This part of prEN 474 deals with all significant hazards@ hazardous situations and events relevant to trenchers as defined in EN ISO 6165:2012 and trenchers with mechanized laying unit@ when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4). It deals with: ?? self-propelled integrated trencher; ?? combinations of a carrier-vehicle (truck@ tractor@ special vehicle) and a trenching attachment; ?? trenching interchangeable equipment fitted to a derivative machinery (e.g. compact loader) or a compact tool carrier). ?? For self-propelled integrated trencher@ this part deals with all specific health and safety requirements. ?? For machinery which are a combination of a carrier-vehicle and a trenching attachment integrated to it (e.g. to a truck) or mounted on it (e.g. on a tractor)@ this part of prEN 474 deals with all specific health and safety requirements of the trenching attachment itself and of the interface (e.g. mechanical@ electric@ hydraulic@ controls) between the carrier-vehicle and its attachment as well as the interaction and effects on each other when used together (e.g. stability@ visibility). NOTE Carrier-vehicles are subject to other regulations (e.g. road regulations). ?? For derivative machinery@ this part deals with specific health and safety requirements of the interchangeable equipment and the interface with derivative machinery or tool carrier. ?? For those machinery@ this part doesn??t deal with the earth-moving machinery itself which can be subject to other standards (e.g. prEN 474-3 for a compact loader@ prEN 474-4 for a backhoe loader). This European Standard does not deal with continuous surface miners as defined in ISO/CD 19224@ trucktrenchers that do not incorporate a vacuum extraction system and self-propelled ride-on and pedestrian controlled floor cutting-off machinery (e.g. ground saw) which are under the scope of EN 13862. This document@ together with part 1@ deals with all significant hazards for earth-moving machinery ?C trenchers when they are used as intended and under the conditions of misuse which are reasonably foreseeable by the manufacturer associated with the whole life time of the machine (see Clause 4). The requirements of this part are complementary to the common requirements formulated in prEN 474- 1. This document does not repeat the requirements from prEN 474-1@ but adds or replaces the requirements for application for trenchers. This European Standard is not applicable to trenchers manufactured before the date of publication of this European Standard by CEN