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CONTENTS

  • 1 An introduction to Unmetered Supplies
    • 1.1 What are Unmetered Supplies under the BSC?
    • 1.2 What is the purpose of this document?
    • 1.3 Before reading on, some key roles and terms explained...
    • 1.4 What is Half Hourly (HH) and Non Half Hourly (NHH) Trading?
      • 1.4.1 Calculation of the Maximum Demand of an UMS Inventory
      • 1.4.2 Half Hourly
      • 1.4.3 Non Half Hourly
      • 1.4.4 Market-wide Half Hourly
    • 1.5 What are Central Management Systems (CMS)?
  • 2 What are Charge Codes?
    • 2.1 Why do I need one?
    • 2.2 What are discontinued Charge Code structures?
    • 2.3 The structure explained
      • 2.3.1 Lamps
      • 2.3.2 Traffic equipment
      • 2.3.3 Miscellaneous equipment
      • 2.3.4 Issuing of UMSO specific and Published Miscellaneous Charge Codes
      • 2.3.5 Control equipment
      • 2.3.6 Highway Message and Indicator Signs - Devices with variable hours
  • 3 How do I apply for a Charge Code?
    • 3.1 Considerations in respect of Charge Code applications
    • 3.2 Test data requirements
    • 3.3 Applying to use a range of Generic LED Lighting Charge Codes
      • 3.3.1 The structure of Generic LED Lighting Charge Codes
      • 3.3.2 Manufacturer Equipment LED Range Spreadsheet
    • 3.4 Test procedure for LED Variable Message, Bus Information Signs and signs with variable light levels
    • 3.5 Test procedure for Belisha Beacons
    • 3.6 Test procedure for CCTV Equipment
    • 3.7 Test procedure for Constant Light Output (CLO)
    • 3.8 Test procedure for Variable Power Switch Regime (VPSR) Devices
    • 3.9 Testing requirements for Wi-Fi Equipment
    • 3.10 Testing requirements for 50 Series Electronic Ballasts
    • 3.11 Charge Codes for Central Management System (CMS) Equipment
    • 3.12 Charge Codes for Speed/red light cameras or equipment that includes cameras
    • 3.13 Charge Codes for Lighting Controls powered by lamp drivers with auxiliary output.
    • 3.14 Charge Codes for Sensors, CCTV, etc. powered by lamp drivers with auxiliary output.
  • 4 How are Charge Codes Calculated?
    • 4.1 Equipment that is less than 10 Watts
    • 4.2 Traffic signal heads
      • 4.2.1 Continuous green aspects
      • 4.2.2 How do I record traffic signal equipment in my inventory?
      • 4.2.3 Dimming Traffic Signals
      • 4.2.4 Dummy Loads for LED Traffic Lights
      • 4.2.5 What are filter signals?
    • 4.3 Cable network cabinets (Miscellaneous Codes Starting 813)
      • 4.3.1 Legacy arrangement
      • 4.3.2 Charge Codes at Cabinet Level
      • 4.3.3 Charge Codes at Component Level
  • 5 Not used
  • 6 Photoelectric Control Unit (PECU) array location and siting guidance
    • 6.1 Location of a single array
      • 6.1.1 Weighted latitude and longitude of inventory
      • 6.1.2 Latitude and longitude for the centre of the GSP Group
    • 6.2 Deciding on multiple or single arrays
    • 6.3 Hosting and maintenance of the arrays
  • 7 What are Switch Regimes?
    • 7.1 Hybrid/thermal Photoelectric Control Units (PECUs)
    • 7.2 Part night dimming
    • 7.3 Variable Power Switch Regime (VPSR) Switch Regimes
    • 7.4 Variable Power Switch Regime Spreadsheet
      • 7.4.1 Energy calculation for dimming of Generic LED Lighting Charge Codes ending ‘100’
    • 7.5 Highway Message and Indicator Sign operating hours
    • 7.6 Valid Combinations of Charge Codes and Switch Regimes
      • 7.6.1 Valid Combinations of Equipment Charge Codes and Switch Regimes
      • 7.6.2 Valid Combinations of Control Charge Codes and Switch Regimes
    • 7.7 Equivalent Meter Default PECU Switch Regimes
  • 8 Standard file format for detailed inventories
    • 8.1 General comments
    • 8.2 Standard file format
    • 8.3 Notes on standard inventory format
    • 8.4 Notes for Customers on declaring Charge Codes and Switch Regimes for Variable Power Switch Regime (VPSR) Devices

Operational Information Document V32.0

Effective From Date:11/09/2026
Status:LIVE
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