


CONSUMER UNIT & FUSE BOARD UPGRADES
CONSUMER UNIT & FUSE BOARD UPGRADES
Based in Coulsdon, CMD Electrical Services replaces and upgrades outdated consumer units and fuse boards for homes,
landlords and businesses across South London, Surrey and Kent. Our NICEIC-approved electricians assess the existing
installation, fit suitable modern protective equipment, test the completed work and label each circuit clearly.



CONSUMER UNIT & FUSE BOARD UPGRADES
Based in Coulsdon, CMD Electrical Services replaces and upgrades outdated consumer units and fuse boards for homes, landlords and businesses across South London, Surrey and Kent. Our NICEIC-approved electricians assess the existing installation, fit suitable modern protective equipment, test the completed work and label each circuit clearly.



WHEN TO CONSIDER AN UPGRADE
An older or unsuitable fuse board may not provide the level of protection expected from a modern electrical installation. CMD can inspect your existing consumer unit, explain its condition and recommend an upgrade where replacement is appropriate.

A fuse board using rewireable fuses is an older design. An inspection can establish its condition and whether a modern consumer unit would provide more suitable protection.

RCD protection helps reduce the risk of electric shock by disconnecting the supply when certain faults are detected. Older boards may not provide appropriate RCD protection.

Repeated tripping or blown fuses may indicate a circuit, appliance or wiring fault. CMD can investigate the cause before recommending repair or replacement.

Cracks, scorching, unusual heat, loose parts or other visible deterioration around a fuse box or consumer unit require professional inspection.

Planned electrical work may require the existing consumer unit and protective devices to be assessed before new circuits or substantial alterations are added.

Missing labels, limited space, unsuitable protective devices or previous alterations can make an assessment and possible fuse board upgrade appropriate.
Not sure whether your fuse board needs replacing? CMD can inspect it and explain the available options
WHEN TO CONSIDER AN UPGRADE
An older or unsuitable fuse board may not provide the level of protection expected from a modern electrical installation. CMD can inspect your existing consumer unit, explain its condition and recommend an upgrade where replacement is appropriate.

A fuse board using rewireable fuses is an older design. An inspection can establish its condition and whether a modern consumer unit would provide more suitable protection.

RCD protection helps reduce the risk of electric shock by disconnecting the supply when certain faults are detected. Older boards may not provide appropriate RCD protection.

Repeated tripping or blown fuses may indicate a circuit, appliance or wiring fault. CMD can investigate the cause before recommending repair or replacement.

Cracks, scorching, unusual heat, loose parts or other visible deterioration around a fuse box or consumer unit require professional inspection.

Planned electrical work may require the existing consumer unit and protective devices to be assessed before new circuits or substantial alterations are added.

Missing labels, limited space, unsuitable protective devices or previous alterations can make an assessment and possible fuse board upgrade appropriate.
Not sure whether your fuse board needs replacing? CMD can inspect it and explain the available options.
WHEN TO CONSIDER AN UPGRADE
An older or unsuitable fuse board may not provide the level of protection expected from a modern electrical installation. CMD can inspect your existing consumer unit, explain its condition and recommend an upgrade where replacement is appropriate.

A circuit breaker or RCD that repeatedly trips may indicate an overloaded circuit, faulty equipment, damaged wiring or another problem requiring diagnosis.

RCD protection helps reduce the risk of electric shock by disconnecting the supply when certain faults are detected. Older boards may not provide appropriate RCD protection.

Repeated tripping or blown fuses may indicate a circuit, appliance or wiring fault. CMD can investigate the cause before recommending repair or replacement.

Cracks, scorching, unusual heat, loose parts or other visible deterioration around a fuse box or consumer unit require professional inspection.

Damaged cables, exposed conductors and loose electrical connections can affect reliability and create risks of electric shock, overheating or fire.

Missing labels, limited space, unsuitable protective devices or previous alterations can make an assessment and possible fuse board upgrade appropriate.
Not sure whether your fuse board needs replacing? CMD can inspect it and explain the available options.
OUR INSTALLATION PROCESS
A consumer unit replacement involves more than fitting a new box. CMD assesses the existing electrical installation, recommends suitable equipment, completes the changeover safely and tests the finished work before the supply is returned to service.
01
We inspect the current fuse board or consumer unit and assess the circuits, earthing arrangements and visible condition of the electrical installation.
02
CMD explains whether replacement is recommended, what equipment is suitable for the property and what work is included before the upgrade proceeds.
03
The electrical supply is isolated safely, the old board is removed and the new consumer unit is fitted with protective devices selected for the installation.
04
The completed installation is tested, circuits are labelled clearly and the new consumer unit is checked before the electrical supply is restored.
OUR INSTALLATION PROCESS
A consumer unit /fuse box replacement involves more than fitting a new box. CMD assesses the existing electrical installation, recommends suitable equipment, completes the changeover safely and tests the finished work before the supply is returned to service.
01
We inspect the current fuse board or consumer unit and assess the circuits, earthing arrangements and visible condition of the electrical installation.
02
CMD explains whether replacement is recommended, what equipment is suitable for the property and what work is included before the upgrade proceeds.
03
The test results are assessed systematically to identify whether the fault involves the wiring, a circuit, an electrical accessory, protective equipment or connected appliances.
04
The completed installation is tested, circuits are labelled clearly and the new consumer unit is checked before the electrical supply is restored.
OUR INSTALLATION PROCESS
A consumer unit replacement involves more than fitting a new box. CMD assesses the existing electrical installation, recommends suitable equipment, completes the changeover safely and tests the finished work before the supply is returned to service.
01
We inspect the current fuse board or consumer unit and assess the circuits, earthing arrangements and visible condition of the electrical installation.
02
CMD explains whether replacement is recommended, what equipment is suitable for the property and what work is included before the upgrade proceeds.
03
The electrical supply is isolated safely, the old board is removed and the new consumer unit is fitted with protective devices selected for the installation.
04
The completed installation is tested, circuits are labelled clearly and the new consumer unit is checked before the electrical supply is restored.
HOMES & BUSINESSES
CMD installs and replaces consumer units, fuse boards and commercial distribution boards for homeowners, landlords and businesses across South London, Surrey and Kent. Each upgrade is assessed around the property, the existing installation and the circuits that need protection.
Fuse box replacement and consumer unit upgrades for houses, flats, rental properties and shared residential buildings across South London, Surrey and Kent.
Replacement of old rewireable fuse boards
Protective devices, RCDs where appropriate
Assessment before renovations
Clear circuit identification and labelling
Testing following installation
Assessment and replacement of distribution boards for offices, shops, warehouses, managed premises and other commercial buildings, planned to minimise disruption to operations.
Commercial distribution board replacement
Protective-device and circuit assessment
Flexible around business operating hours
Clear circuit schedules and board labelling
Testing following installation
HOMES & BUSINESSES
CMD installs and replaces consumer units, fuse boards and commercial distribution boards for homeowners, landlords and businesses across South London, Surrey and Kent. Each upgrade is assessed around the property, the existing installation and the circuits that need protection.
Fuse box replacement and consumer unit upgrades for houses, flats, rental properties and shared residential buildings across South London, Surrey and Kent.
Replacement of older rewireable fuse boards
Protective devices, including RCDs where appropriate
Assessment before renovations and new circuits
Clear circuit identification and labelling
Testing following installation
Assessment and replacement of distribution boards for offices, shops, warehouses, managed premises and other commercial buildings, planned to minimise disruption to operations.
Commercial distribution board replacement
Protective-device and circuit assessment
Coordination around business operating hours
Clear circuit schedules and board labelling
Testing following installation
HOMES & BUSINESSES
CMD installs and replaces consumer units, fuse boards and commercial distribution boards for homeowners, landlords and businesses across South London, Surrey and Kent. Each upgrade is assessed around the property, the existing installation and the circuits that need protection.
Fuse box replacement and consumer unit upgrades for houses, flats, rental properties and shared residential buildings across South London, Surrey and Kent.
Replacement of older rewireable fuse boards
Modern protective devices, including RCDs where appropriate
Assessment before renovations and new circuits
Clear circuit identification and labelling
Testing following installation
Assessment and replacement of distribution boards for offices, shops, warehouses, managed premises and other commercial buildings, planned to minimise disruption to operations.
Commercial distribution board replacement
Protective-device and circuit assessment
Coordination around business operating hours
Clear circuit schedules and board labelling
Testing following installation
WHY CHOOSE CMD ELECTRICAL SERVICES
Based in Coulsdon, CMD combines recognised industry approvals, qualified workmanship, clear recommendations and thorough electrical testing to deliver consumer unit and fuse board upgrades for homes, landlords and commercial premises.

We assess the existing board and electrical installation before recommending suitable replacement equipment.

CMD plans the changeover carefully, works efficiently and leaves the property clean and tidy after installation.

As a NICEIC Approved Contractor, CMD completes electrical work safely, professionally and in accordance with current electrical standards.

CMD Electrical Services carries insurance cover of up to £5 million, providing additional reassurance when working in your home or business.

Receive clear advice and straightforward quotations before work begins, so you understand what is required and what it will cost.

We stand behind our workmanship. If you have concerns about our service, we will respond promptly and work to put things right.
WHY CHOOSE CMD ELECTRICAL SERVICES
Based in Coulsdon, CMD combines recognised industry approvals, qualified workmanship, clear recommendations and thorough electrical testing to deliver consumer unit and fuse board upgrades for homes, landlords and commercial premises.

We assess the existing board and electrical installation before recommending suitable replacement equipment.

CMD plans the changeover carefully, works efficiently and leaves the property clean and tidy after installation.

As a NICEIC Approved Contractor, CMD completes electrical work safely, professionally and in accordance with current electrical standards.

CMD Electrical Services carries insurance cover of up to £5 million, providing additional reassurance when working in your home or business.

Receive clear advice and straightforward quotations before work begins, so you understand what is required and what it will cost.

We stand behind our workmanship. If you have concerns about our service, we will respond promptly and work to put things right.
WHY CHOOSE CMD ELECTRICAL SERVICES?
Based in Coulsdon, CMD combines recognised industry approvals, qualified workmanship, clear recommendations and thorough electrical testing to deliver consumer unit and fuse board upgrades for homes, landlords and commercial premises.

We assess the existing board and electrical installation before recommending suitable replacement equipment.

CMD plans the changeover carefully, works efficiently and leaves the property clean and tidy after installation.

As a NICEIC Approved Contractor, CMD completes electrical work safely, professionally and in accordance with current electrical standards.

CMD Electrical Services carries insurance cover of up to £5 million, providing additional reassurance when working in your home or business.

Receive clear advice and straightforward quotations before work begins, so you understand what is required and what it will cost.

We stand behind our workmanship. If you have concerns about our service, we will respond promptly and work to put things right.
TRUSTED BY LOCAL CUSTOMERS
See what customers say about CMD Electrical Services, including professional workmanship, efficient service and help resolving electrical problems.
CUSTOMER REVIEWS
See what customers say about CMD Electrical Services, including professional workmanship, efficient service and help resolving electrical problems.
AREAS WE SERVE
CMD Electrical Services is based in Coulsdon and provides consumer unit, fuse board and distribution board upgrades for homes, landlords and businesses throughout the areas below.



AREAS WE SERVE
CMD Electrical Services is based in Coulsdon and provides consumer unit, fuse board and distribution board upgrades for homes, landlords and businesses throughout the areas below.



AREAS WE SERVE
CMD Electrical Services is based in Coulsdon and provides consumer unit and fuse box upgrades for homes and landlords, as well as distribution board upgrades for businesses, throughout the areas below.



RELATED ELECTRICAL SERVICES
Fault finding may identify the need for urgent assistance, replacement equipment, planned electrical work or a wider inspection. Explore the related services below.
RELATED ELECTRICAL SERVICES
From emergency callouts and fault finding to consumer unit upgrades, EV charger installation and electrical testing, CMD Electrical Services provides domestic and commercial electrical services across Coulsdon, South London, Surrey and Kent.
RELATED ELECTRICAL SERVICES
A consumer unit assessment may identify defective circuits, remedial work or the need for wider electrical testing. Explore the related CMD services below.

When an electrical emergency cannot wait, our electricians are available 24 hours a day to diagnose the problem, make the property safe and carry out the necessary repairs.

From sockets and lighting to repairs, consumer unit upgrades and safety inspections, we provide reliable domestic electrical services for homeowners and landlords across Coulsdon, South London, Surrey & Kent.

From installations and maintenance to testing and repairs, we provide reliable electrical services for offices, shops, warehouses and other commercial premises.

Tripping circuits, power loss, damaged wiring and electrical faults require accurate diagnosis. We locate the source of the problem and complete safe, lasting repairs.

Replace an outdated fuse board with a modern consumer unit designed to improve electrical safety, reliability and compliance with current regulations.

We install reliable electric vehicle charging points for homes and businesses, providing a safe and convenient way to charge your vehicle at your property.

We carry out Electrical Installation Condition Reports for homeowners, landlords and businesses, identifying defects and confirming the condition of the fixed electrical installation.

Professional PAT testing helps businesses, landlords and organisations maintain electrical safety by checking portable appliances for faults, damage and potential risks.
ELECTRICAL REPAIR FAQS
Electrical fault finding combines inspection, specialist diagnostic equipment and systematic electrical testing to identify the affected circuit or component, establish the cause and determine the repair required.
Repeated tripping can result from faulty equipment, an overloaded circuit, damaged wiring, moisture, a loose connection or another problem. Testing is required to establish the actual cause.
Yes. CMD diagnoses and repairs problems affecting electrical sockets, switches, light fittings, lighting circuits and related wiring in domestic and commercial properties.
Electrical faults are not always visible. CMD uses inspection and appropriate electrical testing to narrow down faults affecting concealed wiring, circuit connections and other parts of the fixed electrical installation.
Some faults can be repaired once the cause has been identified. Others may require replacement parts, access to concealed wiring or additional remedial work. CMD will explain the findings and next steps before further work proceeds.
Yes. CMD provides electrical fault finding and repairs for homeowners, landlords and businesses across residential and commercial premises.
Yes. CMD provides 24/7 emergency electrical callouts for urgent faults including power loss, repeated tripping, burning smells, overheating, sparking and damaged wiring.
CMD is based in Coulsdon and provides electrical repairs across South London, Surrey and Kent, including Croydon, Sutton, Bromley, Caterham, Epsom, Reigate, Redhill, Oxted, Orpington and surrounding areas.
CMD Electrical Services is an NICEIC Approved Contractor, SafeContractor Approved company and Aico Expert Installer, with insurance cover of up to £5 million.
Yes. We provide Portable Appliance Testing for businesses, landlords and organisations across South London, Surrey and Kent. PAT testing checks portable electrical equipment for faults, damage and potential safety risks, helping you maintain a safer property or workplace.
Yes. CMD Electrical Services installs additional sockets and lighting for homes, rental properties and commercial premises across Coulsdon, Croydon, South London and Surrey. Contact us to discuss your electrical installation requirements and request a free quote.
CONSUMER UNIT FAQS
Fuse box is the familiar term for the equipment that distributes electricity around a property and protects its circuits. Consumer unit is the modern term commonly used for the same part of a domestic electrical installation.
Replacement may be worth considering if the board uses rewireable fuses, has limited RCD protection, shows damage or overheating, is poorly labelled, lacks space for planned circuits or has been affected by unsuitable alterations. An inspection is required before a recommendation can be made.
Yes. CMD diagnoses and repairs problems affecting electrical sockets, switches, light fittings, lighting circuits and related wiring in domestic and commercial properties.
Age alone does not determine whether replacement is required. The board, protective devices and wider electrical installation need to be assessed. CMD will explain the condition found and whether an upgrade or other remedial work is recommended.
Yes. CMD assists homeowners, landlords and businesses with urgent electrical faults in residential and commercial premises.
Yes. The electrical supply must be isolated while the old fuse board is removed and the new consumer unit is installed. CMD will explain the expected interruption and plan the work to minimise disruption.
Yes. CMD tests the installation associated with the consumer unit replacement, checks the completed work and labels the circuits clearly before handover.
Yes. CMD replaces consumer units in houses, flats and rental properties and upgrades distribution boards in offices, shops, warehouses and other commercial premises.
CMD is based in Coulsdon and provides consumer unit and fuse board upgrades across South London, Surrey and Kent, including Croydon, Sutton, Bromley, Caterham, Epsom, Reigate, Redhill, Oxted, Orpington and surrounding areas.
CMD Electrical Services is an NICEIC Approved Contractor, SafeContractor Approved company and Aico Expert Installer, with insurance cover of up to £5 million.
Tell us about the electrical work you need and where the property is located. CMD Electrical Services will review your enquiry and contact you to discuss the next steps.
ELECTRICAL REPAIR FAQS
Electrical fault finding combines inspection, specialist diagnostic equipment and systematic electrical testing to identify the affected circuit or component, establish the cause and determine the repair required.
Repeated tripping can result from faulty equipment, an overloaded circuit, damaged wiring, moisture, a loose connection or another problem. Testing is required to establish the actual cause.
Yes. CMD diagnoses and repairs problems affecting electrical sockets, switches, light fittings, lighting circuits and related wiring in domestic and commercial properties.
Electrical faults are not always visible. CMD uses inspection and appropriate electrical testing to narrow down faults affecting concealed wiring, circuit connections and other parts of the fixed electrical installation.
Some faults can be repaired once the cause has been identified. Others may require replacement parts, access to concealed wiring or additional remedial work. CMD will explain the findings and next steps before further work proceeds.
Yes. CMD provides electrical fault finding and repairs for homeowners, landlords and businesses across residential and commercial premises.
Yes. CMD provides 24/7 emergency electrical callouts for urgent faults including power loss, repeated tripping, burning smells, overheating, sparking and damaged wiring.
CMD is based in Coulsdon and covers South London, Surrey and Kent, including Croydon, Sutton, Bromley, Caterham, Epsom, Reigate, Redhill, Oxted, Orpington and surrounding areas.
CMD Electrical Services is an NICEIC Approved Contractor, SafeContractor Approved company and Aico Expert Installer, with insurance cover of up to £5 million.

When an electrical emergency cannot wait, our electricians are available 24 hours a day to diagnose the problem, make the property safe and carry out the necessary repairs.

From sockets and lighting to repairs, consumer unit upgrades and safety inspections, we provide reliable domestic electrical services for homeowners and landlords across Coulsdon, South London, Surrey & Kent.

From installations and maintenance to testing and repairs, we provide reliable electrical services for offices, shops, warehouses and other commercial premises.

Tripping circuits, power loss, damaged wiring and electrical faults require accurate diagnosis. We locate the source of the problem and complete safe, lasting repairs.

Replace an outdated fuse board with a modern consumer unit designed to improve electrical safety, reliability and compliance with current regulations.

We install reliable electric vehicle charging points for homes and businesses, providing a safe and convenient way to charge your vehicle at your property.

We carry out Electrical Installation Condition Reports for homeowners, landlords and businesses, identifying defects and confirming the condition of the fixed electrical installation.

Professional PAT testing helps businesses, landlords and organisations maintain electrical safety by checking portable appliances for faults, damage and potential risks.

When an electrical emergency cannot wait, our electricians are available 24 hours a day to diagnose the problem, make the property safe and carry out the necessary repairs.

From sockets and lighting to repairs, consumer unit upgrades and safety inspections, we provide reliable domestic electrical services for homeowners and landlords across Coulsdon, South London, Surrey & Kent.

From installations and maintenance to testing and repairs, we provide reliable electrical services for offices, shops, warehouses and other commercial premises.

Tripping circuits, power loss, damaged wiring and electrical faults require accurate diagnosis. We locate the source of the problem and complete safe, lasting repairs.

Replace an outdated fuse board with a modern consumer unit designed to improve electrical safety, reliability and compliance with current regulations.

We install reliable electric vehicle charging points for homes and businesses, providing a safe and convenient way to charge your vehicle at your property.

We carry out Electrical Installation Condition Reports for homeowners, landlords and businesses, identifying defects and confirming the condition of the fixed electrical installation.

Professional PAT testing helps businesses, landlords and organisations maintain electrical safety by checking portable appliances for faults, damage and potential risks.