This tab is used to set various parameters which are shown on Distribution Boards tab.


  • Max Zs at 80%: See MaxZs at 80%
  • Overwrite manufacturer MaxZs with BS7671 tables: This option will overwrite manufacturers' MaxZs data for a device with BS7671 tabulated values.
  • Default insulation resistance test result/voltage: User may enter desired values to these fields which will be set as default by UK Forms. UK Forms will then fill in those fields automatically on every certificate created.



  • Record RCD's 5xIΔn and 1xIΔn in Distribution board schedules: This option will add a new column to accommodate 5xIΔn value.


  • Exclude Plan Prefix from Circuit Design: This will remove the prefixes used for circuits from the Circuit Description column.


  • Use 'TP' as the three-phase abbreviation in the circuit number column: Three-phase circuits will be identified by "TP" instead of "L1,L2,L3"


  • Itemised cpc size (e.g. SWA S:1.5==>The cpc is the SWA + 1.5mm2 of a separate conductor): If this option is unticked, UK Forms will display the total copper equivalent of the cpc. If ticked, the cpc field will be changed to itemised mode and cross sections will be displayed (except armour option) after a code which indicates the cpc type. This field may contain multiple codes letters to indicate more than one option are used for cpc. The code letters are as follows:
    • SWA: Armour
    • S: Separate conductor
    • C: Core of the cable