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Types of agreements

Once a connection offer has been accepted, we may need to enter into an enduring agreement which sets out the terms and conditions for the connection. This can include Connection Agreements for individual premises or Bilateral Connection Agreements for embedded networks owned by an Independent Network Operator (IDNO).

  • As a result of the supply contract you enter into with your chosen supplier, you will automatically enter into the National Terms of Connection. In many instances, we will also require a site specific connection agreement.

    What is a connection agreement?

    A connection agreement is an agreement between the owner/occupier and WPD. This agreement will set out the necessary terms and conditions upon which the customer is connected to the Distribution System.

    The connection agreement contains information such as;

    • the address of the connection
    • the owner of the connection
    • the capacity being connected
    • whether the supply is for import or export

    There may also be diagrams showing the ownership boundary between the customer’s equipment and WPD.

    When is a connection agreement required?

    There may be a number of triggers for a connection agreement, usually applying when the connection:

    • requires 50kVA import or greater
    • will be exporting 30kW or greater
    • will be connected at High Voltage (HV) or greater

    A connection agreement will not normally be required for domestic premises. However, we may occasionally utilise a connection agreement where there is a proposed installation which may cause a disturbance to the network, for example the installation of motors or welders.

    What do the connection agreements look like?

    Example connection agreements are provided below:

    EHV Generation Connection Agreement
    Low Voltage Connection Agreement 
    EHV Alternative Connection Agreement

  • We have developed a bilateral agreement which combines both the network access for live LV jointing and HV Operations together with the network adoption agreement. This FNAA Agreement allows an ICP/IDNO to sign up to one overarching agreement for adoption of assets and live jointing works across all four WPD areas.

    Are site specific details included?

    The Framework agreement is overarching. However, we will require a Site Specific Schedule to be put into place for each scheme or project. The benefit of this approach is that it requires substantially less paperwork for each scheme than the previous tripartite agreement.

    A Site Specific Schedule sits under the overarching agreement and is put in place for each scheme or project and requires substantially less paper work than the previous Tripartite agreement.

    What does the agreement look like?

    An example agreement is available to view here.

    How can I enter into an agreement for my company?

    To enter into this agreement with us, or if you have any questions please contact the connection policy team at

  • Extensions of contestability

    Once an ICP has signed up to the FNAA Agreement, they can choose to participate in further offerings that have been made available with the opening of the Connections Market.

    A number of Extension of Contestability Agreements (EoC’s) are available for ICP’s to sign onto which will enable them to carry out additional works in relation to Competition-inConnections activities.

    To enter into any of these agreements with us, or if you have any questions, please contact the connection policy team at

    Self-determination of a point of connection

    In some instances, ICP's and IDNO's can determine their own Point of Connection (POC) in place of applying to WPD for a POC.

    The table below identifies the Market Segments within which the ICP/IDNO can determine their own Point of Connection:

    Market SegmentSelf-Determination Available (Yes/No)Comment
    LV DemandYMatrix available
    HV DemandYSimplified design process available in accordance with ST:SD1F
    HVEHV DemandN 
    EHV132 DemandN 
    DG LVN 
    DGHVEHVYLimited to 50kW on DGHV schemes (installed generation capacity)
    UMS LAY 
    UMS OtherY 

    The following criteria when a Point of Connection can be determined through the Standard Design Matrix utilising the common template:

    Connection capacity200kVA maximumReduced to 150kVA maximum for 6.6kV networks
    Distance to substation200mIncreased to 250m for capacity less than 150kVA
    Service cable length30m 
    Transformer Capacity315kVA and aboveRestriction on total load on single LV fuse way
    Asset types excludedNone 

    A copy of the EoC for Self-Determination of a Point of Connection is available to view:

    Self-Determination of a Point of Connection

    Self inspection

    We undertake inspections on ICP’s for both their design work and physical installation of assets t be adopted by WPD. As inspections are completed, ICP’s will move through the differing inspection levels which decrease the percentage of inspections required. Once they have attained level 3 in all areas, in which 5% of schemes will be inspected, ICP’s can apply to move to a self-inspection level.

    A copy of the EoC for Self-Inspection is available to view here

    LV Cable identification service

    ICPs are responsible for carrying out their works in a safe manner and this includes positively identifying the correct cable prior to making a connection. ICPs are unable to undertake signal injection identification on the WPD network. An EoC is available where ICPs wish to ask WPD to undertake this method of identification on their behalf when needed.

    A copy of the EoC for LV Cable Identification Service is available here.

    Rent a test probe

    We can provide Test Equipment on a when needed basis to ICP’s who have entered into the Rent a Test Probe extension of contestability agreement. The hire of this equipment is subject to the terms and conditions of the Test Prod Hire EoC Agreement.

    A copy of the EoC for Rent a Test Prod is available to here.

    Issues and return of keys for WPD substations

    Under the self-connection processes, ICPs may on occasion require access to WPD substations in the course of their works. This agreement enables ICP’s to hire substation keys from WPD. A copy of the EoC for Issue and Return of Keys for WPD Substation is available to view here.

    Self-Approval of Design

    In some instances, ICPs and IDNO's can self-approve their own design, subject to the qualifying criteria to reach self-inspection level. The table below indicates the Market Segments within which the ICP/IDNO can self-approve their designs:

    Market SegmentSelf Approval Available (Yes/No)Comment
    LV demandY 
    HV demandY 
    HVEHV demandN 
    EHV132 demandN 
    DG LV 
    UMS LAY 
    UMS OtherY 

    An audit process is in place to ensure that designs are compliant with WPD policies and standard techniques.

    The table below identifies the qualifying criteria that will apply to allow an ICP/IDNO to move between the different levels of design approval:

    1100% Audit, 20 audits to move to level 2
    250% Audit, 5 audits to move to level 3
    35% Audit
    Self-audit level 15% Audit, 5 audits to move to self-audit level 2
    Self-audit level 22% Audits

    Further details on self-determination of a point of connection and design self-approval can be found within the standard techniques which can be accessed via the Technical Information page.

  • Where the new connections and network are to be adopted by an IDNO the connection to our distribution network will be covered under a Bilateral Connection Agreement detailing matters such as the connection characteristics and responsibilities.

    Click here to view the Agreement.