EICR Testing
Mid Somerset
Full BS 7671-compliant Electrical Installation Condition Reports for domestic, commercial and listed premises across Mid Somerset. Priced per circuit — £30 single-phase, £40 commercial 3-phase — so you pay for what your installation actually needs.
Call Us 07889 334849Free safety checklist → — 10-minute self-check before you book.
This is in-depth testing,
not a walk-round.
An EICR is a statutory-quality inspection of the fixed electrical installation. It sits behind landlord compliance, insurance claims and house-sale surveys. When done properly, this is what a single visit actually contains — and it’s why we price per circuit, not by the hour.
Every circuit, dead and live
- Insulation resistance at 500 V DC on every circuit
- Earth-loop impedance (Zs) against fault-current
- RCD trip-time at ½× and 5× IΔn
- Continuity end-to-end (R1+R2)
- Polarity, bonding, earthing, accessories
Calibrated specialist testers
Megger MFT1741 multifunction tester (c. £1,400 new), 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+A2:2022 18th Edition current. NAPIT Approved Contractor (governing body, annual subscription) — the registration that makes our certificate legally valid for landlord compliance, lender surveys and insurance. £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 (PRS England) 2020, for a lender survey, for an insurance claim, for commercial compliance. Not a tick-box.
Fines up to £30,000
Landlords in England must hold a valid EICR under the Electrical Safety Standards (Private Rented Sector) Regulations 2020. Non-compliance can attract civil penalties up to £30,000 per breach. The certificate must come from a registered inspector, on current regulations, with dated test results. A cheap cert from someone without the registration isn’t a legal certificate — it’s a liability.
And why £30 per circuit 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.
Electrical Safety,
Done Properly
Whether you need a landlord certificate, a full rewire, or a consumer unit upgrade -- we handle it all to current regulations with zero fuss.
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+A2:2022 (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): every 5 years or at each change of tenancy -- this is a legal requirement under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020
- Commercial premises: every 5 years as recommended by BS 7671 and required by most insurers. Many commercial leases mandate a valid EICR as a condition of the tenancy
- 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 requirement: many insurers now ask for a valid EICR before issuing or renewing cover. Without one, a claim involving electrical fire or damage could be voided
- 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 1x, 5x, and where applicable 1/2x rated residual current 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). Must be investigated and resolved before the report can be finalised
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 (England) Regulations 2020 impose strict legal duties on private 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 fines of up to £30,000 per breach, enforcement notices, and in serious cases, a banning order from the PRS database
- 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: Many commercial and landlord insurance policies now require a valid EICR as a condition of cover. If a fire or electrical incident occurs and you cannot produce one, your insurer may refuse the claim entirely
- 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+A2:2022. All work is notified to Building Control via our NAPIT registration.
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 (BS 7671), 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.
Commercial EICR:
Larger Buildings, Complex Systems
Commercial EICRs are more involved than domestic inspections. Larger installations mean more circuits, more distribution boards, three-phase supplies, and stricter compliance requirements. Here is what sets a commercial EICR apart.
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 specialist 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. This is 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 EICR specialist →
- 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 are also CHAS accredited and 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.
Real readings,
not a tick-box.
Insulation resistance, earth fault loop, RCD trip-time, polarity, continuity -- every value taken with a calibrated Megger MFT and recorded against the circuit on your report.
EICR across
Mid Somerset.
Free survey across our coverage area. Tap your nearest town for local detail and a city-specific enquiry form.
NAPIT
CHAS
City & Guilds
TrustMark
Part P
BS 7671EICR FAQ
What is an EICR?+
An Electrical Installation Condition Report (EICR) is a formal inspection of the fixed electrical wiring in a property. It identifies any defects, deterioration, or non-compliance with current safety standards (BS 7671 18th Edition Amendment 2). The report classifies issues by severity and confirms whether the installation is satisfactory for continued use.
When do I need an EICR?+
Landlords are legally required to have an EICR every 5 years or at each change of tenancy. Homeowners should have one every 10 years or when buying or selling a property. Commercial properties require an EICR every 5 years. You should also get one if you notice any electrical faults or have not had one before.
Do landlords legally need an EICR?+
Yes. Since 1 July 2020, all rental properties in England must have a valid EICR under the Electrical Safety Standards in the Private Rented Sector (England) Regulations 2020. It must be carried out every 5 years or at each change of tenancy. A copy must be supplied to tenants within 28 days and to the local authority on request. Fines of up to £30,000 per breach.
How much does an EICR cost?+
EICRs are priced per circuit, not a flat fee. Domestic and single-phase installations are from £30 + VAT @ 20% per circuit. Commercial three-phase installations are from £40 + VAT @ 20% per circuit. A typical 3-bed house has 6–10 circuits. Send your address and we will count the circuits and come back with a firm quote the same day. Portfolio discounts for multi-property landlords.
What is the difference between an EICR and a PAT test?+
An EICR covers the fixed electrical installation — the wiring, consumer unit, sockets, lights, and protective devices. PAT (Portable Appliance Testing) covers plug-in appliances: kettles, extension leads, computers, tools. Most commercial premises need both. DS Electrical Installations (SW) Ltd carries out EICRs in-house and offers PAT testing as an add-on.
What if my EICR fails (gets a C1 or C2)?+
C1 means danger present, immediate risk — we make safe before leaving site. C2 means potentially dangerous and must be remedied for the report to be classed Satisfactory. We give you a written remedial quote alongside the report, you accept what you want done, and we re-test affected circuits free of charge once the work is complete.
How long does an EICR take?+
Most domestic 1-bed flats: 1.5–2 hours. 3-bed semi: 2.5–3 hours. 5-bed period property: half a day or more. Commercial three-phase installations vary with circuit count and access. Every circuit is dead-tested for continuity, insulation resistance, polarity, earth fault loop impedance, and RCD timing — readings are recorded against the schedule, never ticked off without measurement.
More questions? See our full FAQ →
Further Reading
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From enquiry to
certified install.
Every project follows the same five-step process. No surprises, no scope creep.
Call or message
Tell us what you need: domestic EICR, landlord certificate, or commercial inspection. We book you in on the phone or via WhatsApp.
Site visit scheduled
We arrange a time that works for you or your tenants. For portfolios, we batch visits to reduce admin overhead.
Full inspection
Megger MFT multifunction tester. Dead test insulation resistance, live test earth loop impedance, RCD test at 1x and 5x, PAT integration where relevant.
Certificate issued
Satisfactory reports issued same-day. Unsatisfactory reports come with an itemised remedial quote for the C1/C2 items.
Logged for you
Digital certificate pack emailed, cloud-archived, and (for landlords) supplied to your tenants within 28 days per the 2020 Regulations.
If C1 or C2 codes came back,
your installation may need a rewire.
A C1 (danger present) or multiple C2 (potentially dangerous) codes usually point to deteriorated cabling, no earth on lighting circuits, rewireable fuse boxes or fabric-insulated wiring. Partial or full rewire is the long-term fix. Free on-site survey, fixed written quote in 48 hours, NAPIT certificate on completion.
- From £3,500 (2-bed)
- 5-10 days typical
- Stay in the property
- Part P notified