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Essential Electrical Components: A Checklist for Every Project
Published: 20 Apr 2026 ・ Read time: 5 Mins
Having the right components on hand can make the difference between a smooth install and a frustrating extra trip to the trade counter, whether you're an electrician, a heating engineer, or a DIYer. At City Plumbing, we know that plumbing and electrical work often go hand in hand. That’s why we’ve introduced Elecstore, your dedicated electrical hub within our branches and online.
We're committed to providing highly competitive prices across our entire range, ensuring you get professional-grade quality without the premium price tag. From everyday consumables to specialised distribution gear, we’ve made it easier (and more affordable) than ever to source everything under one roof.
To keep you prepared and on budget, here’s a quick checklist of just some of the essential electrical items you’ll find in store for your projects, and all at continually low prices.
Must-Have Electrical Components for Domestic Jobs
Everyone knows the visible part of any electrical job, like switches and sockets, is only part of the story. To ensure a lasting and professional finish, it’s also important to have a solid foundation of wiring accessories.
- Socket Outlets & Faceplates: Modernise your project by opting for sockets with integrated USB-A or USB-C ports. They are a huge selling point for homeowners.
- Back Boxes: Ensure you have a mix of metal "knockout" boxes for masonry walls and yellow "dry lining" boxes for stud partitions.
- Lever Connectors (e.g., Wago): Move away from old-fashioned terminal blocks. Lever connectors provide a faster, more secure, and maintenance-free way to join cables.
- Junction Boxes: Essential for safely extending circuits or adding new lighting points.
- Mounting Blocks & Pattress Boxes: For surface-mounted installations where chasing into the wall isn't an option.
Essential Circuit Protection Items
Safety is the non-negotiable heart of any electrical system. With the introduction of BS 7671 Amendment 2 (18th Edition), requirements for circuit protection have become stricter to ensure maximum occupant safety.
- Consumer Units: Modern metal-clad units are now the standard for fire safety in domestic dwellings.
- RCDs (Residual Current Devices): These are life-savers, designed to disconnect the power instantly if they detect a leak to earth.
- MCBs (Miniature Circuit Breakers): These protect individual circuits from overload and short-circuit conditions.
- RCBOs: A versatile choice for any user. These devices combine the functions of an RCD and an MCB into a single device. Using RCBOs ensures that a fault on one circuit (such as a damp outdoor light) does not cause power to be disconnected from the rest of the house.
- Surge Protection Devices (SPD): Increasingly important for protecting sensitive modern electronics and smart home tech from voltage spikes.
The Tradeperson’s Checklist for Electrical Wiring
A clean, compliant installation relies on the quality of your cables and how you manage them. Check your supply of these essential items before heading to your next project:
Cable Essentials
- Twin & Earth (T&E): The bread and butter of domestic wiring. Ensure you have 1.5 mm² for lighting and 2.5 mm² for power circuits.
- 3-Core and Earth: Necessary for two-way lighting circuits or extractor fan timers.
- Heat-Resistant Flex: A must-have for connecting immersion heaters or boilers where standard PVC cable might degrade due to temperature.
Cable Management
- PVC Conduit & Trunking: Keeps surface-mounted wiring neat and protected.
- Capping: Use metal or plastic capping to protect cables buried in plaster from accidental nail or screw punctures.
- Cable Clips: Plan ahead — keep a variety of sizes (especially 1.0mm to 2.5mm) in your kit.
Shop our Cable & Cable Management range at City Plumbing
Consumables & Finishing
- Insulating Tape: For phase identification and temporary bundling.
- Grommets: Always use rubber grommets when feeding cable through the sharp metal entry points of a back box.
- Earth Sleeving: Ensure all bare-earth wires are properly identified with green and yellow sleeving to comply with UK wiring regulations.
Shop Site Temp Consumables at City Plumbing
Don’t Let a Missing Component Stall Your Finish
In the trade, time is money. It can be frustrating to have to pack up early because you're missing one RCBO or a roll of earth sleeving. By stocking up at Elecstore, you can get your electrical essentials and plumbing supplies in a single trip, saving you time and keeping your project on schedule.
Whether you're upgrading a consumer unit or simply replacing faceplates, we provide professional-grade gear at prices designed to help you stay on budget.
Shop the Full Electrical Range Online from our dedicated Elecstore, or visit your local City Plumbing Branch.
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