Ammeters; Connections for electric lines; Contacts, electric; Converters, electric; Couplings, electric; Electrical adapters; Measuring apparatus, namely, clamp meters for measuring electricity; Resistance measuring instruments; Step-up transformers; Surveying machines and instruments; Switches, electric; Transformers; Voltmeters; Computer terminals; Electric control panels; Electrical ducts; Electrical plugs and sockets; Telephone terminal