Lighting Pole Marking: PMO, UMO, DMO, OGK, NFG — Finding an Equivalent

What OGK and NFG mean

OGK is a Cyrillic abbreviation for a faceted conical pole, one that tapers from bottom to top.

NFG stands for a non-load-bearing, flanged, faceted pole. It is fixed to the foundation by a flange and designed for the luminaire and its own weight only, not for significant extra loads.

This is general industry terminology, not one plant’s brand. Several manufacturers have marked poles this way under older standard designs, and the number after the letters usually gives the pole height in metres.

Our ranges follow the same shape principle

Our ranges split the same way, by shape and by fixing type; the marks and technical specifications are our own:

This is a correspondence by shape and fixing PRINCIPLE, not a direct one-to-one replacement — our poles are made to our own technical specifications (TU U 25.1-39573934-001:2016) with our own dimensions, wall thickness and load ratings, which may differ from a specific OGK or NFG product even at the same nominal height.

Classifying lighting poles: shape, purpose, fixing

Lighting poles are classified by three independent traits, and the mark (PMO, UMO, etc.) reflects the first two.

The shaft can be multi-sided, conical or round (compared in detail in Multi-Sided or Tapered Poles). By height and load, poles are split into park, street and road types. Fixing to the foundation is either flanged or direct-buried (see Flanged or Direct-Buried Lighting Pole Mounting).

What’s included with the pole

A pole’s mark (e.g. PMO-6) describes the shaft only. The rest of the set is ordered as separate items: a luminaire bracket (see Brackets, Crossarms and Caps for Lighting Poles), a foundation anchor cage sized for the height and load (FPO, FPM, FKM Foundation Anchor Cages), and a cable-entry hatch with a grounding loop (Grounding Metal Poles).

List these items in the request along with the mark. Otherwise the supplier fits the pole with a default set, and that may not match your project.

How to find the exact equivalent

If you need a replacement or an equivalent for an old pole, or for a specification line marked OGK or NFG, send us the actual parameters: height, top and bottom shaft diameter, wall thickness, fixing type (flanged or ground-set) and load (luminaire type and weight).

We will select the matching model in our own range or calculate one individually.

Marking examples

A mark is the range name (PMO, UMO, DMO and others) plus the pole height in metres. The catalogue gives the type of each range. Examples:

• PMO-6: park multi-sided pole, 6 m high, 66 kg;
• UKO-8: street conical pole, 8 m high, weighing 98 kg;
• DMO-10: road multi-sided pole, 10 m high, 194.5 kg.

Ranges compared at a height of 8 m

All poles are 8 m high. PLO is the lightweight multi-sided park range:

Masses are from the table Height and Mass of Lighting Poles.

Checklist for choosing a range

• purpose: courtyard or park (PLO, PMO, PKO), street (UMO, UKO), arterial road (DMO);
• height and pole spacing: set them with the pole selection calculator;
• the luminaire and wind region decide the permissible load on the pole, and with it the final model.

Common mistakes

• treating OGK as the same thing as PKO or UKO just because they are all conical: OGK is faceted, while PKO and UKO are round in cross-section. Only the shape principle matches, so diameters and wall thickness must be checked separately;
• choosing a park range for a street because the height matches. PMO-8 has a 3 mm wall and weighs 85 kg, while the street UMO-8 has a 4 mm wall and weighs 109 kg, so the load and wind region are checked by calculation.

How to read the letters in our series marks

A mark is three letters and a number. The first letter gives the purpose: P is park, U is street, D is road. The second gives the shaft shape: M is multi-sided, K is tapered, L is a lighter multi-sided version. The third, O, stands for “pole”. The number after the hyphen is the height in metres. The letters come from the Ukrainian names of the series.

What to measure on an old pole to find a replacement

When a specification says only “OGK-8” or “NFG-6” and there are no drawings, the mark says nothing about dimensions, but they can be taken from the pole itself. You will need:

• the height from the ground to the top of the shaft and the diameter at the top;
• the diameter at the base and the wall thickness (from the passport or drawing, and if there is none, the wall is measured with an instrument);
• the flange: plate size, spacing of the holes, hole diameter, number of anchors and thread size;
• the hatch: its size and the height of its lower edge above the base;
• the bracket reach, the number of luminaires, and their area and mass.

For comparison, here is what the UMO-8 card gives: top diameter 60 mm, base 206 mm, wall 4 mm, a 300×300 mm flange with holes spaced 220×220 mm, four M24 anchors, a 500×90 mm hatch 600 mm from the base, and the FPO-1000-1 anchor cage. If the flange and anchors of the old pole do not match these figures, the new pole will not fit the old foundation without rework.

How to write a line in the order

A short, complete order saves questions. The example below is for a street with UMO-8 poles: the series dimensions come from the catalogue, the other values are illustrative.

You can check the permitted luminaire area for your pole and bracket in the pole selection calculator by luminaire area and mass.