String.
asset_type_ncf = c("LV Poles", "LV Circuit Breaker",
"LV Pillar (ID)", "LV Pillar (OD at Substation)",
"LV Pillar (OD not at a Substation)", "LV Board (WM)",
"LV UGB", "LV Board (X-type Network) (WM)", "6.6/11kV Poles",
"20kV Poles", "HV Sub Cable", "6.6/11kV CB (GM) Primary",
"6.6/11kV CB (GM) Secondary", "6.6/11kV Switch (GM)", "6.6/11kV RMU",
"6.6/11kV X-type RMU", "20kV CB (GM) Primary", "20kV CB (GM) Secondary",
"20kV Switch (GM)", "20kV RMU", "6.6/11kV Transformer (GM)",
"20kV Transformer (GM)", "33kV Pole", "66kV Pole",
"33kV OHL (Tower Line) Conductor", "33kV Tower", "33kV Fittings",
"66kV OHL (Tower Line) Conductor", "66kV Tower", "66kV Fittings",
"33kV UG Cable (Non Pressurised)", "33kV UG Cable (Oil)",
"33kV UG Cable (Gas)", "66kV UG Cable (Non Pressurised)",
"66kV UG Cable (Oil)", "66kV UG Cable (Gas)",
"33kV CB (Air Insulated Busbars)(ID) (GM)",
"33kV CB (Air Insulated Busbars)(OD) (GM)",
"33kV CB (Gas Insulated Busbars)(ID) (GM)",
"33kV CB (Gas Insulated Busbars)(OD) (GM)", "33kV Switch (GM)",
"33kV RMU", "66kV CB (Air Insulated Busbars)(ID) (GM)",
"66kV CB (Air Insulated Busbars)(OD) (GM)",
"66kV CB (Gas Insulated Busbars)(ID) (GM)",
"66kV CB (Gas Insulated Busbars)(OD) (GM)", "33kV Transformer (GM)",
"66kV Transformer (GM)")