37 Installation, repair and maintenance of electrical cables including cables with snap-fit connections; installation, repair and maintenance of cabling, light controls systems, power supplies, heating, ventilation, air conditioning, lighting, security and temperature management and building management systems, optical cables, cable for data transmission; installation, repair and maintenance of wiring including with master distribution boxes, extender cables, fuse spur tee's and whip ends; installation, repair and maintenance of wiring associated with power, fan coil, lighting; installation, repair and maintenance of fire resistant wiring and wiring systems; installation, repair and maintenance of plug-in re-locatable modular wiring components; information, voice and image transmission cable; installation, repair and maintenance of fire resistant wiring and wiring systems for railway tunnels and road tunnels, fire detection, alarm systems including fire alarm systems and emergency lighting