CPV: 45311000 Electrical wiring and fitting work, 38431200 Smoke-detection apparatus, 38521000 Pressure scanners, 45230000 Construction work for pipelines, communication and power lines, for highways, roads, airfields and railways; flatwork, 45231000 Construction work for pipelines, communication and power lines, 45231100 General construction work for pipelines, 45232000 Ancillary works for pipelines and cables, 45300000 Building installation work, 45315000 Electrical installation work of heating and other electrical building-equipment, 45315600 Low-voltage installation work, 45315700 Switching station installation work, 45317000 Other electrical installation work, 45330000 Plumbing and sanitary works, 45350000 Mechanical installations