How to Complete a Multiple Minor Works Certificate
The Multiple Minor Electrical Installation Works Certificate is used when several pieces of minor electrical work are carried out at the same location. This guide walks through every section of the form so you can complete it accurately and issue it to your client.
Before you begin
A Multiple Minor Works certificate covers up to five separate pieces of minor electrical work on the same installation - for example, adding several sockets across different rooms. Each piece of work gets its own description field. If only one piece of work is being carried out, use the standard Minor Works certificate instead. If any of the work involves a new circuit, you need an EIC.
The certificate is split into three parts: description of the minor works (with up to five descriptions), earthing and bonding, and a declaration. You also add one or more distribution boards with circuit-level test results. You can save your progress at any time and come back later.
Getting started
Navigate to Certificates → Create and select Multiple Minor Works as the certificate type. If you don't have any certificates yet, the type selection will appear directly on the certificates page; otherwise you'll be taken to a separate form. Choose the client and installation address for the job. If the client doesn't exist yet, you can create them inline without leaving the form.
Certificate details
After selecting the certificate type, you'll be taken to the create form. Here you set the basic details before moving on to the certificate itself.
A descriptive name to help you identify the certificate later. This could be the project name, location, or type of work. A default is generated automatically, but you can change it to something more meaningful.
A unique number for the certificate. This is generated automatically based on your numbering settings and increments with each new certificate.
Optionally link the certificate to a saved client. Selecting a client will pre-fill their name and address into the form. You can also create a new client inline without leaving the page. This field can be left empty if you prefer to enter the details manually.
Linking a saved client to the certificate means it will appear on that client’s details page, making it easy to find all certificates for a particular client. If you type the client name as plain text in Part 1 instead, the certificate won’t be linked to a client record.
Part 1 - Description of the Minor Works
This section captures who the work was done for, where, and what was carried out. Unlike the standard Minor Works certificate, this form includes up to five separate description fields so you can document multiple pieces of work on a single certificate.
The name of the person or company the work was carried out for.
The date the electrical work was finished on site.
The full address where the work was carried out, split across four fields (address line 1, line 2, line 3, and postcode). Filled automatically from the selected client address, or enter manually.
Up to five separate descriptions of the work carried out. Each description should be specific enough that another electrician could understand the scope - e.g. “Addition of a double socket outlet to an existing ring final circuit in the kitchen.” Use as many fields as needed; leave unused ones blank.
Whether a risk assessment is attached. Select Yes to indicate one is attached, No if one has not been attached, or N/A if not applicable.
Record any departures from BS 7671 and the reasons for them. Leave blank if there are none.
Note any relevant observations about the existing installation - e.g. “Existing installation in satisfactory condition.”
Tip: Be specific in each description. “Socket added” is too vague. Include the circuit affected, the location, and the type of accessory installed. You only need to fill in descriptions for the work you actually carried out - unused fields can be left blank.
Part 2 - Earthing and Bonding Arrangements
Confirm the earthing system type and verify that adequate protective bonding is in place. This section satisfies the requirements of Regulation 132.16.
Select the earthing system: TN-S, TN-C-S, or TT. Check the supply intake or ask the DNO if unsure.
The measured earth fault loop impedance at the distribution board, in ohms. This is needed to verify disconnection times.
Tick to confirm that the main earthing conductor is present and of adequate size.
Whether main protective bonding to the water service is present.
Whether main protective bonding to the gas service is present.
Whether main protective bonding to the oil supply is present.
Whether main protective bonding to structural steel is present.
Any other extraneous-conductive-parts that require bonding. If selected, a text field appears to specify what it is.
Part 3 - Declaration
The declaration confirms that the work complies with BS 7671 (as amended) and that the installation has been designed, constructed, inspected, and tested in accordance with the standard. This is a legal statement - ensure all details are correct before signing.
Your full name as the person responsible for the work.
Your typed signature for the digital certificate.
The company or trading name you are signing on behalf of.
Your role within the company - e.g. “Director”, “Qualified Supervisor”.
The business address of the contractor or company.
The date the certificate is being signed and issued.
Tip: You can fill in these details once in your Profile settings. SparkCert will then pre-fill them automatically on every new certificate, so you don’t have to type them out each time.
Distribution boards and test results
The schedule of test results is organised by distribution board. Add a schedule for each DB in the installation, then fill in the board details, test instrument information, and circuit-level test results. Most domestic installations will have a single board, but you can add as many as needed.
Board details
The distribution board reference - auto-generated as DB1, DB2, etc. You can change this to match your own numbering.
Where the distribution board is located - e.g. “Hallway”, “Garage”.
What supplies this board - e.g. “Main intake” or the reference of another DB.
Distribution circuit overcurrent protective device (OCPD)
The standard number for the overcurrent protective device feeding this board.
The type characteristic of the OCPD - options update based on the BS (EN) selected.
The current rating or setting of the OCPD in amps.
SPD, impedance, and confirmations
Select the surge protection device type: T1, T2, T3, or N/A if no SPD is fitted.
The earth fault loop impedance at the distribution board, in ohms.
The protective fault current at the distribution board, in kA.
Tick to confirm correct polarity at the distribution board.
Confirm correct phase sequence for three-phase installations. Select Yes, No, or N/A for single-phase.
Two checkboxes: tick Operational status confirmed to confirm the SPD is functioning correctly, or tick N/A if no SPD is fitted.
Test instruments
Record the serial or asset numbers of the instruments used for testing. Use the autofill button to populate these from your saved instrument details.
Serial/asset number of the multifunction tester.
Serial/asset number of the continuity tester (if separate from multifunction).
Serial/asset number of the insulation resistance tester.
Serial/asset number of the loop impedance tester.
Serial/asset number of the RCD tester.
Serial/asset number of the earth electrode resistance tester (if applicable).
Tested by
Full name of the person who carried out the testing.
Typed signature for the digital certificate.
The date the testing was carried out. Defaults to today’s date.
Circuit details table
Below the board header is a spreadsheet-style table where you enter the test results for each circuit. Add a row for every circuit in the distribution board. The table includes columns for circuit description, reference method, conductor sizes, OCPD details, RCD details, and all test measurements (continuity, insulation resistance, polarity, earth fault loop impedance, and RCD operating times).
Tip: You can add multiple distribution boards by clicking the “Add board” button in the Schedule of Test Results section. Each board gets its own header, test instruments, and circuit table.
Issuing the certificate
Once you’ve completed all three parts and your distribution board test results, review the certificate for accuracy and issue it. Issuing the certificate locks it to prevent accidental edits, and you can then download the PDF or email it directly to your client from SparkCert.
If you need to make corrections after issuing, you can unlock the certificate, make your changes, and re-issue it.