Advice and FAQ's
Find answers to the most common questions about domestic, commercial and renewable electrical services, click on any of the topics below to see FAQ's.
Consumer Unit Upgrade FAQ's
How do I know if my consumer unit needs replacing?
Older consumer units may not meet current electrical safety standards. If your fuse board contains rewireable fuses, frequently trips, shows signs of damage or was installed many years ago, it may be time for an upgrade. An Electrical Installation Condition Report (EICR) can determine whether replacement is recommended.
How much does a consumer unit replacement cost?
The cost depends on the size of your property, the number of circuits and the condition of the existing electrical installation. We provide free, no-obligation quotations and explain exactly what's included before any work begins.
How long does it take to replace a fuse board?
Most consumer unit replacements are completed within one working day, including installation, testing and certification.
Will my electricity be turned off during the work?
Yes. The electrical supply will need to be safely isolated while the existing consumer unit is removed and the new one is installed. We'll restore power as quickly as possible once testing has been completed.
Do I receive a certificate after a consumer unit replacement?
Yes. Every installation includes full inspection and testing, followed by an Electrical Installation Certificate (EIC). Where applicable, the work is also notified under Building Regulations Part P.
Can you replace old fuse boxes?
Yes. We regularly replace outdated fuse boxes with modern consumer units that provide improved protection through RCBOs, RCDs and surge protection where appropriate.
What is an RCBO?
An RCBO is a protective device that combines overload, short circuit and earth fault protection into a single unit. It protects each circuit individually, meaning a fault on one circuit is less likely to affect the rest of your home.
What is a Surge Protection Device (SPD)?
A Surge Protection Device helps protect sensitive electrical equipment from voltage spikes caused by lightning strikes or fluctuations in the electricity network. Many new consumer units now include SPD protection as standard or as a recommended upgrade.
How often should a consumer unit be replaced?
There is no fixed replacement interval. However, if your consumer unit is over 20 years old or no longer provides modern safety protection, it should be inspected by a qualified electrician.
Can I replace a consumer unit myself?
No. Consumer unit replacement is not a DIY job. It must be carried out by a qualified electrician who can safely test the installation, issue the correct certification and ensure compliance with the latest Wiring Regulations and Building Regulations.
Will replacing my consumer unit stop my electrics from tripping?
Not always, but it can help if the existing fuse board is outdated or faulty. If the tripping is caused by an appliance or damaged wiring, further fault finding may be required. We always test the installation to identify any underlying issues.
Does every new consumer unit include surge protection?
Current wiring regulations recommend surge protection for most domestic installations. We'll advise whether an SPD is required for your property and include it where appropriate.
Can you replace a consumer unit after an EICR?
Yes. If an EICR identifies that your existing consumer unit is unsafe or no longer meets current standards, we can carry out the replacement, complete any associated remedial work and provide all necessary certification.
Why choose GJK Electrical Contractors for a consumer unit upgrade?
Our NAPIT-registered electricians provide professional consumer unit upgrades throughout Northampton and Northamptonshire. Every installation is fully tested, certified and completed to the latest BS 7671 Wiring Regulations, giving you complete peace of mind.
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EICR Reports and Electrical Safety FAQ's
How do I know if my consumer unit needs replacing?
Older consumer units may not meet current electrical safety standards. If your fuse board contains rewireable fuses, frequently trips, shows signs of damage or was installed many years ago, it may be time for an upgrade. An Electrical Installation Condition Report (EICR) can determine whether replacement is recommended.
How much does a consumer unit replacement cost?
The cost depends on the size of your property, the number of circuits and the condition of the existing electrical installation. We provide free, no-obligation quotations and explain exactly what's included before any work begins.
How long does it take to replace a fuse board?
Most consumer unit replacements are completed within one working day, including installation, testing and certification.
Will my electricity be turned off during the work?
Yes. The electrical supply will need to be safely isolated while the existing consumer unit is removed and the new one is installed. We'll restore power as quickly as possible once testing has been completed.
Do I receive a certificate after a consumer unit replacement?
Yes. Every installation includes full inspection and testing, followed by an Electrical Installation Certificate (EIC). Where applicable, the work is also notified under Building Regulations Part P.
Can you replace old fuse boxes?
Yes. We regularly replace outdated fuse boxes with modern consumer units that provide improved protection through RCBOs, RCDs and surge protection where appropriate.
What is an RCBO?
An RCBO is a protective device that combines overload, short circuit and earth fault protection into a single unit. It protects each circuit individually, meaning a fault on one circuit is less likely to affect the rest of your home.
What is a Surge Protection Device (SPD)?
A Surge Protection Device helps protect sensitive electrical equipment from voltage spikes caused by lightning strikes or fluctuations in the electricity network. Many new consumer units now include SPD protection as standard or as a recommended upgrade.
How often should a consumer unit be replaced?
There is no fixed replacement interval. However, if your consumer unit is over 20 years old or no longer provides modern safety protection, it should be inspected by a qualified electrician.
Can I replace a consumer unit myself?
No. Consumer unit replacement is not a DIY job. It must be carried out by a qualified electrician who can safely test the installation, issue the correct certification and ensure compliance with the latest Wiring Regulations and Building Regulations.
Will replacing my consumer unit stop my electrics from tripping?
Not always, but it can help if the existing fuse board is outdated or faulty. If the tripping is caused by an appliance or damaged wiring, further fault finding may be required. We always test the installation to identify any underlying issues.
Does every new consumer unit include surge protection?
Current wiring regulations recommend surge protection for most domestic installations. We'll advise whether an SPD is required for your property and include it where appropriate.
Can you replace a consumer unit after an EICR?
Yes. If an EICR identifies that your existing consumer unit is unsafe or no longer meets current standards, we can carry out the replacement, complete any associated remedial work and provide all necessary certification.
Why choose GJK Electrical Contractors for a consumer unit upgrade?
Our NAPIT-registered electricians provide professional consumer unit upgrades throughout Northampton and Northamptonshire. Every installation is fully tested, certified and completed to the latest BS 7671 Wiring Regulations, giving you complete peace of mind.
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Domestic Electrical FAQ's
What domestic electrical services do you provide?
We provide a full range of domestic electrical services throughout Northampton and Northamptonshire. Whether you need a new socket installed, a consumer unit upgrade, an Electrical Installation Condition Report (EICR), fault finding, lighting installation or a full house rewire, our NAPIT-registered electricians deliver safe, reliable and high-quality workmanship.
How do I know if I need an electrician?
If you're experiencing frequent power trips, flickering lights, burning smells, damaged sockets or switches, or you're planning home improvements involving electrical work, it's always best to speak to a qualified electrician. Electrical faults should never be ignored as they can become dangerous if left unresolved.
Can you install additional sockets?
Yes. We install additional sockets throughout your home, including USB sockets, outdoor sockets and dedicated circuits for appliances. Whether you're renovating a room or simply need more convenient power points, we can advise on the best solution.
Can you replace light fittings?
Yes. We install all types of internal and external lighting, including LED lighting, pendant lights, downlights, wall lights, security lighting and garden lighting. We can also help upgrade existing lighting to more energy-efficient LED solutions.
Do you install outdoor sockets and lighting?
Yes. We install weatherproof outdoor sockets, garden lighting, security lighting and power supplies for sheds, garages, hot tubs and garden offices, ensuring all installations are suitable for outdoor use.
Can you carry out a full house rewire?
Yes. We carry out both full and partial rewires for homes of all sizes. If your property's wiring is outdated, damaged or no longer meets current standards, we'll assess the installation and recommend the most appropriate solution.
How do I know if my home needs rewiring?
Signs that your property may require rewiring include frequent electrical faults, old rubber or fabric-insulated cables, discoloured sockets or switches, outdated fuse boards and a lack of modern safety protection. An EICR can help determine the condition of your wiring.
Why do my lights keep flickering?
Flickering lights can be caused by loose connections, faulty light fittings, overloaded circuits or issues with the electrical installation. While some causes are minor, others may indicate a more serious fault that should be investigated by a qualified electrician.
Why does my fuse board keep tripping?
Frequent tripping usually indicates an electrical fault, overloaded circuit or faulty appliance. Our electricians can carry out professional fault finding to identify the cause and recommend the most appropriate repair.
Can you install smoke alarms?
Yes. We install and replace mains-powered smoke alarms, heat alarms and carbon monoxide detectors to help protect your home and comply with current safety recommendations.
Are your electricians qualified and insured?
Yes. Our electricians are NAPIT registered, fully insured and committed to carrying out all work safely, professionally and in accordance with the latest BS 7671 Wiring Regulations.
Do I need certification for domestic electrical work?
Many electrical installations require testing and certification to confirm they comply with current regulations. Where applicable, we'll provide the appropriate certificates and notify Building Control under Part P of the Building Regulations.
How quickly can you provide a quotation?
We aim to provide prompt, no-obligation quotations for all domestic electrical work. Following an initial discussion or site visit, we'll explain the work required and provide a clear, transparent estimate.
Do you work in occupied homes?
Yes. Most of our work is carried out in occupied homes. We always take care to minimise disruption, protect your property and leave the work area clean and tidy when the job is complete.
Why choose GJK Electrical Contractors for domestic electrical work?
We pride ourselves on providing reliable, professional and high-quality domestic electrical services across Northamptonshire. Whether it's a small repair or a complete electrical installation, our focus is on safety, workmanship and excellent customer service. As NAPIT-registered electricians, you can be confident your home is in safe hands.
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Commercial Electrical FAQ's
What commercial electrical services do you provide?
GJK Electrical Contractors provide a comprehensive range of commercial electrical services throughout Northampton and Northamptonshire. We work with offices, warehouses, retail units, industrial premises, schools, healthcare facilities and commercial landlords, delivering safe, reliable and fully compliant electrical installations, maintenance and testing.
What types of commercial properties do you work in?
We work across a wide range of commercial environments including offices, retail premises, warehouses, industrial units, schools, healthcare facilities, hospitality venues, commercial developments and managed properties. Whether it's a small office refurbishment or a large-scale installation, we tailor our services to your business.
Can you carry out commercial electrical installations?
Yes. We undertake new electrical installations, alterations and upgrades for commercial properties of all sizes. Every installation is completed to the latest BS 7671 Wiring Regulations and designed to meet the needs of your business.
Do you provide commercial Electrical Installation Condition Reports (EICRs)?
Yes. We carry out commercial EICRs for businesses, landlords and property managers, helping ensure electrical installations remain safe, compliant and suitable for continued use. We'll provide a detailed report along with clear recommendations if any remedial work is required.
Do you install three-phase electrical systems?
Yes. We install, modify and maintain three-phase electrical systems for commercial and industrial premises. Whether you're expanding your business, installing new machinery or upgrading your electrical infrastructure, we can provide a safe and reliable solution.
Can you install emergency lighting?
Yes. We install, test and maintain emergency lighting systems to help businesses comply with current fire safety regulations and ensure safe evacuation in the event of a power failure.
Do you provide electrical maintenance for businesses?
Yes. Planned electrical maintenance helps reduce unexpected breakdowns, improve safety and extend the lifespan of your electrical installation. We can tailor maintenance programmes to suit your business and operational requirements.
Can you carry out electrical work outside normal business hours?
Yes. Where possible, we can schedule work outside your normal operating hours to minimise disruption to staff, customers and day-to-day business activities.
Are your commercial electricians fully qualified?
Yes. Our electricians are NAPIT registered, fully insured and experienced in delivering commercial electrical projects safely, professionally and in accordance with current electrical regulations.
Can you provide electrical services for landlords and managing agents?
Yes. We regularly work with landlords, letting agents and property management companies, providing EICRs, remedial works, consumer unit upgrades, emergency repairs and ongoing maintenance for commercial and residential portfolios.
Can you help with office refurbishments and fit-outs?
Yes. We provide electrical installations for office refurbishments, including lighting, power distribution, data cabling routes, emergency lighting and additional socket installations to suit changing business needs.
Do you install LED lighting for commercial buildings?
Yes. We install energy-efficient LED lighting systems that can help reduce electricity consumption, lower maintenance costs and improve workplace lighting quality.
Can you upgrade commercial distribution boards?
Yes. We replace and upgrade commercial distribution boards where required, improving safety, reliability and compliance with current electrical standards.
Can you carry out fault finding in commercial properties?
Yes. Our electricians can quickly identify and diagnose electrical faults affecting commercial premises, helping minimise downtime and restore normal operation as efficiently as possible.
Why choose GJK Electrical Contractors for commercial electrical work?
GJK Electrical Contractors have extensive experience delivering commercial electrical services for businesses across Northamptonshire. From office refurbishments and industrial installations to commercial testing and maintenance, we focus on providing dependable workmanship, clear communication and practical electrical solutions that keep your business operating safely and efficiently.
Can't find the answer you're looking for?
If you have a question about commercial electrical services that isn't covered here, we're happy to help. Contact GJK Electrical Contractors for free advice and a no-obligation quotation for your business.
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Solar PV and Battery Storage FAQ's
What are the benefits of installing solar panels?
Solar panels allow you to generate your own electricity from sunlight, helping to reduce your reliance on the National Grid. A professionally installed solar PV system can lower your electricity bills, reduce your carbon footprint and increase your energy independence for many years.
Is solar worth installing in the UK?
Yes. Even with the UK's climate, modern solar panels continue to generate electricity throughout the year. While output is naturally higher during the summer months, solar PV systems can still produce useful energy on cloudy days and throughout the winter.
How much money can solar panels save me?
The amount you can save depends on factors such as your electricity usage, roof size, panel orientation and whether you install battery storage. Homes that use more of the electricity they generate generally achieve the greatest savings.
How long do solar panels last?
Most quality solar panels are designed to last 25 years or more. While efficiency gradually reduces over time, modern panels continue producing electricity for many years with very little maintenance.
Do solar panels work on cloudy days?
Yes. Solar panels generate electricity whenever there is daylight, not just in direct sunshine. Although output is lower on overcast days, your system will continue producing electricity throughout the year.
What is battery storage?
Battery storage allows you to store excess electricity generated by your solar panels instead of exporting it back to the grid. You can then use this stored energy during the evening or at times when your solar panels aren't producing electricity.
Do I need a battery with solar panels?
No. Solar panels work perfectly well without a battery. However, adding battery storage allows you to make better use of the electricity you generate, helping to maximise your savings and reduce the amount of electricity you buy from the grid.
Can I add a battery to an existing solar system?
Yes. In many cases, battery storage can be added to an existing solar PV installation. We'll assess your current system and recommend the most suitable battery solution for your property.
Will my battery work during a power cut?
Not all battery systems automatically provide backup power during a power outage. This depends on the battery and inverter installed, as well as whether an Emergency Power Supply (EPS) has been included as part of the system design.
How long do solar batteries last?
Most modern battery storage systems are designed to last between 10 and 15 years, depending on the manufacturer, usage and charging cycles. Many manufacturers also provide long-term warranties for added peace of mind.
Can solar panels charge my electric vehicle?
Yes. Many EV chargers can be integrated with your solar PV system, allowing you to charge your electric vehicle using electricity generated from your own roof whenever conditions allow.
Do solar panels need much maintenance?
Solar panels require very little maintenance. Keeping them reasonably clean and arranging occasional inspections will help ensure they continue operating efficiently for many years.
Do I need planning permission for solar panels?
Most domestic solar panel installations fall under permitted development rights and don't require planning permission. However, there may be exceptions for listed buildings, conservation areas or certain property types.
Can solar panels increase the value of my home?
Energy-efficient improvements such as solar PV may make a property more attractive to potential buyers by reducing running costs and improving its energy performance.
Can you install solar panels and battery storage together?
Yes. We design and install complete solar PV and battery storage systems tailored to your property's energy requirements, helping you make the most of the electricity you generate.
Why choose GJK Electrical Contractors for solar and battery storage?
GJK Electrical Contractors provide professional solar PV and battery storage installations across Northampton and Northamptonshire. We take the time to understand your energy needs, recommend the right system for your property and complete every installation to the highest standards, helping you maximise your investment for years to come.
Can't find the answer you're looking for?
If you have a question about solar panels or battery storage that isn't covered here, we'd be happy to help. Contact GJK Electrical Contractors for free advice and a no-obligation quotation.
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EV Charger FAQ's
Why should I install a home EV charger?
A home EV charger is the fastest, safest and most convenient way to charge your electric vehicle. It provides faster charging than a standard three-pin plug and allows you to charge your vehicle overnight, so it's ready whenever you need it.
Can I charge my electric vehicle from a standard plug socket?
While it is possible, it's generally intended as a temporary solution. A dedicated EV charger is much safer, charges significantly faster and is specifically designed for regular vehicle charging.
How long does it take to install an EV charger?
Most domestic EV charger installations can be completed within a single day. The exact time depends on your property's electrical installation and the location of the charger.
Do I need a new consumer unit before installing an EV charger?
Not always. Before installation, we'll assess your existing electrical system to ensure it can safely support an EV charger. If upgrades are required, we'll explain your options and provide a clear quotation.
Can I install an EV charger outside my house?
Yes. EV chargers are designed for outdoor installation and are built to withstand the UK's weather conditions. We can recommend the most practical location for convenient and safe charging.
Can an EV charger be installed anywhere?
In most cases, yes. We aim to position the charger where it's both convenient and practical, taking into account cable routes, parking arrangements and your property's electrical supply.
Can I use my solar panels to charge my electric vehicle?
Yes. Many modern EV chargers can work alongside solar PV systems, allowing you to charge your vehicle using electricity generated by your own solar panels whenever sufficient energy is available.
Will an EV charger increase my electricity bill?
Charging your vehicle will increase your electricity usage, but charging at home is usually much cheaper than using public charging points. If you have solar panels or an off-peak electricity tariff, your running costs can be reduced even further.
Can more than one electric vehicle use the same charger?
Yes. Most home chargers can be used to charge different electric vehicles, provided they use compatible charging connectors.
Do I need planning permission for an EV charger?
Most domestic EV charger installations do not require planning permission. However, there may be exceptions for listed buildings or certain types of property.
Can you install EV chargers for businesses?
Yes. We install EV charging solutions for commercial premises, offices, retail parks, industrial units and workplaces, helping businesses support employees, customers and fleet vehicles.
What type of EV charger should I choose?
The best charger depends on your vehicle, driving habits and future requirements. We'll help you choose a charger that offers the right balance of performance, smart features and value for money.
Do smart EV chargers save money?
Yes. Many smart chargers allow you to schedule charging during off-peak electricity periods, helping reduce charging costs. Some can also integrate with solar PV systems to maximise self-generated electricity.
Are EV chargers safe?
Yes. Professionally installed EV chargers include multiple safety features and are designed specifically for vehicle charging. Every installation is fully tested and certified before being put into service.
Why choose GJK Electrical Contractors for your EV charger installation?
Our experienced electricians provide professional EV charger installations for homes and businesses across Northampton and Northamptonshire. We'll assess your property's electrical installation, recommend the most suitable charger and complete the installation safely, efficiently and in accordance with current electrical regulations.
Can't find the answer you're looking for?
If you have a question about EV charger installations that isn't covered here, our team is happy to help. Contact GJK Electrical Contractors for free advice and a no-obligation quotation.
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General FAQ's
Are your electricians fully qualified?
Yes. All work is carried out by experienced, NAPIT-registered electricians who work in accordance with the latest BS 7671 Wiring Regulations. We take pride in delivering safe, professional and high-quality electrical installations for both domestic and commercial customers.
Are you NAPIT registered?
Yes. GJK Electrical Contractors are NAPIT registered, giving our customers confidence that all work is carried out to recognised industry standards and complies with current electrical regulations.
Are you fully insured?
Yes. We are fully insured for the electrical work we undertake, giving our customers complete peace of mind from start to finish.
What areas do you cover?
Based in Northampton, we provide electrical services throughout Northamptonshire and the surrounding areas. If you're unsure whether we cover your location, simply get in touch and we'll be happy to help.
Do you offer free quotations?
Yes. We provide free, no-obligation quotations for domestic, commercial and renewable energy projects. We'll discuss your requirements, assess the work involved and provide a clear, transparent quotation with no hidden costs.
How quickly can you provide a quotation?
We aim to respond to all enquiries as quickly as possible. In many cases we can provide an estimate from the information you provide, while larger projects may require a site visit to prepare an accurate quotation.
How soon can you start work?
Our availability varies depending on the type of work and current workload. We'll always do our best to accommodate urgent jobs where possible and will provide an estimated timescale when we discuss your enquiry.
Do you carry out emergency electrical repairs?
Yes. If you're experiencing an electrical fault or unsafe situation, please contact us as soon as possible. We'll assess the issue and advise on the quickest and safest course of action.
Can you help if my electrics keep tripping?
Yes. Frequent tripping is often a sign of an electrical fault that should be investigated. We provide professional fault finding services to identify the cause and recommend the appropriate repair.
Do you guarantee your work?
We take great pride in the quality of our workmanship and complete every installation to current industry standards. If you have any questions after the work has been completed, we're always happy to help.
Do you clean up after the work is finished?
Absolutely. We treat every property with respect, protect the work area where possible and leave everything clean and tidy once the job is complete.
Can I carry out electrical work myself?
Simple tasks such as changing a light bulb are generally safe, but most electrical work should only be carried out by a qualified electrician. Incorrect electrical work can be dangerous and may not comply with current regulations.
Why should I choose GJK Electrical Contractors?
We believe in providing honest advice, reliable workmanship and excellent customer service. Whether you need a small domestic repair, a commercial electrical installation or a renewable energy solution, our experienced team is committed to delivering high-quality work that you can trust.
How do I book an electrician?
Booking with GJK Electrical Contractors is simple. You can call us, send us an email or complete the enquiry form on our website. We'll discuss your requirements, answer any questions you may have and arrange a convenient time to provide a quotation or carry out the work.
Need More Help?
If you can't find the answer you're looking for, we're here to help. Whether you have a question about domestic electrical work, commercial installations, EICRs, consumer unit upgrades, solar PV, battery storage or EV charger installations, our experienced team is always happy to offer honest advice.
📞 Call GJK Electrical Contractors
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Why Choose GJK Electrical?
When you choose GJK Electrical Contractors, you're choosing a Northampton-based electrical company committed to quality, safety and customer satisfaction.
We work with homeowners, landlords and businesses across Northamptonshire, delivering reliable electrical services completed to the highest professional standards.
✔ NAPIT Registered
✔ Fully Insured
✔ Domestic & Commercial Specialists
✔ Solar PV & Battery Storage Experts
✔ EV Charger Installers
✔ Free Quotations
✔ Professional Workmanship
✔ Friendly, Reliable Service
