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CableCalc BS7671 - Level 1

Disconnection time curve

For the electrician or engineer who requires quick calculations to the requirements of BS7671. Create detailed design schedules which can be easily printed on to paper. CableCalc Level 1 will calculate single and three phase calculations for radial and ring main circuits with the results output to a detailed calculation printout. Click the image below for a typical printout.

CableCalc Level 1 includes a full database of copper cables and generic protective devices and allows you to complete all applicable information sorted into 5 sections:

  • Supply Details - Source information, circuit type, load and distance
  • Cable Selection - Cable type, size and installation method
  • Correction Factors - Grouping factors, temperature correction, thermal insulation and any cable tray or ladder configuration
  • Protective Device - Type and rating of the device protecting the circuit
  • CPC - Details of any cable sheath or armouring, internal cores and any separate cables or conduit/trunking

Cable Selection

Cable Selection, click for larger image



Cable types included (but not limited to):

  • 70C PVC Armoured & Non Armoured multicore & singles, Twin & earth, 6191x Singles, CNE & Split concentric, M&Q, YY
  • 90C LSF Armoured singles & multicore, 6491b Singles, Twin & earth, Flat 3 core & earth
  • 90C XLPE Armoured & Non Armoured singles & Multicore, 6491b & 6181xv singles
  • Rubber Singles & Multicore, FP100, FP200, FP400, Solar Cable, Coil End Leads
  • MICC PVC Sheath/Bare, Heavy & Light Duty
  • CY, SY, YY & Armaflex 70C PVC Flexible cable, 105C Tri-Rated singles
  • 60, 90 & 150C Rubber insulated flexible cable
  • PVC, Rubber & Glass fibre flexible cords



Protective Devices

Protective device Selection, click for larger image

Generic Protective Devices included:

  • Minature Circuit Breakers (MCB) to BS EN 60898 types B, C & D to 125A, Older BS 3871 types 1, 2, 3, & 4 to 125A
  • Molder Case Circuit Breakers (MCCB) to BS EN 60947, 20A to 1600A, adjustable for Magnetic (multiplier) & Thermal settings
  • Air Circuit Breakers (ACB) to BS EN 60947, 400A to 6300A, adjustable for Magnetic (multiplier) & Thermal settings
  • Residual Current Devices (RCD) to BS EN 61008, 10mA, 30mA, 100mA, 300mA, 6A to 100A
  • Residual Current Circuit Breakers (RCBO) to BS EN 61009, 10mA, 30mA, 100mA, 300mA, 6A to 100A
  • BS 88 HRC cartridge fuses, 2A to 800A
  • BS 1361 HRC cartridge fuses, 5A to 100A
  • BS 1362 plug fuses, 1A to 13A
  • BS 3036 rewireable fuses, 5a to 100A



Click image for a sample printout

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CableCalc BS7671 - Level 1 - 195.00

CableCalc is currently available for Windows PC's only. It will not work on Apple Mac computers.