Installation, maintenance and repair of electrical and gas appliances, apparatus and equipment including but not limited to heating, lighting, ventilating and air-conditioning apparatus and electrical interference suppression equipment; electrical installation, maintenance and repair services; generator installation, maintenance and repair services; electrical wiring services; electricity connecting services; electricity disconnecting services; disconnecting unused service lines; repair of gas supply systems; laying of cables; repairing, constructing, installing, disconnecting, maintaining and modifying energy apparatus and infrastructure; installation of lighting systems; replacement of lights; installation of audio electrical apparatus; building insulating; installation of insulating materials; installation of apparatus for ventilating; installation of solar energy systems; installation, maintenance and repair of electronic monitoring devices; installation, maintenance and repair of alarms; fitting services; replacement of batteries; electrical engineering services (construction); project preparation relating to construction engineering; supervision of construction projects; renovation of buildings; renovation of kitchens; stove-setting; welding for repair purposes; advisory services relating to development of property; advisory services for the installation, maintenance and repair of electrical and gas apparatus, heating equipment, lighting, air conditioning apparatus, generators and insulations thereof; providing information, including by electronic means and via a global computer network, about all of the aforesaid services; installation of all electrical and communication cabling and apparatus; repairs and maintenance to all electrical and communication installations and apparatus