Consumer units are most often replaced as part of a refurbishment where new circuits
are required and when connecting to the existing consumer unit which might not meet the latest electrical regulations. It could be that there is no spare capacity in the existing consumer unit to connect the new circuits.
It also may be that the replacement has been a recommendation following an
electrical inspection, or it possibly could be that the existing consumer unit has been damaged requiring a distress change.
The important thing is to understand what’s involved. James Fox Electrical Services demonstrate competence and hold the necessary insurances as well as having the right procedures to assure compliance within our work.
This means that we can provide you with the necessary certificates to demonstrate the
regulatory compliance of the work they do.
Understanding Modern Consumer Units
From 1st January 2017, it has become mandatory for any consumer units installed or replaced in domestic premises
From 1st January 2017, it has become mandatory for any consumer units installed or replaced in domestic premises metal consumer units will be used. Modern consumer units come with various configurations of protective devices and we will be able to give you the best options suited to your installation and budget.
All domestic consumer units will have a main switch and miniature circuit breakers (MCBs) as well as residual currents devices (RCDs/RCBOs).
It is important to understand that compared to older set-ups like fuseboxes, modern devices such as RCDs are designed to detect earth faults, can detect existing circuit faults and can switch off any electrical circuit if a dangerous situation arises.
It’s not uncommon for an existing installation to have underlying faults not picked up by an old fusebox. Therefore, if there were any underlying issues within an existing installation they need to be found prior to the consumer unit being replaced. If not,then it is likely that the RCD would detect the issue and switch off, leading to an unsatisfactory situation for you and us since you would have no power and we would not be able to issue the correct completion certification without first addressing the issue.
Are There Any Checks to be Made Prior to Fitting a New
Yes, replacing a consumer unit is classed as making an alteration and falls into the category of new work. Electrical Regulations require existing equipment that must be adequate for the alteration, as well as the earthing and bonding.
What is the Recommended Best Practice?
Prior to the consumer unit being replaced, an Electrical Installation Condition Report (EICR) should be carried out. This provides a summary of the condition of the installation,
allowing a decision to be made on how to proceed with the planned consumer unit change. The report would give details of any observations classed as being immediately or potentially dangerous or requiring further investigation. The report would also list any recommendations noted during the inspection.
What If I Choose Not to Have an EICR Carried Out?
Our electricians should be given sufficient time to carry out visual checks as well as essential tests. This is known as a pre-work survey and will provide limited information on the installation. This would involve your power being switched off for a short period.
Whilst this method should indicate the suitability of the installation for the consumer
unit replacement, it will not be as conclusive as an EICR. You should be aware that following the consumer unit replacement, during final inspection and testing, if any observations classed as being immediately or potentially dangerous, or requiring further investigation are found, then those circuits will not be reconnected.
What Paperwork Should I Expect to Receive?
Replacing a consumer unit is classed as new work and therefore will require an Electrical Installation Certificate to be issued, and this would also require a Building Control Compliance Certificate, which you will receive from NAPIT registered electrician James Fox Electrical Services
By choosing an electrician registered with NAPIT’s competent persons scheme, you
will be issued with the correct compliance certificates which you may need should you
come to sell or rent your home.
Modernised 17th edition split load rcd protected 8 way consumer unit.
Domestic and commercial consumer units
Usually installed in outbuildings to provide small power and lighting.
Installed in most everyday house dwellings to provide power and lighting.
This would include a 10 way split load RCD consumer unit.
The Difference with an rcbo is that each individual circuit is RCD protected rather than a split load where the indivdual circuits would be split between two MAIN RCD switches.
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