Choosing the correct cable size is one of the most important steps in any 12V, 24V or 60V electrical installation. Undersized cables cause excessive voltage drop, overheating, power loss and unreliable performance. Oversized cables increase cost and make installation more difficult.
To make this process easy, MKGT provides two powerful online calculators and two downloadable technical guides covering everything from low-voltage 2-core cables to heavy-duty battery cables up to 95 mm².
This article explains when to use each tool and provides direct links to the calculators and PDF guides.
🔌 1. MKGT 2-Core Cable Size Calculator (0.5–4.5 mm²)
Ideal for:
- 12V / 24V / 60V lights
- sensors & electronics
- pumps, small motors
- marine & campervan auxiliary circuits
- general low-voltage automotive wiring
The calculator uses system voltage, current load, cable length and acceptable voltage drop to recommend the correct MKGT 2-core flat cable.
👉 Use the calculator here:
https://mkgt.co.uk/blogs/news/2-core-automotive-cable-size-guide-how-to-choose-the-correct-cable-for-12v-24v-and-60v-systems
🔋 2. MKGT Battery Cable Size Calculator (10–95 mm²)
Designed for high-current systems including:
- starter motors
- inverters (500–3000W+)winches & heavy-duty equipment
- power distribution systems
- marine and off-grid battery banks
This calculator determines the minimum required cross-section based on voltage drop and returns the recommended MKGT cable size.
👉 Use the calculator here:
https://mkgt.co.uk/blogs/news/battery-cable-size-guide-how-to-choose-the-correct-cable-for-your-vehicle-or-installation
📘 Download MKGT Technical Guides (Free PDFs)
For customers who need a deeper technical explanation, MKGT provides two detailed engineering guides — fully branded, with diagrams, charts and professional recommendations.
📄 MKGT 2-Core Cable Technical Guide (PDF)
Covers: voltage drop, 12V/24V/60V behaviour, circuit length, diagrams, recommended applications.
Perfect for automotive electricians, installers and DIY users.
👉 Download PDF:
https://cdn.shopify.com/s/files/1/0663/5103/8714/files/MKGT_2core_Technical_Guide_BRANDED.pdf?v=1764526996
📄 MKGT Battery Cable Technical Guide (PDF)
Includes: current ratings for 10–95 mm², inverter & starter loads, voltage-drop limits, diagrams and engineering best-practice.
👉 Download PDF:
https://cdn.shopify.com/s/files/1/0663/5103/8714/files/MKGT_Battery_Cable_Technical_Guide.pdf?v=1764527373
⚡ Why These Tools Matter
Correct cable sizing ensures:
- maximum performance
- reduced voltage drop
- safe operating temperatures
- longer component lifespan
- compliance with industry standards
Whether you are wiring a car, campervan, marine vessel, workshop installation or off-grid power system — using the right cable size is essential.
MKGT provides both calculators and technical guides completely free to support customers, installers and professionals across the UK.