What excavator is best for trenching in NSW?

## Best Excavator for Trenching in NSW Trenching is one of the most common applications for mini excavator hire in NSW. Whether you're installing plumbing, electrical conduit, NBN cable, stormwater drainage, or irrigation, the right excavator makes the job fast, accurate, and safe. ### Trenching Specifications by Application | Application | Typical Trench Width | Typical Trench Depth | Recommended Machine | |---|---|---|---| | Plumbing (sewer/water) | 300–500mm | 600–1,200mm | 1T or 1.7T | | Electrical conduit | 200–300mm | 500–600mm | 1T | | NBN cable | 200–300mm | 500mm | 1T or 0.8T | | Stormwater drainage | 300–600mm | 600–900mm | 1.7T | | Ag-pipe / French drain | 300–400mm | 600–800mm | 1T | | Gas line | 300–400mm | 600mm | 1T | | Irrigation | 200–300mm | 300–500mm | 0.8T or 1T | ### The Importance of Dial Before You Dig Before any trenching work in NSW, you must call 1100 or visit dialbeforeyoudig.com.au to identify underground services in your area. This is a legal requirement under NSW Work Health and Safety legislation. Striking an underground service can cause serious injury, death, or significant property damage — and the hirer is responsible. Dial Before You Dig is free and typically takes 2–3 business days to receive plans. Plan ahead and submit your request before your hire date. ### Trenching in Different Soil Types **Sandy soil (Eastern Suburbs, Northern Beaches):** Easy to trench. The 1T is fast and efficient. Trench walls may need shoring for deep trenches (over 1.5m) as sandy soil can collapse. **Clay soil (Western Sydney, Hills District):** Harder to cut but stable trench walls. The 1.7T is more efficient in heavy clay. Clay trenches are less likely to collapse but harder to dig. **Rock (Inner West, North Shore):** Rock trenching requires a hydraulic rock breaker attachment. Contact BuildHire about rock breaker hire for trenching in rocky areas. ### Trench Safety in NSW For trenches deeper than 1.5 metres, NSW Work Health and Safety regulations require either: - Shoring or benching to prevent collapse, or - A Safe Work Method Statement (SWMS) addressing the risk of trench collapse For residential trenching under 1.5m deep, standard precautions apply: never enter a trench without shoring, keep excavated material away from the trench edge, and ensure no one is in the trench when the excavator is operating nearby. ### Combining Trenching with Other Work Mini excavators are versatile — you can use the same machine for trenching and other excavation work on the same day. Many BuildHire customers hire a 1.7T for a full day and use it for both trenching and other site preparation tasks, maximising the value of the hire.