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Tell us about your practice and your distribution network design workflow. We'll be in touch to arrange a personal walkthrough of CableSpec Pro, answer any questions about the BS7671 methodology and Pro features, and discuss licensing options.

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What happens next

  • A personal response within one business day
  • We'll walk through the full CableSpec Pro workflow with you
  • Answer any BS7671 methodology and Pro feature questions you have
  • Discuss the right licence option for your practice
  • Your account is activated and you can start calculating immediately
  • No hard sell - just a straightforward technical conversation

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If you already have a Construct Software account, once purchased you can access CableSpec Pro directly from your Start dashboard - no new account or setup needed.

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What CableSpec Pro calculates

  • CCC: Ib ≤ In, Ib ≤ Iz (Reg 433.1.1)
  • Overload: In ≤ Iz × Cf × Cc (Regs 433.1.201–204)
  • VD: Ir·cosφ + Ix·sinφ reactive formula (App 4 §6.4)
  • Zs ≤ Zs_max: correct time per earthing & type (Reg 411.3.2)
  • CPC: S ≥ √(I²t)/k or Table 54.7 (Regs 543.1.3–4)
  • PFC vs breaking capacity (advisory)
  • ΣVD: accumulated VD from origin (App 4 §6.4)
  • Selectivity: I²t & threshold discrimination (Reg 536.4)

REST API available

CableSpec Pro includes a full REST API for Revit plugins, Power Automate flows and custom integrations. Ask us about API access during your demo.