Description
2.5mm Flex Cable Per Metre: Higher Capacity for Demanding Applications
A 2-core 2.5mm flex cable is the next step up from standard 1.5mm cabling, offering increased current-carrying capacity for more demanding electrical loads. The “2.5mm” refers to the cross-sectional area of each conductor, which determines its ability to carry current safely .
The “2 core” means it contains two insulated conductors, typically used for live (brown) and neutral (blue) connections for double-insulated appliances that do not require an earth. This “per metre” service allows you to purchase custom lengths, eliminating waste and ensuring you have precisely the right amount for your specific task.
2.5mm Flex Cable Per Metre: Key Specifications
| Specification | Details |
|---|---|
| Cable Type | Ordinary Duty Flexible Cord |
| Harmonised Code | 3182Y or H05VV-F |
| Conductor Size | 2.5 mm² |
| Number of Cores | 2 |
| Conductor Material | Plain Annealed Flexible Copper |
| Conductor Strands | Typically 50/0.25mm |
| Insulation Material | PVC |
| Sheath Material | PVC |
| Sheath Colour | White or Black |
| Current Rating | 20 Amps |
| Voltage Rating | 300/500V |
| Maximum Power | Approximately 4.6kW at 230V |
| Overall Diameter | Approximately 8-9mm |
| Operating Temperature | -15°C to +70°C |
| Core Colours | Brown (Live), Blue (Neutral) |
| Standards | BS 6500, Harmonised HD 21 |
| Selling Unit | Per Metre (cut to length) |
2.5mm Flex Cable Per Metre: Construction and Materials
This cable is constructed from high-quality materials to ensure reliable performance and safety under higher electrical loads.
Conductors: The conductors are made from plain annealed flexible copper, consisting of multiple fine strands—typically 50 strands of 0.25mm diameter wire . This fine stranding gives the cable its excellent flexibility, making it easier to route and connect in tight spaces than solid-core alternatives.
Insulation: Each copper conductor is individually insulated with colour-coded PVC: brown for live and blue for neutral. This provides robust electrical insulation and prevents short circuits.
Outer Sheath: The two insulated cores are encased in an outer PVC sheath, providing additional mechanical and environmental protection. The sheath shields the internal conductors from abrasion, moisture, and general wear.
2.5mm Flex Cable Per Metre: Why Choose 2.5mm?
The larger 2.5mm² conductor size offers significant advantages over smaller 1.5mm² cable:
Higher Current Rating: Rated at 20 Amps compared to 16 Amps for 1.5mm cable, allowing connection of more powerful appliances .
Reduced Voltage Drop: For longer cable runs, the lower resistance of 2.5mm cable minimises voltage drop, ensuring appliances receive adequate power.
Future-Proofing: Installing 2.5mm cable provides headroom for future equipment upgrades.
Mechanical Robustness: The thicker conductors and cable construction are more resistant to damage.
2.5mm Flex Cable Per Metre: Applications
This higher-capacity cable is suitable for a wide range of demanding applications:
Heavy Domestic Appliances: Connecting washing machines, tumble dryers, dishwashers, and large fridge-freezers that draw higher currents.
Power Tools: Ideal for heavy-duty power tools in workshops and on construction sites where high current draw is common.
Extension Leads: Perfect for manufacturing custom-length heavy-duty extension leads for garage, workshop, or outdoor use, capable of powering multiple tools.
Industrial Equipment: Suitable for light industrial machinery and equipment within factories and workshops .
Fixed Installations: Can be used for fixed wiring within control panels and machinery where flexibility is required.
Commercial Kitchens: Connecting commercial catering equipment that demands higher power ratings.
2.5mm Flex Cable Per Metre: Why Choose Per Metre?
Purchasing cable by the metre offers several practical advantages:
Cost-Effective: Pay only for what you need. No waste and no unused cable left coiled in your workshop.
Project-Specific: Perfect for replacing damaged flex on a specific appliance or creating a single custom-length extension lead.
No Storage Issues: Avoid storing bulky reels of expensive cable. Order exactly what your current project requires.
Flexible Quantities: Need 3 metres for a washing machine replacement and 15 metres for a workshop extension? Order precisely.
2.5mm Flex Cable Per Metre: Important Notes
Continuous Length: When you order multiple metres, you will receive one continuous length of cable, not multiple separate pieces. For example, ordering 5 metres supplies a single 5-metre length.
Cut to Order: Each length is cut from a full reel specifically for your order. This may add a small processing time to dispatch.
Colour Availability: Please check the product variant for sheath colour options. White is commonly used for household appliances, while black is often preferred for workshops and general-purpose wiring.
Returns: Due to hygiene and safety reasons, cut cable cannot be returned unless faulty. Please measure your requirements carefully before ordering.
2.5mm Flex Cable Per Metre: Electrical Ratings
The 2.5mm² conductor size gives this cable a standard current rating of 20 Amps when installed in free air . This makes it suitable for appliances up to approximately 4.6kW on a 230V supply.
Note that the current rating can be affected by installation conditions. If the cable is bunched with others, run through thermal insulation, coiled tightly, or exposed to high ambient temperatures, its current-carrying capacity may be reduced. Always ensure the cable is appropriately rated for your specific application.
2.5mm Flex Cable Per Metre: Quality and Compliance
This cable is manufactured to meet rigorous international standards:
BS 6500: British Standard for flexible cords
Harmonised Standard HD 21: European standard for PVC-insulated cables
CE Marking: Indicates compliance with relevant European directives
RoHS Compliance: Free from hazardous substances
2.5mm Flex Cable Per Metre: Measuring Your Needs
To determine how much cable you require:
For replacing an existing flex, measure the old cable from end to end, including the length inside the appliance and plug.
For new installations, measure the planned route carefully and add extra for connections at each end—typically 100-150mm per end.
Always allow a little extra for routing around corners and for service loops, making future maintenance easier.
When installed correctly and used within its ratings, 2.5mm 2-core flex cable provides a safe, reliable, and long-lasting connection for a wide range of higher-power household, workshop, and light industrial applications. Order the exact length you need today.




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