# The Five Estuaries Offshore Wind Farm Order 2025, Paragraph 171: Interpretation

Extent: E+W

In this Part—
“apparatus” means electric lines or electrical plant (as defined in the Electricity Act 1989), belonging to or maintained by National Grid together with any replacement apparatus, and includes any structure in which apparatus is or will be lodged or which gives or will give access to apparatus;
“EACN Substation Area” means the land shown in the lands plans as plots 17-031, 18-001 and 18-002, within which National Grid intends to construct the New National Grid Substation;
“Incentive Deduction” means any incentive deduction National Grid Electricity Transmission Plc receives under its electricity transmission licence which is caused by an event on its transmission system that causes electricity not to be supplied to a demand customer and which arises as a result of the authorised development;
“New National Grid Substation” means the substation to be constructed by National Grid within the EACN Substation Area as part of the NTT project, and into which the undertaker will connect as part of the authorised development;
“New National Grid Substation Boundary” means the area forming the new National Grid substation located within the EACN Substation Area, which lies or will lie within the final fenceline of that substation site and within which the connection agreement between the undertaker and National Grid Electricity System Operator applies;
“NTT project” means the Norwich to Tilbury Grid reinforcement project, for which National Grid intends to submit a Development Consent Order application;
“Specified Works” means any of the onshore works or activities undertaken in association with the onshore works which—
(a)will or may be situated over, or within 15 metres measured in any direction of any apparatus; and/or
(b)may in any way adversely affect any apparatus; and/or
(c)includes any of the activities that are referred to in development near overhead lines EN43-8 and HSE’s guidance note 6 “Avoidance of Danger from Overhead Lines”;
“STC” means the System Operator Transmission Owner Code prepared by the electricity Transmission Owners and NGESO as modified from time to time;
“STC Claims” means any claim made under the STC against National Grid Electricity Transmission Plc arising out of or in connection with the de-energisation (whereby no electricity can flow to or from the relevant system through the generator or interconnector’s equipment) of a generator or interconnector party solely as a result of the de-energisation of plant and apparatus forming part of National Grid Electricity Transmission Plc’s transmission system which arises as a result of the authorised works; and
“Transmission Owner” means as defined in the STC.

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Source: https://www.legislation.gov.uk/uksi/2025/1376/schedule/9/paragraph/171 (the official version)
Page: https://openlegislation.uk/five-estuaries-offshore-wind-farm-order-2025/schedule-9/paragraph-171
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.