33 kV is the next step up from the more commonplace 11 kV feeds to villages and farms. 33 kV lines are normally found on wooden poles, but steel lattice towers (“pylons”) were historically also used. Where 11 kV feeds are almost always single circuit, 33 kV lines are more typically double-circuit. This can be double-circuit lattice towers, twin single-circuit wood pole lines, or double-circuit wood pole lines. The double-circuit wood pole lines in the UK are quite distinctive in design, although the giveaway for 33 kV is the larger insulators needed for the higher voltage.
- 33 kV lattice tower, Llansanffraid Glan Conwy, Conwy, Wales (Geograph)
- Three-crossarm intermediate H-pole (Wikipedia)
- Three-crossarm section H-pole (Wikipedia)