Is no RCD a fail on an EICR?

There is no single rule that every installation without RCD protection automatically receives an unsatisfactory EICR. Inspectors assess each circuit against the applicable requirements of BS 7671 and record coded observations where protection is absent or inadequate for the location and use of that circuit.

A report becomes unsatisfactory when it contains at least one C1 or C2 observation. Under the current A4:2026 EICR format, an FI observation is advisory and does not by itself make the overall EICR unsatisfactory. Missing RCD protection may be recorded as C3 — improvement recommended — in which case the overall result can still be satisfactory. Conversely, unprotected circuits in higher-risk locations or circumstances where potential danger exists may attract C2 and make the report unsatisfactory.

Read the observation text and code together, not the phrase “no RCD” in isolation. The linked classification hub explains C1, C2, C3 and FI in broader detail; this page stays focused on how RCD absence is judged on periodic reports.

A residual current device monitors the balance of current in live conductors and disconnects the circuit when it detects a residual current above its rated trip value. That response can reduce the risk of fatal electric shock where a person contacts live parts while also connected to earth, or where fault current flows through an incomplete earth path.

RCD protection is expected on many socket-outlet circuits, outdoor supplies, bathroom zones and other locations where portable equipment or contact with water increases foreseeable risk. Fixed lighting-only circuits, some dedicated equipment circuits and certain specialist outlets may be assessed differently depending on the installation and the inspector's professional judgement.

An RCD is not a substitute for sound earthing, bonding, correct cable selection or safe isolation. A device that trips repeatedly may indicate an underlying fault rather than a successful safety outcome. The EICR documents what protection is present and whether it operates within expected parameters — it does not guarantee that every shock scenario is eliminated.

When a designer installs a new circuit or carries out a substantial alteration, current BS 7671 requirements for additional RCD protection apply to the scope of that work. Omitting required protection from newly designed in-scope circuits cannot be justified merely because the rest of the building predates modern expectations.

An EICR has a different purpose. It reports on the condition of an installation already in service and whether it is satisfactory for continued use. The inspector uses the current standard and inspection guidance as a safety benchmark but does not simply list every feature that differs from a brand-new installation and classify each departure as dangerous.

The age of wiring provides context, but “it complied when fitted” is not a complete defence to a present danger. Equally, “the latest edition now requires RCDs on more circuits” does not make every older board unsafe. Actual condition, circuit use, available protection and foreseeable risk determine the classification.

The schedule of inspections includes lines confirming whether RCD protection is provided where relevant. The schedule of test results records trip times and test-button operation for devices that were tested. Where no RCD is fitted on a circuit that the inspector considers should have additional protection, an observation is added to the numbered list with a classification code and descriptive text.

Generic wording such as “no RCD protection on socket circuits” should be read alongside the code letter. C3 indicates improvement recommended; C2 indicates potentially dangerous and urgent remedial action required; FI means further investigation is needed before a definitive classification can be given. The code defines urgency relative to the observed safety outcome, not a fixed lookup table.

Reports may note mixed protection levels after partial upgrades — for example, a new consumer unit with RCBOs on some circuits while older sub-boards remain unprotected. Each observation should identify the affected board and circuit. Use observation numbers in all quotation and completion correspondence.

C1 means danger is present and immediate action is required. C2 means a condition is potentially dangerous and urgent remedial action is needed. C3 means improvement is recommended. Under the A4:2026 report format, FI means further investigation is advised and does not itself make the assessment unsatisfactory. Check the edition used for your report and any applicable landlord duty.

RCD absence alone, without another dangerous condition or a circuit use that creates foreseeable shock risk, will not normally demonstrate exposed live parts or an immediately dangerous state. A more severe code needs a reason tied to the installation under inspection — the circuit's purpose, who uses it, environmental conditions and what other fault protection is present.

Professional judgement can produce questions, but it should remain explainable. Ask which circuits are affected, which requirement or guidance was applied, what evidence changed the risk assessment and what work would resolve the observation. A factual explanation is more useful than demanding a universal code from an online list.

• Which circuits lack RCD protection — socket outlets, outdoor supplies, bathroom zones and mobile equipment circuits are assessed differently from fixed lighting-only circuits
• Age and extent of the installation — partial consumer-unit upgrades may leave mixed protection levels across boards
• Whether the visit is a periodic inspection of an installation already in service, an inspection before a new tenancy, or certification of recent alteration work
• Presence of other protective measures, earthing arrangements, supplementary bonding and the inspector's professional judgement under BS 7671
• Whether further investigation (FI) is needed because circuits could not be fully tested, covers could not be removed or access was limited on the day
• Foreseeable use of the circuit — a socket serving a garden, garage or shared hallway carries different risk from a dedicated boiler supply
• Whether nuisance tripping, heat damage or failed RCD test results indicate an underlying defect rather than simple absence of a device

Example one: an older owner-occupied house has a serviceable fuse board, satisfactory circuit test results and no signs of thermal damage. Socket circuits lack additional RCD protection. The inspector may record C3 on those circuits while the overall result remains satisfactory, meaning improvement is recommended but not urgent.

Example two: a rented flat has unprotected socket circuits in rooms where portable heaters and extension leads are foreseeable. The inspector identifies potential shock risk from the combination of circuit use, accessible outlets and absent additional protection. That condition may attract C2 and make the report unsatisfactory — not because “no RCD” is a keyword, but because the safety outcome in that context is potentially dangerous.

Example three: a consumer unit was partially upgraded with RCBOs on kitchen and bathroom circuits, but a legacy sub-board feeding outdoor sockets remains on rewireable fuses without RCD protection. The outdoor circuit observation may carry a more urgent code than the lighting-only sub-circuit, reflecting location and use rather than treating the whole property identically.

“Every socket circuit without an RCD fails the EICR” confuses improvement recommendations with unsatisfactory outcomes. Many reports record RCD absence as C3 on older installations that remain satisfactory overall. The code letter and overall result must be read together.

“Fitting an RCD will always clear a C2” is also unreliable. If the observation concerns damaged wiring, inadequate earthing or a circuit that cannot be safely characterised, adding a device without investigating the underlying condition does not resolve the safety concern. Remedial scope follows the observation, not the device name alone.

“RCD test buttons prove everything is safe” overlooks that the test button verifies only the mechanical trip mechanism, not full fault-path performance under load. Conversely, “my board has test buttons so it must have RCDs everywhere” is wrong because RCBOs and some other devices also have test facilities. Device markings and circuit schedules are needed for identification.

“It passed years ago, so missing RCD cannot matter now” overlooks changed use, alterations and improvements in available evidence. But the opposite claim — that every pre-RCD installation must be unsatisfactory — is equally unreliable. The present safety assessment remains the central question.

A C2 observation on RCD protection results in an unsatisfactory EICR because urgent remedial action is required. An FI observation is advisory under the current A4:2026 format and does not by itself make the overall result unsatisfactory. Where the report requires further investigative work, landlord follow-up is a separate regulatory duty. The overall result describes the report at the time of inspection; it does not mean the certificate can be edited informally once someone says work has been done.

Owners and agents should separate three documents in their records: the original EICR, the contractor's quotation or scope, and the certification or written confirmation for completed remedial work. Depending on the work, this may include an Electrical Installation Certificate, Minor Electrical Installation Works Certificate, or other suitable confirmation supported by test results.

A new full EICR is not automatically required after every repair. The reporting inspector or remedial contractor should state what verification is appropriate. Our unsatisfactory EICR guidance covers the overall follow-up process; this article remains about interpreting RCD-related observations.

For a specified tenancy in England, the Electrical Safety Standards in the Private Rented Sector and Social Rented Sector (England) Regulations 2020 require inspection and testing by a qualified person, and a copy of the report to tenants in the circumstances regulation 3(3) sets out. The copy duty applies to the report that was obtained. It is not a duty to supply only a satisfactory report. Where the report indicates the landlord is or may be in breach of the duty to keep the electrical safety standards met, and the report requires further investigative or remedial work, regulation 3(4) can require a qualified person to do that work within 28 days, or any shorter period the report states, starting with the inspection and test.

That framework does not assign the observation code. A satisfactory report that only recommends improvement does not start the regulation 3(4) duty. A C2 letter, read without the report requiring further work, does not start it either.

Different regimes may apply to social housing, licences, commercial premises or properties outside England. The property manager should check the relevant framework rather than assuming one national rule covers every let.

• Which exact circuits and distribution boards does the observation cover?
• What classification code was assigned and what safety outcome supports it?
• Are other protective measures present — earthing, bonding, circuit design — that informed the assessment?
• Was access limited on any circuits, and does FI apply until those areas can be inspected?
• Would correcting an underlying wiring defect change the recommendation?
• What certification will be supplied for any remedial or alteration work?
• Does the proposed remedial scope address only the listed observations or include optional upgrades?

A protective device cannot be selected safely from its front label alone. The circuit's conductor capacity, fault-current and disconnection requirements, existing RCD arrangement, board system and manufacturer's tested assembly all affect selection. Mixing an unsupported device into an enclosure can create mechanical, thermal and certification problems.

Consumer units contain parts that may remain live even when individual circuit breakers are off. Removing covers or moving conductors creates electric-shock, arc and fire risk. Do not open the board, fit RCBOs or RCD modules, alter bonding or use improvised test methods. Use an electrician competent to diagnose the circuit and design the protection.

If there is a burning smell, crackling, discolouration, heat, smoke, repeated tripping or exposed material, keep people away, stop using the affected equipment or circuit where that can be done safely, and obtain urgent professional help. Do not wait for a routine EICR appointment to address active danger.

If a consumer-unit upgrade has been recommended, read about consumer unit replacement and ask which scope fits your existing installation.

Read the observation, classification, overall assessment and circuit schedule together. If your report lists missing RCD protection, ask the inspecting electrician which observations affect the overall satisfactory status and what remedial options exist — RCBO upgrades, additional RCD modules or selective circuit protection may be appropriate depending on board layout.

Obtain remedial quotations before assuming the property cannot be let. Some observations allow planned correction within agreed timescales; others need faster action. For a fresh inspection or remedial scope after an unsatisfactory result, check residential pricing and book when access is confirmed.

Have an RCD observation on your report? Ask for a remedial quotation so the recorded findings can be reviewed before work is agreed.

Sources checked on 3 October 2026. Read this guidance alongside your own EICR: its edition, observations, extent and limitations matter. Ask a qualified electrician to assess the findings at your property.

Standards, statutory guidance and the facts at a property can change. Use this article to ask better questions, not to override an inspector who has examined and tested the installation. The report-specific observation, current technical requirements and competent professional judgement determine the appropriate classification and remedy.

This article was editorially reviewed on 2026-10-03. It provides general operational guidance for London property decision-makers and is not personalised legal advice.

Electrical classification on an EICR depends on the installation, the observations recorded and competent professional judgement. Always read your own report and seek competent advice for your property.