Every Circuit
Accountable.
Downtime in a commercial building costs more than the repair bill. Compliance failures cost more than the fine.
Conduit designs the electrical infrastructure behind mixed-use towers, aged assets, and complex refurbishments — substations to final circuits, drawn before a single cable tray is ordered.
Five phases. No surprises.
Every Conduit engagement follows the same structured sequence — from initial site assessment to final handover certificate. Scroll through each phase to see exactly what happens, what we deliver, and why it matters for your project.
We read the building before we draw a line.
What the asset actually is, not what the drawings claim.
Most electrical problems are inherited. Ageing switchgear, undersized mains, undocumented modifications — they hide in plant rooms and ceiling voids until they become someone's emergency. Conduit's site survey produces a verified baseline: confirmed incoming capacity, existing load measurement, containment routes, and an honest condition assessment of every distribution board in scope.
Deliverables
Site Survey Report
Verified incoming supply data, load measurements, and condition ratings for all existing switchgear.
Containment Route Study
Marked-up floor plans showing proposed cable ladder routes, riser positions, and congestion risks.
Risk Register
Documented deficiencies in existing installation with remediation priority and cost indication.
Survey Checklist — Indicative
Every circuit drawn. Every load calculated.
Drawings that a contractor can price without guessing.
Conduit produces full construction-issue electrical drawings — single-line diagrams, distribution board schedules, cable sizing calculations, and lighting design to CIBSE standards. Each drawing references the relevant clause of BS 7671 so the installer knows exactly why each decision was made. The design pack is the project's permanent technical record.
Deliverables
Annotated Single-Line Diagrams
Full SLDs from incoming supply to final circuit, with fault level calculations and protective device coordination.
Load Schedules & Cable Sizing
Diversity-applied load calculations, volt-drop analysis, and cable sizing to BS 7671 Appendix 4.
Lighting Design Pack
DIALux-calculated layouts to CIBSE LG5/LG7, with emergency lighting point placement and maintained lux levels.
Sign-off that stands up to scrutiny.
Written for the inspector, not the filing cabinet.
Planning committees and building control officers see the same boilerplate compliance statements every week. Conduit writes technical narratives that answer the actual question being asked — whether that's demonstrating Part L energy performance, satisfying a DNO connection requirement, or providing the fire engineer with confirmed emergency system parameters. We've presented electrical compliance to planning committees on twelve major London developments.
Deliverables
BS 7671 Compliance Schedule
Section-by-section confirmation of 18th Edition compliance with deviation log where performance-based solutions are used.
Planning Compliance Statement
Plain-language technical narrative for planning submission, co-ordinated with architect and fire engineer.
Building Control Package
Full submission drawings and calculations for building control approval, including energy compliance evidence.
BS 7671:2018+A2
IET Wiring Regulations 18th Edition
BS EN 60947
LV switchgear and controlgear
Part L — Building Regs
Conservation of fuel and power
BS 5266-1
Emergency lighting provisions
EAWR 1989
Electricity at Work Regulations
DNO G99 / G100
Connection of generation plant
5 of 5 applicable regulations confirmed compliant · 1 under active review
Packages that contractors price fairly.
Ambiguity is where contingency goes to hide.
Vague tender documents produce wide price spreads, inflated contingencies, and post-contract disputes. Conduit writes detailed employer's requirements, produces bill-of-quantities frameworks, and manages a structured tender process — typically returning four to six comparable bids within six weeks. We evaluate returns on technical merit as well as price and provide a recommendation report that gives the client confidence, not just a number.
Deliverables
Employer's Requirements
Detailed specification of all electrical works, materials standards, testing obligations, and O&M deliverables.
Tender Management
Pre-qualification, tender list management, site visits, tender clarification, and evaluation report.
Bid Comparison Report
Normalised cost comparison, technical assessment, and contractor recommendation with supporting rationale.
HV Substation & Transformer Works
3 contractors · £284,000 est.
Main LV Distribution & Switchgear
4 contractors · £196,500 est.
Lighting & Emergency Systems
3 contractors · £88,000 est.
Building Management Integration
2 contractors · £41,200 est.
Tested, witnessed, and handed over clean.
No system leaves site without a verified certificate.
Commissioning is where design intent meets physical reality. Conduit witnesses all statutory tests — insulation resistance, earth fault loop impedance, RCD operation, emergency lighting duration — and issues the Electrical Installation Certificate under our NICEIC approval. The O&M manual we compile becomes the building's electrical bible: every circuit labelled, every test result recorded, every maintainable item scheduled.
Deliverables
Witnessed Test Certificates
NICEIC-issued Electrical Installation Certificate with full Schedule of Test Results for every circuit.
O&M Manual
Structured operations and maintenance manual with as-installed drawings, equipment data sheets, and maintenance schedules.
Handover Package
Labelled distribution boards, circuit schedules posted inside each board, and a training session for the FM team.
Witnessed Test Certificate
Project 2247 — Commissioning Record
Insulation resistance — all circuits
Earth fault loop impedance
RCD operation time (30 mA)
Emergency lighting duration
Protective conductor continuity
Polarity verification
All tests passed — Certificate issued 14 Feb 2026
The first meeting
has already started.
You've seen how Conduit approaches a project. The next step is a 30-minute scoping call — no obligation, no pitch deck, just a direct conversation about your building and what it needs.
"Conduit caught three non-compliances in the inherited drawings before we broke ground. That single review saved us four weeks of remedial work and a notifiable incident."
Marcus Okafor
Development Director · Meridian Property Group, London
"They wrote the compliance narrative for the planning committee in language the councillors could actually understand. The electrical section passed first time."
Dr. Priya Nair
Associate Architect · Studio Nair + Whitfield, Manchester