LV and HV Systems

A building extension can affect more than the nearest distribution board. The assessment should trace relevant upstream and downstream dependencies so the proposed change is considered within the actual supply arrangement.

Work can include reviewing system records, defining inspection and maintenance needs, assessing equipment condition, coordinating specialist investigations and developing repair or replacement packages. The exact plant, cables, switchgear, transformers and associated controls are listed in the scope.

Outputs include the agreed system boundary, findings, action priorities and relevant updated drawings or test records. A project brief identifies the technical design, operational authority and external interfaces needed; it does not treat all electrical equipment as a single interchangeable maintenance task.

Ownership and control. A network operator, landlord, occupier or other asset owner may control different parts of the supply. Establish who authorises access, operation and work for each part.

Maintain or replace. Condition, supportability, spare parts, duty and available outage windows shape the decision. Age alone does not establish the required action.

System interfaces. Protection, earthing, controls and operating arrangements must be considered when changing connected equipment. HSE highlights the specialist knowledge needed for work such as high-voltage switchgear maintenance in its electrical safety introduction.

Provide single-line diagrams if available: these show the principal supply paths and connected equipment. Include asset details, ownership information, inspection findings, previous work and the load change or problem being considered.

Identify the party controlling the system, access restrictions and the operational consequence of interruption. Documents are checked against the actual scope; an old drawing cannot be assumed to describe later alterations. Missing information becomes a defined survey or records task before dependent work proceeds.

We establish the work boundary and responsible parties, review the available evidence and identify the appropriate technical assessment. The resulting scope sets out the design or maintenance tasks, competent resources, operating permissions and verification requirements.

Work proceeds through an agreed safe system, with switching, isolation and return to service controlled by the appropriate authorised people. Handover records what changed, tests undertaken, operating restrictions and follow-up requirements. Required drawings and asset records are updated so the next maintenance team can understand the installation.

Equipment type, voltage system, condition, specialist attendance, test scope and access affect price. External coordination, outage availability and long-lead equipment can determine the programme as much as physical installation time.

A complete proposal separates survey and engineering work from delivery, temporary arrangements and reinstatement. Clarify who provides operational control and any network-related work so those responsibilities do not become gaps between quotations.

For industrial premises, the supply arrangement needs to be considered alongside production dependencies. In critical environments, operating authority and the consequences of a failed transfer are central to the brief. Education estates need campus and building boundaries recorded.

These applications sit within the full sector range, including FM companies, public and community premises, leisure, construction, veterinary premises, energy and utilities, social housing, laboratories and secure estates. The complete service and project offering is available across the sectors we serve; the technical brief follows the particular site.

Our North East coverage includes Northumberland, Tyne and Wear, County Durham and the Tees Valley: Berwick-upon-Tweed, Alnwick, Morpeth, Hexham, Newcastle, Gateshead, Sunderland, Durham, Darlington, Hartlepool, Stockton-on-Tees and Middlesbrough, together with the areas in the full locations directory.

For a portfolio, provide each site's address and operating contacts so the programme can account for local access and dependencies.