What size excavator do I need for trenching?

For standard plumbing and electrical trenches (300–600mm wide, up to 1.5m deep), a 1T or 1.7T mini excavator is ideal. For deeper utility trenches (1.5m–3m), a 3.5T or 5.5T excavator provides the reach and power required. The right machine depends on trench depth, width, and soil conditions.