26 mm 2 (10 AWG) ground wire must be used, and in all other markets a 6 mm 2 must be used. Grounding of the units: Attach a ground wire from one of. nsformers have DYn11 connections. A ground of all overhead line distribution equipment is always grounded and bonded to cont all be consider as a priority, if not available, then 70 mm2 copper conducto r normal soil condit. If you've ever found yourself scratching your head over whether that metal door on your distribution cabinet really needs a grounding wire, you're not alone. Your boss might insist on it, while your. In industrial and civil circuit wiring, the stainless steel monitor enclosure device serves as the physical casing for various switches and control components. For field. The LPS designer and the LPS installer should select suitable types of earth electrodes and should locate them at safe distances from entrances and exits of a structure and from the external conductive parts in the soil, such as cables, metal ducts, etc. During fault conditions, low impedance results in high fault current flow, causing overcurrent protective.