1) Lamp change on failure together with cleaning of optical components, photo-electric cells and base compartments, oil moving parts.

2) Visual electrical inspection with above. Repair any electrical defects and bring up to requirements of current regulations.

3) Electrical safety inspections carried out on the basis of risk assessment, but no longer than every 6 years.

• Internal wiring - insulation resistance, polarity and earthing.
• Cable networks - insulation resistance, earth loop impedance, polarity and earthing.

4) Painting - re-paint at 10 year intervals. Paint galvanised column when thickness of galvanising has reduced to 30 microns.

5) Visual structural inspection carried out during every maintenance visit. Report any actual or incipient structural defects.

6) Annual structural test of sample columns to establish the rate of deterioration of stock.