Sample electrical installation condition report

Page 1 of 8 · Certificate

ELECTRICAL INSTALLATION CONDITION REPORT Report No.: SAMPLE-EICR-0001

Sample Electrical Ltd

01632 960000 certs@example.com

SECTION A: DETAILS OF THE PERSON ORDERING THE REPORT

Name Sample Client Ltd

Address 1 Example Street, Sampletown, ZZ99 9ZZ

SECTION B: REASON FOR PRODUCING THIS REPORT

Periodic inspection for a change of tenancy (sample)

Date(s) on which inspection and testing was carried out 12/10/2026

SECTION C: DETAILS OF THE INSTALLATION WHICH IS THE SUBJECT OF THIS REPORT

Occupier Sample Tenant (sample)

Address 1 Example Street, Sampletown, ZZ99 9ZZ

Description of premises ☑ Residential ☐ Commercial ☐ Industrial ☐ Other (include brief description)

Estimated age of wiring system 8 years

Evidence of additions / alterations? ☐ Yes ☑ Not apparent

Installation records available? (Regulation 651.1) ☑ Yes ☐ No

Date of last inspection 08/10/2021

SECTION D: EXTENT AND LIMITATIONS OF INSPECTION AND TESTING (see Regulation 651)

Details of those parts of the installation that have been inspected and tested Whole installation: consumer unit DB1 and all final circuits listed in the schedules (sample).

Agreed limitations including the reasons Fixed wiring only; floor coverings not lifted; loft not entered (sample).

Agreed with: Sample Client Ltd

Unless specifically agreed between the client and inspector prior to the inspection: • Cables concealed within trunking and conduits, under floors, in roof spaces, and generally within the fabric of the building or underground, have not been inspected. • No checks for safety alerts, corrective actions or product recalls for electrical equipment forming part of the installation have been made. An inspection should be made of other electrical equipment housed within an accessible roof space.

Operational limitations including the reasons (see page no. N/A) None

(Use continuation sheet(s) if necessary) The inspection and testing detailed in this report and accompanying schedules have been carried out in accordance with BS 7671:2018 as amended to A4:2026

SECTION E: SUMMARY OF THE CONDITION OF THE INSTALLATION

Overall assessment of the installation as detailed in Section D, is

SATISFACTORY / UNSATISFACTORY* (Delete as appropriate) in terms of suitability for continued service.

*An unsatisfactory assessment indicates that dangerous (code C1) and/or potentially dangerous (code C2) conditions have been identified. Where the overall assessment of the suitability of the installation for continued use above is stated as UNSATISFACTORY, any observations classified as ‘Danger present’ (code C1) or ‘Potentially dangerous’ (code C2) should be acted on as a matter of urgency.

General condition of the installation (in terms of electrical safety) Installation in good order for its age. One C3 recommendation (sample).

Any observation classified as ‘Improvement recommended’ (code C3), or ‘Further investigation’ (code FI), is advisory and does not affect the overall assessment but should be given due consideration.

SECTION F: RECOMMENDATION FOR NEXT INSPECTION

Subject to the necessary remedial action being taken, I/We recommend that the installation is further inspected and tested before 12/10/2031

for the following reasons Rented home: 5-yearly inspection (sample).

BS 7671:2018+A4:2026 Page 1 of 8

Page 2 of 8 · Certificate

SECTION G: DECLARATION

I/We, being the person(s) responsible for the inspection and testing of the electrical installation (as indicated by my/our signatures below), particulars of which are described above, having exercised reasonable skill and care when carrying out the inspection and testing, hereby declare that the information in this report, including the observations and the attached schedules, provides an accurate assessment of the condition of the electrical installation taking into account the stated extent and limitations in section D of this report.

Inspected and tested by: Report authorized for issue by:

Name (Capitals) ALEX EXAMPLE Name (Capitals) ALEX EXAMPLE

Signature [signed – sample signature] Signature [signed – sample signature]

For/on behalf of Sample Electrical Ltd For/on behalf of Sample Electrical Ltd

Position Inspector (sample) Position Qualified Supervisor (sample)

Address Unit 0, Example Yard Address Unit 0, Example Yard

Sampletown Sampletown

ZZ99 9ZZ ZZ99 9ZZ

Date 12/10/2026 Date 12/10/2026

SECTION H: SCHEDULES AND CONTINUATION SHEET(S) ATTACHED

N/A Continuation sheet(s) for Section(s)

2 Schedule(s) of Inspection

2 Schedule(s) of Circuit Details and Schedule(s) of Test Results.

The schedule(s) and continuation sheet(s) listed are part of this document and this report is valid only when they are attached to it.

SECTION I: SUPPLY CHARACTERISTICS AND EARTHING ARRANGEMENTS

Earthing arrangements ☐ TN-C ☐ TN-S ☑ TN-C-S (PME) ☐ TN-C-S (PNB) ☐ TT ☐ IT

Number and Type of Live Conductors

☑ AC

☑ 1-phase, 2-wire ☐ 1-phase, 3-wire ☐ 2-phase, 3-wire ☐ 3-phase, 3-wire ☐ 3-phase, 4-wire

☐ DC

☐ 2-wire ☐ 3-wire ☐ Other

☑ Confirmation of supply polarity

Nature of Supply Parameters

Nominal voltage, U/U (1) 230 V

0

Nominal frequency, f (1) 50 Hz

Prospective fault current, Ipf (2) 1.6 kA

External earth fault loop impedance, Ze (2) 0.21 Ω

(Note: (1) by enquiry (2) by enquiry or by measurement)

Supply Protective Device

BS (EN) BS 88-3

Type Fuse

Rated current 100 A

Breaking capacity 16 kA

☐ Other sources of supply (as detailed on attached continuation sheet)

SECTION J: PARTICULARS OF INSTALLATION REFERRED TO IN THE CERTIFICATE

Means of Earthing

☑ Distributor’s facility ☐ Installation earth electrode

Maximum Demand

Maximum demand (load) 60 A

Details of Installation Earth Electrode (where applicable)

Type (rod(s), tape etc)

Location

Electrode resistance/impedance, RA/Ze

Main Protective Conductors

Earthing conductor: Material Copper

csa 16 mm²

☑ Connection / continuity verified

Main protective bonding conductors: Material Copper

csa 10 mm²

☑ Connection / continuity verified

☑ To water installation pipes ☑ To gas installation pipes ☐ To oil installation pipes ☐ To structural steel ☐ To lightning protection system

☐ To other

BS 7671:2018+A4:2026 Page 2 of 8

Page 3 of 8 · Certificate

Specify

Main switch (Isolation device / Switch-fuse / Circuit-breaker / RCD etc.)

Location Hall cupboard (consumer unit)

BS (EN) BS EN 60947-3

No of poles 2

Current rating 100 A

Voltage rating 230 V

If overcurrent protective device

Device type ☐ MCCB ☐ ACB ☐ Fuse(s) ☐ other

Device rating/setting

Breaking capacity

Attach protective device settings where applicable on separate continuation sheet(s).

If RCD main switch

RCD Type ☐ AC ☐ A ☐ F ☐ B ☐ other

Rated residual operating current (IΔn)

Rated time delay

Measured operating time

Breaking capacity

SECTION K: OBSERVATIONS

Referring to the attached Schedule(s) of Inspection and Schedule(s) of Circuit Details and Schedule(s) of Test Results, and subject to the limitations specified at the Extent and limitations of inspection and testing section D

☐ No remedial action is required ☑ The following observations are made (see below):

NOTE: Photographic and/or thermographic images can be attached to the report to support observations made in this Section.

Item No. C1 and C2 OBSERVATION(S) Include the relevant schedule reference(s), as appropriate Classification code

One of the following codes, as appropriate, has been allocated to each of the observations made above to indicate to the person(s) responsible for the installation the degree of urgency for remedial action. These items affect the overall assessment of the report. C1 – Danger present. Risk of injury. Immediate remedial action is necessary C2 – Potentially dangerous - urgent remedial action is necessary

Item No. C3 and FI OBSERVATION(S) Include the relevant schedule reference(s), as appropriate Classification code

4.9 Circuit chart at the consumer unit is out of date (sample). (Hall cupboard (DB1)) C3

One of the following codes, as appropriate, has been allocated to each of the observations made above to indicate to the person(s) responsible for the installation the advisory nature degree of urgency for remedial action. These items do not affect the overall assessment of the report. C3 – Improvement recommended FI – Further investigation is advised

BS 7671:2018+A4:2026 Page 3 of 8

Page 4 of 8 · Schedule of inspection

CONDITION REPORT SCHEDULE OF INSPECTION FOR RESIDENTIAL AND SIMILAR PREMISES WITH UP TO 100 A SUPPLY

NOTE: This form is suitable for many types of smaller installation, not exclusively residential. The persons responsible for the periodic inspection and testing of the installation should include the relevant items in relation to the electrical installation, the Schedule of Inspection can be reduced or expanded depending on the requirements for the installation.

Outcomes: Acceptable condition ✓ Unacceptable condition C1 or C2 Improvement recommended C3 Further investigation FI Not verified N/V Limitation LIM Not applicable N/A

Outcomes (Use codes above. Provide additional

Item No. Description comment where appropriate. C1, C2, C3 and FI coded items to be recorded in Section K of the Condition Report)

1.0 INTAKE EQUIPMENT (VISUAL INSPECTION ONLY)

An outcome against an item in this section, other than access to live parts, should not be used to determine the overall outcome.

1.1 Distributor/supplier intake equipment

– Service cable ✓

– Service head ✓

– Earthing arrangement ✓

– Meter tails ✓

– Metering equipment ✓

– Means of isolation (where present) ✓

NOTE 1: For this section only, where inadequacies are found, an ‘X’ should be put against the appropriate item and a comment made in Section K.

NOTE 2: Where an inadequacy in the intake equipment is encountered, and where this might result in a dangerous or potentially dangerous situation, the person ordering the inspection and testing and/or dutyholder must be informed. It is strongly recommended that the person ordering the work informs the appropriate authority.

☑ Y ☐ N/A

The person ordering the inspection and testing notified of any dangerous or potentially dangerous situations. (Tick as appropriate.)

1.2 Consumer’s means of isolation (where present) ✓

1.3 Consumer’s meter tails ✓

2.0 PRESENCE OF ADEQUATE ARRANGEMENTS FOR OTHER SOURCES SUCH AS MICROGENERATORS N/A

(551.6; 551.7)

3.0 EARTHING / BONDING ARRANGEMENTS (411.3; Chap 54)

3.1 Presence and condition of distributor’s earthing arrangement (542.1.2.1; 542.1.2.2) ✓

3.2 Presence and condition of earth electrode connection where applicable (542.1.2.3) N/A

3.3 Provision of earthing/bonding labels at all appropriate locations (514.13.1) ✓

3.4 Confirmation of earthing conductor size (542.3; 543.1.1) ✓

3.5 Accessibility and condition of earthing conductor at MET (543.3.2) ✓

3.6 Confirmation of main protective bonding conductor sizes (544.1) ✓

3.7 Condition and accessibility of main protective bonding conductor connections (543.3.2; 544.1.2) ✓

3.8 Accessibility and condition of other protective bonding connections (543.3.1; 543.3.2) ✓

4.0 CONSUMER UNIT(S) / DISTRIBUTION BOARD(S)

4.1 Adequacy of working space/accessibility to consumer unit/distribution board (132.12; 513.1) ✓

4.2 Security of fixing (134.1.1) ✓

4.3 Condition of enclosure(s) in terms of IP rating etc (416.2) ✓

4.4 Condition of enclosure(s) in terms of fire rating etc (421.1.201; 526.5) ✓

4.5 Enclosure not damaged/deteriorated so as to impair safety (651.2) ✓

4.6 Presence of main linked switch (as required by 462.1.201) ✓

4.7 Operation of main switch (functional check) (643.10) ✓

4.8 Manual operation of circuit-breakers and RCDs to prove disconnection (643.10) ✓

4.9 Correct identification of circuit details and protective devices (514.8.1; 514.9.1) C3

4.10 Presence of RCD six-monthly test notice, where required (514.12.2) ✓

4.11 Presence of alternative supply warning notice at or near consumer unit/distribution board (514.15) N/A

4.12 Presence of other required labelling (please specify) (Section 514) ✓

4.13 Compatibility of protective devices, bases and other components; correct type and rating (No signs of ✓

unacceptable thermal damage, arcing or overheating) (411.3.2; 411.4; 411.5; 411.6; Sections 432, 433)

4.14 Single-pole switching or protective devices in line conductor only (132.14.1; 530.3.3) ✓

4.15 Protection against mechanical damage where cables enter consumer unit/distribution board (522.8.1; 522.8.5; ✓

522.8.11)

4.16 Protection against electromagnetic effects where cables enter consumer unit/distribution board/enclosures ✓

(521.5.1)

4.17 RCDs provided for fault protection - includes RCBOs (411.4.204; 411.5.2; 531.2) ✓

4.18 RCDs provided for additional protection/requirements - includes RCBOs (411.3.3; 415.1) ✓

BS 7671:2018+A4:2026 Page 4 of 8

Page 5 of 8 · Schedule of inspection

CONDITION REPORT SCHEDULE OF INSPECTION FOR RESIDENTIAL AND SIMILAR PREMISES WITH UP TO 100 A SUPPLY

NOTE: This form is suitable for many types of smaller installation, not exclusively residential. The persons responsible for the periodic inspection and testing of the installation should include the relevant items in relation to the electrical installation, the Schedule of Inspection can be reduced or expanded depending on the requirements for the installation.

Outcomes: Acceptable condition ✓ Unacceptable condition C1 or C2 Improvement recommended C3 Further investigation FI Not verified N/V Limitation LIM Not applicable N/A

Outcomes (Use codes above. Provide additional

Item No. Description comment where appropriate. C1, C2, C3 and FI coded items to be recorded in Section K of the Condition Report)

4.19 Confirmation of indication that SPD is functional (651.4) ✓

4.20 Confirmation that ALL conductor connections, including connections to busbars, are correctly located in ✓

terminals and are tight and secure (526.1)

4.21 Adequate arrangements where a generating set operates as a switched alternative to the public supply (551.6) N/A

4.22 Adequate arrangements where a generating set operates in parallel with the public supply (551.7) N/A

4.23 Confirmation of indication that AFDD(s) are operational (421.1.7; 532.6; 651.2(e)) N/A

5.0 DISTRIBUTION/FINAL CIRCUITS

5.1 Identification of conductors (514.3.1) ✓

5.2 Cables correctly supported throughout their run (521.10.202; 522.8.5) ✓

5.3 Condition of insulation of live parts (416.1) ✓

5.4 Non-sheathed cables protected by enclosure in conduit, ducting or trunking (521.10.1) • To include the integrity ✓

of conduit and trunking systems (metallic and plastic)

5.5 Adequacy of cables for current-carrying capacity with regard for the type and nature of installation (Section 523) ✓

5.6 Coordination between conductors and overload protective devices (433.1; 533.2.1) ✓

5.7 Adequacy of protective devices: type and rated current for fault protection (411.3; 530.3.201) ✓

5.8 Presence and adequacy of circuit protective conductors (411.3.1; Section 543) ✓

5.9 Wiring system(s) appropriate for the types and nature of the installation and external influences (Section 522) ✓

5.10 Concealed cables installed in prescribed zones (see Section D. Extent of limitations) (522.6.202) ✓

5.11 Cables concealed under floors, above ceilings or in walls/partitions, adequately protected against damage (see ✓

Section D. Extent and limitations) (522.6.204)

5.12 Provision of additional requirements for protection by RCD not exceeding 30 mA • for all socket-outlets of rating ✓

not exceeding 32 A, unless an exception is permitted (411.3.3) • for the supply of mobile equipment not exceeding 32 A rating for use outdoors (411.3.3) • for cables concealed in walls at a depth of less than 50 mm (522.6.202; Table 52.1) • for cables concealed in walls/partitions containing metal parts regardless of depth (Table 52.1) • Final circuits supplying luminaires within domestic (household) premises (411.3.4)

5.13 Provision of fire barriers, sealing arrangements and protection against thermal effects (Section 527) ✓

5.14 Band II cables segregated/separated from Band I cables (528.1) ✓

5.15 Cables segregated/separated from communications cabling (528.2) ✓

5.16 Cables segregated/separated from non-electrical services (528.3) ✓

5.17 Termination of cables at enclosures - indicate extent and location of sampling in Section D of the report (Section ✓

526) • Connections soundly made and under no undue strain (526.6) • No basic insulation of a conductor visible outside enclosure (526.8) • Connections of live conductors adequately enclosed (526.5) • Adequately connected at point of entry to enclosure (glands, bushes etc.) (522.8.5)

5.18 Condition of accessories including socket-outlets, switches and joint boxes (651.2(e)) ✓

5.19 Suitability of accessories for external influences (512.2) ✓

5.20 Adequacy of working space/accessibility to equipment (132.12; 513.1) ✓

5.21 Single-pole switching or protective devices in line conductors only (132.14.1; 530.3.3) ✓

6.0 LOCATION(S) CONTAINING A BATH OR SHOWER

6.1 Additional protection for all low voltage (LV) circuits by RCD not exceeding 30 mA (701.411.3.3) ✓

6.2 Where used as a protective measure, requirements for SELV or PELV (701.414.4.5) N/A

6.3 Shaver supply units comply with BS EN 61558-2-5 formerly BS 3535 (701.512.3) N/A

6.4 Presence of supplementary bonding conductors, where required (701.415.2) N/A

6.5 Low voltage (e.g. 230 V) socket-outlets sited at least 2.5 m from zone 1 (701.512.3) ✓

6.6 Suitability of equipment for external influences for installed location in terms of IP rating (701.512.2) ✓

6.7 Suitability of accessories and controlgear etc. for a particular zone (701.512.3) ✓

6.8 Suitability of current-using equipment for particular position within the location (701.55) ✓

7.0 OTHER PART 7 SPECIAL INSTALLATIONS OR LOCATIONS

7.1 List all other special installations or locations present. (Record separately the results of particular inspections N/A

carried out and attach to the report.)

8.0 PROSUMER’S LOW VOLTAGE ELECTRICAL INSTALLATION(S)

8.1 List all inspection items relating to Chapter 82. (Record separately the results of the particular inspections N/A

carried out and attach to the report.)

Inspected and tested by:

Name (Capitals) ALEX EXAMPLE Date 12/10/2026

Signature [signed – sample signature]

GUIDANCE FOR THE INSPECTOR

1. Section 1.0. Where inadequacies in the intake equipment are encountered the inspector should advise the person ordering the work to inform the appropriate authority. 2. The schedule is not exhaustive. 3. Numbers in brackets are regulation references to specified requirements.

BS 7671:2018+A4:2026 Page 5 of 8

Page 6 of 8 · Schedule of circuit details

GENERIC SCHEDULE OF CIRCUIT DETAILS Certificate/Report No.: SAMPLE-EICR-0001

Distribution board/Consumer unit details

DB/CU reference: DB1 Location: Hall cupboard Supplied from: Origin (meter tails)

Distribution circuit OCPD: BS (EN): BS 88-3 Type: Fuse Rating/Setting: 100 A

SPD Details: Type(s)*: ☐ T1 ☑ T2 ☐ T3† ☐ N/A RCD: BS (EN) Type Rating Rated residual operating current (IΔn):

Column groups: CIRCUIT DETAILS · Conductor details · csa · Overcurrent protective device · RCD

CODES FOR TYPES OF WIRING A Thermoplastic insulated/sheathed cables B Thermoplastic cables in metallic conduit C Thermoplastic cables in non-metallic conduit D Thermoplastic cables in metallic trunking E Thermoplastic cables in non-metallic trunking F Thermoplastic SWA cables G Thermosetting SWA cables H Mineral insulated cables O Other - please state

* SPD Type. Where a combined T1 + T2 or T2 + T3 device is installed, indicate by ticking both Type boxes. † Where a T3 SPD is installed to protect sensitive equipment, enter details in ‘Remarks’, column 31, of the Schedule of Test Results. (See Section 534 of BS 7671:2018+A4:2026.) ‡ See Table 4A2 of Appendix 4 of BS 7671:2018+A4:2026. § Where the maximum permitted earth fault loop impedance value stated in column 12 is taken from a source other than the tabulated values given in Chapter 41 of BS 7671:2018+A4:2026, state the source of the data in the appropriate cell for the circuit in the ‘Remarks’, column 31, of the Schedule of Test Results.

BS 7671:2018+A4:2026 Page 6 of 8

Page 7 of 8 · Schedule of test results

GENERIC SCHEDULE OF TEST RESULTS Certificate/Report No.: SAMPLE-EICR-0001

Distribution board/Consumer unit details Details of test instruments used (serial and/or asset numbers)

DB/CU reference: DB1 Zdb 0.21 Ω Ipf 1.6 kA Multifunction: SAMPLE-MFT-0001

Confirmed: ☑ Correct polarity ☐ Phase sequence Continuity:

SPD: ☑ Operational status confirmed¶ ☐ N/A Insulation resistance:

Earth fault loop impedance:

RCD:

Earth electrode resistance:

Column groups: TEST RESULTS · Ring final circuit · Continuity (Ω) · (R1 + R2) or R2 · V · Insulation resistance · (MΩ) · Zs (Ω) · RCD · AFDD

Tested by name (Capitals): ALEX EXAMPLE

Signature: [signed – sample signature] Date: 12/10/2026

¶ Not all SPDs have visible functionality indication. # An ‘X’, denoting incorrect polarity, cannot be entered on to this schedule when issued with an Electrical Installation Certificate.

** RCD effectiveness is verified using an alternating current test at rated residual operating current (IΔn).

‡‡ Where this schedule forms part of an Electrical Installation Certificate, insulation resistance testing should be performed at the test voltage stated in Table 64. †† Not all AFDDs have a test button.

BS 7671:2018+A4:2026 Page 7 of 8

Page 8 of 8 · Guidance for recipients

GUIDANCE FOR RECIPIENTS (to be appended to the Report)

This Report is an important and valuable document which should be retained for future reference.

1. The purpose of this Report is to confirm, so far as reasonably practicable, whether or not the electrical installation is in a satisfactory condition for continued service at the date of inspection and testing (see Section E). The Report should identify any damage, deterioration, defects, dangerous conditions and/or non-compliances with the requirements of BS 7671, which might give rise to danger (see Section K).

2. This Report is only valid if accompanied by the Schedule(s) of Inspections and the Schedule(s) of Circuit Details and Schedule(s) of Test Results.

3. The person ordering the Report should have received the ‘original’ Report and the inspector should have retained a duplicate.

4. The ‘original’ Report should be retained in a safe place and be made available to any person inspecting or undertaking work on the electrical installation in the future. If the property is vacated, this Report will provide the new owner/occupier with details of the condition of the electrical installation at the time the Report was issued.

5. Section D (Extent and Limitations) should identify fully the extent of the installation covered by this Report and any limitations on the inspection and testing. The inspector should have agreed these aspects with the person ordering the Report and with other interested parties (licensing authority, insurance company, mortgage provider and the like) before the inspection was carried out.

6. Some operational limitations such as inability to gain access to parts of the installation or an item of equipment may have been encountered during the inspection. The inspector should have noted these in Section D.

7. For items classified in Section K as C1 (‘Danger present’), the safety of those using the installation is at risk, and it is recommended that a skilled person or persons competent in electrical installation work undertakes the necessary remedial work immediately.

8. For items classified in Section K as C2 (‘Potentially dangerous’), the safety of those using the installation may be at risk and it is recommended that a skilled person or persons competent in electrical installation work undertakes the necessary remedial work as a matter of urgency.

9. For items classified in Section K as C3 (‘Improvement recommended’), in some cases, remedial work may improve the safety of the installation. However, it should be noted that a C3 recommendation is advisory only and does not affect the overall assessment of the Report.

10. Where further investigation is advised in Section K, this is because the inspection and testing has identified a potential issue for which the inspector is unable to determine a classification code until further investigation has taken place. In such cases it is recommended that further investigations are carried out to obtain the necessary information to allow the inspector to reach a conclusion for the appropriate classification code.

11. For safety reasons, the electrical installation should be re-inspected at appropriate intervals by a skilled person or persons, competent in such work . The recommended date by which the next inspection is due is stated in Section F of the Report under ‘Recommendations’.

12. Where the installation includes a residual current device (RCD) it should be tested six-monthly by pressing the button marked ‘T’ or ‘Test’. The device should switch off the supply and should then be switched on to restore the supply. If the device does not switch off the supply when the button is pressed, seek expert advice. For safety reasons it is important that this instruction is followed.

13. Where the installation includes an arc fault detection device (AFDD) having a manual test facility it should be tested six-monthly by pressing the test button. Where an AFDD has both a test button and automatic test function, manufacturer’s instructions should be followed with respect to test button operation.

14. Where the installation includes a surge protective device (SPD) the status indicator should be checked to confirm it is in operational condition in accordance with manufacturer’s information. If the indication shows that the device is not operational, seek expert advice. For safety reasons it is important that this instruction is followed.

15. Where the installation includes alternative or additional sources of supply, warning notices should be found at the origin or meter position or, if remote from the origin, at the consumer unit or distribution board and at all points of isolation of all sources of supply.

BS 7671:2018+A4:2026 Page 8 of 8