What Is an EICR? Does Your Peterborough Home Need One?
An EICR — Electrical Installation Condition Report — is the most reliable way to understand exactly what condition the wiring in your Peterborough home is in. It is not a visual check or a quick once-over. It is a systematic, circuit-by-circuit inspection and test of the entire electrical installation, carried out by a qualified electrician using calibrated testing equipment, producing a formal report that grades every fault found by severity and tells you precisely what needs attention and how urgently.
Despite being the definitive assessment of electrical safety, most homeowners across Peterborough have never had one. The installation behind the walls works silently — lights come on, sockets deliver power, and nothing has visibly failed — so the assumption is that everything must be fine. But wiring deteriorates invisibly over decades. Insulation degrades. Connections loosen. Earth paths weaken. And by the time a fault manifests as a tripped circuit, a burning smell, or worse, the underlying condition has usually been deteriorating for years. An EICR catches these problems while they are still fixable rather than after they have become dangerous.
This guide explains what an EICR involves, what the results mean, who needs one, and what happens if problems are found.
What Does an EICR Involve?
The electrician starts at the consumer unit — the heart of the installation where every circuit begins. The board is opened and visually inspected for signs of overheating, corrosion, loose connections, and compliance with current standards. The protective devices — MCBs, RCDs, RCBOs, or rewirable fuses — are identified and their ratings checked against the circuits they protect.
Each circuit is then tested individually. The tests measure specific electrical properties that reveal the condition of the cabling and connections even though they are hidden behind walls and above ceilings.
Insulation resistance measures how effectively the cable insulation separates the conductors from each other and from earth. Low insulation resistance indicates the cable covering has deteriorated — cracked, degraded by heat, or damaged physically — allowing current to leak where it should not. This is one of the primary indicators of wiring that has reached the end of its reliable life.
Earth fault loop impedance measures how effectively a fault would be cleared by the protective device. In simple terms, it confirms that if a live conductor touches something it should not — a metal appliance casing, a pipe, or a person — the circuit breaker will trip fast enough to prevent harm. High impedance means the fault clearance is too slow to protect safely.
Continuity confirms that protective earth conductors are connected throughout and that the circuit is intact from the consumer unit to every socket, switch, and fitting on that circuit. A break in the earth path means a fault has no safe route to trip the protective device — a serious safety concern.
RCD and RCBO operation tests confirm that the residual current devices protecting against earth faults trip within the millisecond timeframes Building Regulations require. A slow RCD may not disconnect fast enough to prevent electric shock. A failed RCD provides no earth fault protection at all despite being physically present on the board.
The electrician also visually inspects a sample of accessories — sockets, switches, light fittings, and junction boxes — for signs of overheating, damage, incorrect wiring, and general condition. The consumer unit earthing and bonding arrangements are checked to confirm they meet current requirements.
An EICR on a typical three bedroom Peterborough house takes two to four hours depending on the number of circuits, the accessibility of the installation, and the condition of what the electrician finds. More faults mean more investigation time.
What Do the Results Mean?
The EICR report lists every observation and grades each one using a standardised coding system.
C1 — Danger present. An immediate risk of injury exists. This is the most serious grading and means the fault needs addressing urgently — ideally before the electrician leaves or within hours. Examples include exposed live conductors, missing protective devices, and installations where contact with a live part is possible during normal use. C1 defects are rare but when they appear they demand immediate action.
C2 — Potentially dangerous. A fault exists that could become dangerous under certain conditions. This grading requires urgent remedial action — not necessarily the same day but within weeks rather than months. Examples include circuits without adequate earth fault protection, deteriorated cable insulation that has not yet failed completely but is heading that way, and protective devices rated incorrectly for the circuits they protect. C2 defects are the most common serious findings on older Peterborough properties.
C3 — Improvement recommended. The installation does not meet current standards but is not immediately dangerous. Examples include the absence of RCD protection on socket circuits (which was not required when many older installations were built but is now standard), bonding arrangements that meet previous but not current requirements, and accessories that are functional but outdated. C3 observations do not require urgent action but indicate areas where improvement would enhance safety.
FI — Further investigation required. The electrician identified something that could not be fully assessed without additional work — for example, a junction box that could not be accessed without lifting more floorboards than the EICR scope covers, or a circuit that gave borderline test results and needs more detailed investigation. FI codes flag areas where the full picture is not yet clear.
The overall installation receives a verdict — satisfactory or unsatisfactory. An unsatisfactory result does not mean the house is about to catch fire. It means one or more C1 or C2 defects were found that need addressing to bring the installation to an acceptable safety standard.
Who Needs an EICR?
Landlords are legally required to have an EICR carried out on every rental property in England at least every five years, and before new tenants move in. The report must be provided to tenants within 28 days and to the local authority within seven days if requested. Non-compliance carries penalties of up to £30,000. Peterborough has a significant rental market — particularly around the city centre, the university area, and the newer developments — making landlord EICRs one of the most frequently requested electrical services we carry out.
Homeowners have no legal obligation to have an EICR but there are several situations where getting one is strongly advisable.
If your property is more than 25 years old and has never had an electrical inspection, the installation has been running without assessment for longer than its designed monitoring interval. The IET Wiring Regulations recommend inspection every ten years for domestic properties — meaning a house built in 1990 should ideally have had two or three inspections by now.
If you are buying a property, an EICR tells you exactly what condition the electrics are in before you commit. A standard home survey does not assess the electrical installation in any detail — the surveyor may note visible issues like an old consumer unit but cannot test circuits or assess hidden wiring. An EICR fills this gap with factual, tested data rather than visual assumptions.
If you are planning a renovation, an EICR before work starts identifies any underlying electrical issues that should be addressed during the renovation when walls are open and trades are on site, rather than discovered afterwards when fixing them means disrupting finished surfaces.
If your insurance company asks about the age or condition of the installation, an EICR provides the documented evidence they want. Some insurers are increasingly requesting electrical certificates, particularly on older properties and after claims related to electrical faults.
If you have any concerns about your electrics — frequent tripping, flickering lights, warm sockets, or an old consumer unit you have been meaning to get checked — an EICR provides definitive answers rather than ongoing uncertainty.
What Happens If Problems Are Found?
The EICR report tells you exactly what was found, where, and how serious it is. The grading system makes priorities clear — C1 defects need immediate attention, C2 defects need urgent action, and C3 observations can be addressed at your convenience.
For most Peterborough homeowners receiving their first EICR on an older property, the report typically contains a mix of C2 and C3 findings. Common C2 defects include circuits without RCD protection, deteriorated cable insulation on specific circuits, and bonding that does not meet current standards. Common C3 observations include socket circuits without RCD protection that was not required when installed, and accessories that are functional but outdated.
The electrician who carried out the EICR provides straightforward advice on what needs doing and a quote for the remedial work. The most common remedial actions across Peterborough are consumer unit upgrades to add RCD or RCBO protection, partial rewiring to replace specific circuits with deteriorated cabling, bonding upgrades to bring earthing up to current standards, and replacement of individual accessories that have deteriorated.
Not every finding requires expensive work. A consumer unit upgrade addressing several C2 defects related to missing RCD protection costs £400 to £800 and completes in a day. A bonding upgrade costs £150 to £300. These targeted interventions resolve the most common findings without requiring a full rewire.
Where the EICR reveals widespread deterioration across the majority of circuits — multiple C2 defects on different circuits indicating the installation has degraded broadly — a full or partial rewire is the appropriate response. The EICR data guides exactly which circuits need replacing and which are acceptable to keep, allowing a targeted approach that addresses the genuine problems without replacing wiring that still has reliable life.
How Much Does an EICR Cost?
An EICR on a typical three bedroom Peterborough property costs between £150 and £250 depending on the number of circuits and the accessibility of the installation. A two bedroom flat costs between £120 and £180. A four bedroom house costs between £200 and £300. Larger properties with more circuits cost proportionally more.
The cost of the inspection is modest compared to the value of the information it provides. Knowing exactly what condition your installation is in — with tested, graded, documented evidence rather than assumptions — allows you to make informed decisions about maintenance, remedial work, or rewiring based on facts rather than anxiety.
How Often Should You Have an EICR?
The IET Wiring Regulations recommend domestic properties are inspected every ten years. Rental properties require inspection every five years by law. Properties that have recently been rewired receive a certificate valid for the period specified by the electrician — typically ten years — after which a fresh EICR assesses the installation’s condition at that point.
If your Peterborough home has never had an EICR, booking one is the single most useful thing you can do for your electrical safety. The inspection tells you whether the installation is satisfactory, identifies anything that needs attention, and gives you a documented baseline against which future changes can be measured.
If you want an EICR at your Peterborough property, get in touch. We carry out inspections for homeowners, landlords, and buyers across the city and surrounding area, and provide clear, honest reports with straightforward advice on any findings.