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Supplies to multi-occupancy buildings

Low voltage supplies to multi-occupancy buildings (including flats and commercial buildings) may require a Building Network Operator (BNO), an organisation that owns or operates the electricity distribution network within a multiple occupancy building between the intake position and the customer installations.

Requirements to provide connections to multi-occupancy buildings need to be discussed with our teams at an early stage in the process.

  • The BNO may be a licensed Electricity Distributor (i.e. an IDNO) or an unlicensed Electricity Distributor as allowed for in the Electricity Act 1989 (as amended by the Utilities Act 2000) and in the Electricity (Class Exemptions from the Requirement for a License) Order 2001.

  • The specific connections arrangements will be bespoke to each scheme and will depend upon the number of properties, the proposed meter locations and the type of equipment to be installed.

  • More information on the connection arrangements at a multi-occupancy building can be viewed in our company policy ST:SD5C Relating to Low Voltage Connections to Multiple Occupancy Buildings. This document provides information on the different options available including:

    • Drawings for the incoming cable requirements;
    • Typical arrangements for multi-service distribution boards/communal metering; and
    • Requirements for earthing and electrical bonding.

    This document is available to view on our Technical Information website.

    Our own policy is based on the Energy Networks Assocation’s Engineering Recommendation G87. Visit