ducts [electricity]; circuit distributors; power packs [transformers]; diagnostic apparatus, not for medical purposes; computer systems; energy regulators; apparatus for monitoring electrical energy consumption; signalling apparatus; process controlling apparatus [electronic]; railway traffic safety appliances; safety, security, protection and signalling devices; software; monitors [computer programs]; safety monitoring apparatus [electric]; computers and computer hardware.