The Common Connection Charging Methodology (CCCM) is used by Distribution Network Operators (DNOs) to calculate charges for providing a connection to their networks. The CCCM sets out a number of rules, including both the voltage rule and the High Cost Cap (HCC) which is applied to certain distributed generation connections.
We have been asked by the DNOs to clarify our policy position on which of the two rules takes precedence in the event that a connection scheme triggers both rules. This letter sets out our view, subject to consultation, that the voltage rule should take precedence over the HCC and therefore that the customer should only pay for reinforcement up to one voltage level above their point of connection.