Engineering Tools
Free calculators to help you spec your project. Cable sizing, voltage drop, and power factor correction — the numbers you need before you pick up the phone.
Cable Sizing Calculator
Estimate the minimum cable cross-section for your circuit based on BS 7671 current ratings (simplified).
Need help with the spec?
These calculators give you a starting point. For a proper design — cable schedules, protection coordination, the full spec — get in touch and we'll work it out together.