Construction, maintenance, installation, and repair of high voltage electrical equipment including switchyards, terminal stations, transmission lines, power transformers, capacitor banks, switchgear

Electrical and electronic apparatus and instruments, namely power supplies, battery chargers, electricity converters and inverters, frequency converters, alarms and indicators, electronic loads, plug packs, and parts and fittings for the same; including wall mountings for these goods in this class

Electric current rectifiers and rectifier equipment, included in this Class,