Black & White Facilities / Service brief
LV and HV Systems
LV and HV work needs clear system boundaries, asset ownership and operating authority before a programme is developed. Facilities teams taking over premises or planning load changes should assemble drawings, equipment findings and outage constraints so the required specialist assessment addresses the actual supply arrangement.
Overview
Trace dependencies upstream and downstream of the proposed change. An extension may affect more than its nearest board, so assessment needs to place the work within the connected installation.
Our full service catalogue, including every individual service, is available across every listed sector and location. For one site or several, we agree the scope, access and programme around the buildings concerned.
What the work can include
The instruction can review records, determine inspection and maintenance tasks, assess condition and coordinate specialist investigation or repair and replacement planning. Name the cables, plant, switchgear, transformers and controls included.
Outputs define the system boundary, findings, priorities and relevant revised drawings or test records. A project brief must allocate design, operating authority and external interfaces rather than treating all electrical assets as one maintenance task.
Important decisions
Different sections may be controlled by the network operator, landlord, occupier or another owner. Identify the party authorised to grant access, operate and approve work on each asset.
Condition, supportability, compatible spares, duty and outage opportunities inform maintenance or replacement. Equipment age is relevant but does not alone establish the required action.
Changes to connected plant require consideration of protection, earthing, controls and operating arrangements. HSE's electrical safety introduction identifies the specialist knowledge needed for activities such as maintaining high-voltage switchgear.
Before we visit
Supply available single-line diagrams showing main supply routes and equipment, together with asset and ownership details, findings and earlier work. Describe the proposed load change or existing problem.
Establish control of the installation, access limits and outage consequences. Check records against the assessed scope because old drawings may omit later changes. Assign missing information to a survey or records task before dependent activities proceed.
How the work proceeds
We confirm the work limits and responsible parties, then review evidence and identify the technical assessment. The resulting scope specifies design or maintenance duties, competent resources, operating permissions and verification.
Authorised people control switching, isolation and restoration through the agreed safe system. Handover records changes, tests, restrictions and follow-up, with drawings and asset information updated for the team maintaining the installation next.
What affects cost and timing
System voltage, asset type, condition, specialist attendance, testing and access influence cost. Network coordination, available outages and equipment lead times may govern the programme as much as installation duration.
Separate engineering and surveys from delivery, temporary provision and reinstatement in the proposal. Allocate system operation and network-related tasks clearly so responsibilities are not lost between different quotations.
Sector applications
Production dependencies influence supply assessment at industrial premises. Operating authority and failed-transfer consequences are central in critical environments. For Education estates, record both campus and individual building boundaries.
Within the full sector range, our complete offering serves FM companies, public and community premises, leisure, construction, veterinary sites, energy and utilities, social housing, laboratories and secure estates. Each technical scope is based on the particular premises and system.
Local coverage
Our regional coverage spans Northumberland, Tyne and Wear, County Durham and Tees Valley, including Berwick-upon-Tweed, Alnwick, Morpeth, Hexham, Newcastle, Gateshead, Sunderland, Durham, Darlington, Hartlepool, Stockton-on-Tees and Middlesbrough. Other covered areas appear in the full locations directory.
For an estate instruction, provide address-level operating contacts so access requirements and dependencies can be planned for each installation.
Frequently asked questions
Does low voltage mean the equipment is safe to work on?
The classification does not make contact or intervention safe. Work on low-voltage systems still requires appropriate competence and controlled arrangements.
Can you work on equipment owned by the network operator?
Network-owned equipment remains under its owner's authority and delivery arrangements. Identify and coordinate that interface; property ownership does not transfer control of those assets.
What if we do not have current drawings?
Share the available records and known alterations. A scoped review and site assessment can establish what is needed before dependent design or delivery.
Does changing one item require a whole-site shutdown?
The installation layout, isolation limits and task determine the interruption. Technical planning establishes which areas are affected and the checks before restoration.
Knowledge and useful reading
The electrical compliance checklist helps organise evidence, while what an EICR covers explains the general installation report. Establish separately whether the equipment requires specialist HV assessment and its associated records.
Related services and your next step
Relevant scopes include Electrical Services, Switchgear and Transformers, Power and Distribution, Asset Maintenance and Mechanical and Electrical Projects, connecting asset care with supply assessment and defined electrical projects.
Further requirements can be explored through all services, maintenance and all projects, with sectors, locations and the Knowledge Centre supplying broader site and guidance context.
Provide drawings, asset details, findings and the intended change, naming owners and operating contacts. Identify functions affected by an outage when using Contact Black & White Facilities to establish the next work package.
Discuss the scope
Tell us what needs attention.
Share the site, the issue and any access requirements so we can discuss the next step.