--- title: "Electrical Advice & Guides | 24/7 Electrical Blog" description: "Honest, expert guides on EICRs, rewiring, EV chargers and home electrical safety from a 25+ year NICEIC-approved team. 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[Home ](/) 2. Blog Resources # Practical electrical guides from working engineers Plain-English advice on the things that actually matter — what compliance is required, when to repair vs replace, and how to avoid the expensive mistakes we see every week. [Comparison ## EICR vs rewire vs consumer unit upgrade: which do you need? An EICR diagnoses, a consumer unit upgrade fixes protection, a rewire replaces cabling. Which one your property actually needs, and in what order. 6 August 2026Read article ](/blog/eicr-vs-rewire-vs-consumer-unit-upgrade)[Rewiring ## How long does a house rewire take? Stage-by-stage timings for first fix, second fix, testing and making good — plus what pushes a rewire to the longer end of the range. 6 August 2026Read article ](/blog/how-long-does-a-rewire-take)[Compliance ## Do I need an EICR to sell my house? Not legally — but the TA6 form and your buyer's solicitor will ask about electrical certificates. When it pays to get one before you list. 6 August 2026Read article ](/blog/do-i-need-an-eicr-to-sell-my-house)[Consumer Units ## What size consumer unit do I need? How to count circuits, allow for the main switch and surge protection, and leave spare ways for an EV charger or heat pump later. 6 August 2026Read article ](/blog/what-size-consumer-unit-do-i-need)[Consumer Units ## Fuse board vs consumer unit: what's the difference? Same job, different generations. How to identify which you have in 30 seconds, and when replacement is genuinely necessary. 6 August 2026Read article ](/blog/fuse-board-vs-consumer-unit)[Compliance ## How much does an EICR cost in London? (2026 guide) What landlords and homeowners actually pay for an Electrical Installation Condition Report — broken down by property size, location and remedial work. 30 April 2026Read article ](/blog/eicr-cost-london-2026)[Home Safety ## 10 signs your house needs rewiring Warm sockets, frequent trips, flickering lights — when these symptoms point to deeper wiring problems and when they don't. 30 April 2026Read article ](/blog/signs-you-need-to-rewire-your-house)[EV & Energy ## EV charger home installation: a South London guide Everything you need to know before booking an EV charger install — supply capacity, OZEV grants, smart tariffs and what installers should check. 30 April 2026Read article ](/blog/ev-charger-home-installation-south-london) ### 24/7 Electrical Ltd NICEIC-approved electricians. Available 24/7 for emergencies and planned work across London & South East. [0203 576 6961](tel:02035766961) [07557 781201](tel:07557781201) [info@24-7electrician.co.uk](mailto:info@24-7electrician.co.uk) Head Office 51 High Street, Edenbridge, Kent TN8 Croydon Office 104 Friars Wood, Croydon, CR0 9JP [](https://www.instagram.com/247electricalkent/)[](https://www.facebook.com/profile.php?id=100084202661265)[](https://www.youtube.com/channel/UCBm6o6WrQ68wI7KRlXyBzbA)[](https://www.tiktok.com/@247electricalltd) #### Services - [Emergency Repairs](/services/emergency-repairs) - [House Rewiring](/services/house-rewiring) - [EICR Testing](/services/eicr-testing) - [EV Chargers](/services/ev-charger-installation) - [Consumer Units](/services/consumer-units) - [Lighting](/services/lighting-installation) - [Fire Alarms](/services/fire-alarm-installation) - [Garden Lighting](/services/garden-lighting) - [Kitchen & Bathroom](/services/bathroom-kitchen-electrics) - [CCTV](/services/cctv-installation) - [Smart Home](/services/smart-home) - [Commercial](/services/commercial-electrical) - [PAT Testing](/services/pat-testing) - [Maintenance](/services/electrical-maintenance) - [Fault Finding](/services/fault-finding) - [Appliance Repair](/services/appliance-repair) #### Areas We Cover - [Croydon](/areas/croydon) - [Sutton](/areas/sutton) - [Mitcham](/areas/mitcham) - [Bromley](/areas/bromley) - [Beckenham](/areas/beckenham) - [Edenbridge](/areas/edenbridge) - [Orpington](/areas/orpington) - [Penge](/areas/penge) - [Sydenham](/areas/sydenham) - [Lewisham](/areas/lewisham) - [Dulwich](/areas/dulwich) - [Streatham](/areas/streatham) - [Tooting](/areas/tooting) - [Westerham](/areas/westerham) - [Oxted](/areas/oxted) - [Caterham](/areas/caterham) #### Company - [About Us](/about) - [Case Studies](/case-studies) - [Reviews](/reviews) - [Blog](/blog) - [Contact](/contact) - [Privacy Policy](/privacy) - [Terms & Conditions](/terms) - [Cookie Policy](/cookies) © 2026 24/7 Electrical Ltd. 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