The provisions of this Chapter, technical codes and of the regulatory codes adopted here shall apply to the following:

1. The location, design, materials, equipment, construction, reconstruction, alteration, repair, maintenance, moving, demolition, removal, use, and occupancy of every building or structure or any appurtenances connected, attached, or used in connection with any such building or structure;
2. The installation, erection, alteration, repair, use and maintenance of plumbing systems consisting of building sewers, building drains, waste and vent systems, hot and cold water supply systems, and all fixtures and appurtenances;
3. The installation, erection, alteration, repair, use and maintenance of mechanical systems consisting of heating, ventilating, air conditioning or refrigeration systems, fuel burning equipment, and appurtenances; and
4. The installation, erection, alteration, repair, use and maintenance of electrical systems and appurtenances.