Businesses dealing in industrial electrical equipment supply, manufacture, assemble or maintain electrical products used in factories, warehouses, workshops and other commercial or industrial sites. Equipment may include electric motors, generators, transformers, switchgear, circuit breakers, control panels, power supplies, cables, connectors and electrical enclosures. Many also provide automation components such as variable-speed drives, sensors, relays and programmable controllers for operating or monitoring machinery and processes. Services can include advising on equipment selection, sourcing replacement parts, assembling or modifying control panels, and repairing or servicing electrical machinery. Depending on the business, customers may also be able to arrange installation, inspection, testing and commissioning, either directly or through specialist electrical contractors.