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.

Send the property address, any system drawings, inspection reports and the issue prompting the enquiry. Explain which parts of the premises you own or manage. Ask the landlord or existing operator for equipment ownership and control details where they are not in your records.

The next assessment establishes what belongs to the property instruction and what needs a separate authorised party. Access to a plant room does not by itself give permission to operate its equipment. Known alterations and tenant additions should be identified before the existing drawings are relied on.

We clarify the property boundary, affected equipment and intended outcome before defining the specialist assessment or work. An owner or managing agent receives a scope that identifies both the physical task and the permissions and technical responsibilities needed to carry it out.

The programme accounts for occupiers, shared supplies and the relevant operating authority. At completion, handover explains the work, verification records, changes to the installation and any restrictions that remain. The owner can then update property records and communicate the operating position to affected occupiers.

Price depends on the equipment involved, the quality of existing information, specialist assessment and the work needed around it. Obtaining ownership records or arranging access through a landlord can affect the programme before physical work begins.

A proposal should identify any survey stage, external-party work and outage requirements separately. For a shared property, establish who informs occupants and approves the interruption. Allow for verification and handback within the window, not only the repair or installation itself.

For managing agents, landlord and network ownership must be distinguished from tenant equipment. For warehousing and logistics, new equipment can prompt a wider supply review. Most individual property enquiries begin with the low-voltage installation; identify high-voltage involvement from verified records.

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 an individual property, include the full address, access contact and any restriction affecting delivery or working hours.

No. Low voltage is a system classification, not a statement that contact or intervention is safe. Electrical work still needs appropriate competence and control.

Its owner controls the authority and delivery route. The project must identify that interface and obtain the appropriate arrangements; a property owner's instruction does not transfer control of network assets.

Request the available drawings, equipment ownership details, previous reports and the operating contact. These establish which parts of the enquiry the property can authorise and which need another party.

Not necessarily. The system layout, isolation boundaries and work determine the affected area. The technical plan establishes the actual outage and return-to-service checks.

Use the electrical compliance checklist to organise records and read what an EICR covers. A general installation report and specialist HV assessment have different scopes; establish which evidence is needed for the equipment concerned.

See Electrical Services, Switchgear and Transformers, Power and Distribution, Asset Maintenance and Mechanical and Electrical Projects.

Browse all services, maintenance, all projects, sectors locations and the Knowledge Centre.

Send the property details, available electrical records, ownership contacts and the issue or change required. State which areas you control and any access restrictions. Contact Black & White Property Services to define the next assessment or works package.