Electrics you can certify.

Every circuit, dead and live

• Insulation resistance at 500 V DC on every circuit
• Earth-loop impedance (Z_s) against fault-current
• RCD trip-time at 1× IΔn
• Continuity end-to-end (R₁+R₂)
• Polarity, bonding, earthing, accessories

Calibrated testers, not a socket-tester

Megger MFT1741 multifunction tester, UKAS-traceable annual calibration, low-resistance ohmmeter, insulation tester, RCD tester, loop impedance tester, approved voltage indicator, proving unit. Not a socket-tester from Screwfix. Calibration re-certification every 12 months, without exception — an out-of-cal tester invalidates every result on the report.

2391 · 18th Edition · NAPIT

Level 3 Award in Inspection, Testing & Certification (C&G 2391/2394/2395). BS 7671:2018+A4:2026 18th Edition current. NAPIT Approved Contractor (66245, annual subscription), so landlords, lenders and insurers can check our competence independently. £2 M public liability cover. All of that sits behind every test reading on your report.

Written, coded, defensible

Every observation coded to BS 7671 (C1 / C2 / C3 / FI). Schedule of circuits with every reading recorded. Schedule of test results. Schedule of inspections. Dated, signed, NAPIT-issued. Valid for landlord registration under the Electrical Safety Standards Regulations 2020, for a lender survey, for an insurance claim, for commercial compliance. Not a tick-box.

Fines up to £40,000

Landlords in England must hold a valid EICR under the Electrical Safety Standards in the Private Rented Sector and Social Rented Sector (England) Regulations 2020. Non-compliance can attract civil penalties up to £40,000 per breach. The Regulations require a qualified, competent person, working to current regulations, with dated test results. We are NAPIT-registered (66245), so you can check our competence independently.

And why circuit-count pricing is honest

Annual NAPIT registration. Annual calibration. 18th Edition re-certification. 2391 CPD. Public liability. Vehicle, tools, software, filed certificates. A proper EICR is two to four hours on site plus an hour of paperwork and lodging. Pricing per circuit is the fairest way to reflect the work the installation actually needs — not a flat fee that over-charges small flats and under-charges large houses.

What is an EICR?

An Electrical Installation Condition Report (EICR) is a formal, detailed inspection of the fixed electrical wiring in a property — everything from the incoming supply and main earthing arrangement through to final circuits, sockets, light fittings, and protective devices. Carried out in accordance with BS 7671:2018+A4:2026 (the 18th Edition of the IET Wiring Regulations), the report identifies any defects, deterioration, damage, or non-compliance with current safety standards. Every issue found is classified by severity using a standardised coding system, giving you a clear picture of what needs urgent attention and what can be scheduled for improvement.

When do you need one?

• Landlords (private rented): before a tenancy starts and at least every 5 years — a legal requirement under the Electrical Safety Standards in the Private Rented Sector and Social Rented Sector (England) Regulations 2020
• Commercial premises: no law sets a fixed interval; NICEIC recommends at least every 5 years, and your insurer or lease may ask for more often
• Owner-occupied homes: every 10 years, or when buying or selling a property
• After any major alteration: extensions, loft conversions, kitchen refits — any work that modifies existing circuits
• Insurance: check your insurance policy for any EICR condition before renewal
• Any time you notice electrical faults, burning smells, or frequent RCD/MCB trips

The EICR process, step by step

Our inspections follow the methodology set out in BS 7671 and the IET Guidance Note 3 (Inspection & Testing). Here is what happens during a typical EICR:

• Visual inspection: we examine the installation for obvious defects — damaged cables, missing covers, incorrect connections, signs of overheating, adequacy of earthing and bonding, and suitability of the existing consumer unit
• Dead testing (supply isolated): using calibrated Megger MFT1741/MFT1845 multifunction testers, we carry out continuity of protective conductors (R1+R2), continuity of ring final circuits, and insulation resistance testing at 500V DC across all circuits
• Live testing (supply restored): we measure earth fault loop impedance (Zs) at every point to confirm disconnection times comply with BS 7671 Chapter 41. We also verify polarity, confirm correct phase rotation on three-phase supplies, and measure prospective fault current (PSCC) at the origin
• RCD testing: every RCD and RCBO is tested at its rated residual current (1x), plus the test button, using a dedicated RCD tester. We verify trip times fall within the 300ms (1x) and 40ms (5x) limits specified in BS 7671
• Reporting: all results are recorded on the official EICR form (model forms from the IET). The report details every circuit, its test results, and any observations or defects found. A schedule of inspections and a schedule of circuit details are included

Classification codes explained

Every defect or observation found during an EICR is assigned a classification code. These codes determine the overall outcome of the report:

• C1 — Danger Present: risk of injury exists. Immediate remedial action is required. The installation is rated Unsatisfactory. Examples: exposed live parts, missing earth connections, overloaded circuits with signs of overheating
• C2 — Potentially Dangerous: the defect could become dangerous if not addressed. Urgent remedial action is required. Also rated Unsatisfactory. Examples: lack of earthing on circuits, absence of RCD protection where required, damaged cable insulation
• C3 — Improvement Recommended: the installation does not comply with the current edition of BS 7671 but did comply at the time of original installation. Does not affect the Satisfactory/Unsatisfactory outcome. Examples: lack of additional protection by RCD on socket circuits installed before the 17th Edition
• FI — Further Investigation: a potential defect has been identified but cannot be fully assessed without further investigation (e.g. opening up concealed wiring, lifting floorboards). On A4 reports, C3 and FI items do not on their own make the report unsatisfactory; only C1 or C2 do. Landlords must still get any further investigation the report requires done within 28 days

An installation is rated Satisfactory only when there are no C1 or C2 codes. If any C1 or C2 is present, it is Unsatisfactory and remedial work is required.

Landlord legal obligations

The Electrical Safety Standards in the Private Rented Sector and Social Rented Sector (England) Regulations 2020 impose strict legal duties on landlords:

• Electrical installations must be inspected and tested by a qualified, competent person at least every 5 years
• A copy of the EICR must be provided to existing tenants within 28 days of the inspection
• A copy must be given to new tenants before they occupy the property
• A copy must be supplied to the local authority within 7 days if requested
• If the report is Unsatisfactory, all C1 and C2 defects must be remedied within 28 days (or sooner if the inspector specifies)
• Non-compliance can result in remedial notices and financial penalties of up to £40,000 per breach
• Local authorities have the power to arrange remedial works themselves and recover costs from the landlord

We issue the EICR, carry out any required remedial works, and provide the updated certification — all in one service. No chasing separate contractors.

What happens if you fail?

If your EICR comes back Unsatisfactory, it is not the end of the world — but it does need to be dealt with promptly:

• C1 defects: we will make these safe immediately during the inspection wherever possible, or isolate the affected circuit to prevent danger
• C2 defects: we provide a clear, itemised quotation for all remedial works. For landlords, these must be completed within 28 days
• Remedial works: we carry out all necessary repairs — replacing damaged cables, upgrading earthing, fitting RCD protection, replacing consumer units, correcting wiring errors
• Re-inspection: after remedial works are completed, we re-test the affected circuits and issue an updated EICR confirming a Satisfactory outcome
• Certification: you receive the completed EICR, the Electrical Installation Certificate (EIC) for any new work, and Minor Works certificates where applicable

We handle the full cycle from inspection through remedial works to final certification, so you have one point of contact throughout.

Insurance & compliance

A valid EICR is increasingly important for insurance purposes and legal compliance:

• Insurers: policies differ; check whether yours has an electrical installations condition or asks for a current EICR, and keep the latest report where you can produce it quickly
• Commercial leases: most commercial tenancy agreements include a clause requiring the landlord to maintain a current EICR. Failure to comply can be a breach of lease
• Fire risk assessments: under the Regulatory Reform (Fire Safety) Order 2005, the responsible person must ensure electrical installations do not pose a fire risk. An EICR is the standard method of demonstrating compliance
• Sale of property: solicitors and conveyancers routinely request EICRs during property transactions. An Unsatisfactory report can delay or reduce a sale
• Health & safety at work: the Electricity at Work Regulations 1989 require employers to maintain electrical systems in a safe condition. An EICR is the primary evidence of compliance

Our testing equipment

We use professional-grade, calibrated instruments for every inspection. Our test kit includes:

• Megger MFT multifunction tester: insulation resistance (at 250V, 500V, 1000V DC), continuity (200mA test current), earth fault loop impedance (Zs), prospective short circuit current (PSCC), and RCD testing — all from one instrument
• Earth loop impedance tester: dedicated high-current loop tester for accurate Zs readings on heavily loaded circuits and for verifying Ze at the origin of the installation
• RCD tester: tests at 1/2x, 1x, 2x, and 5x rated residual current. Measures actual trip times in milliseconds. Tests both Type A and Type AC RCDs
• Voltage indicator (GS38 compliant): proving unit, fused test leads, and IP2X-rated probes as required by HSE Guidance Note GS38
• Thermal imaging camera: used to identify hot spots in distribution boards, loose connections, and overloaded circuits that are not visible to the naked eye
• Cable identification and tracing equipment: for verifying circuit routes, identifying unlabelled circuits, and confirming ring final circuit continuity

All instruments are calibrated annually and carry valid calibration certificates. Test results you can trust.

Full & partial rewires

Older properties — particularly those with original rubber or lead-sheathed cabling, imperial-sized conductors, or installations predating the 16th Edition — often need a full or partial rewire to meet current standards. We strip back outdated wiring, install modern twin-and-earth or LSOH (Low Smoke Zero Halogen) cable, fit a new consumer unit with RCBO protection on every circuit, and certify the entire installation. Minimal disruption, clean finish, fully compliant with BS 7671:2018+A4:2026. All work is notified to Building Control via our NAPIT registration. See our rewires service →

Consumer unit upgrades

If your fuse box still has rewirable fuses, an old MCB board without RCD protection, or a consumer unit that does not comply with the current non-combustible enclosure requirements of Amendment 3 to the 17th Edition (BS 7671:2008), it needs upgrading. We fit modern, metal-clad consumer units with RCBOs for individual circuit protection — meaning a fault on one circuit does not take out the rest of the property. We also label every circuit clearly and provide a full Electrical Installation Certificate (EIC) for the work. All notifiable under Part P of the Building Regulations and lodged with your local authority automatically through NAPIT.

Three-phase testing

Most commercial premises operate on a three-phase (TPN) supply. We test each phase individually, verify phase rotation, measure voltage between phases (typically 400V) and phase-to-neutral (230V), and confirm balanced loading across all three phases. Earth fault loop impedance is measured on every circuit across all phases. Prospective fault current (PSCC) is recorded at the origin and at each distribution board.

Distribution board schedules

Commercial buildings often have multiple distribution boards — main switch panel, sub-distribution boards per floor or zone, and dedicated boards for mechanical plant, kitchen equipment, or server rooms. We produce detailed distribution board schedules for every board, documenting each circuit, its protective device rating, cable size, maximum Zs, and test results. Essential documentation for facilities managers, insurance assessors, and future maintenance.

Fire safety integration

In commercial premises, the EICR sits alongside your fire risk assessment. We inspect emergency lighting circuits to BS 5266, fire alarm supply circuits to BS 5839, and fire-rated cabling. We verify that fire-rated enclosures, barriers, and seals are intact where cables pass through compartment walls and floors. This integrated approach means your EICR supports your fire safety case rather than contradicting it.

Sector-specific requirements

Different commercial environments have additional requirements:

• Offices: compliance with the Electricity at Work Regulations 1989 and DSE Regulations. PAT testing alongside the fixed installation EICR
• Retail & hospitality: high-demand circuits for commercial kitchens, refrigeration, and display lighting. Verification of isolation facilities and emergency switching
• Warehouses & industrial: high-bay lighting, three-phase machinery supplies, external lighting and CCTV circuits, and hazardous area considerations
• Healthcare & care homes: more stringent requirements under HTM 06-01. Shorter inspection intervals and additional testing of medical equipment circuits. Care home EICRs →
• HMOs: each unit and all common areas must be included. Landlords of licensable HMOs face additional scrutiny from local housing authorities

NAPIT & Part P compliance

DS Electrical is a NAPIT Approved Contractor, which means we are assessed annually for competence and compliance. All notifiable work under Part P of the Building Regulations (England and Wales) is automatically registered with your local authority through our NAPIT membership. You receive full certification including Electrical Installation Certificates (EICs), Minor Works certificates, and EICR reports — all lodged on the national database and traceable through your local Building Control office. We carry £2M public liability insurance.

Minimal disruption to your business

We understand that power outages cost money. For commercial EICRs, we work with you to schedule testing during quiet periods, out of hours, or over weekends where needed. Dead testing (which requires circuit isolation) is planned in advance so critical systems — servers, refrigeration, security, fire alarms — are affected for the shortest possible time. We carry temporary power distribution equipment to maintain essential services during extended testing periods.