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Cable Calculation

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Cable Calculation

Calculated / Selected Characteristics

IbAmps
InAmps
Voltsv
The selected overcurrent device rating is larger or than or equal to your design current.
The selected overcurrent device rating must be greater than or equal to the design current.

Applied Standard Correction Factors

FactorCa
Table F1 of the on site guide. Table 4B1, 4B2 BS7671
FactorCg
Table F3 of the on site guide. Table 4C1 BS7671
FactorCi
Table F2 of the on site guide. Appendix 4 section 2.6 BS7671
FactorCf
Where the protective device is a semi-enclosed fuse to BS3036 Cf = 0.725; and for all other devices Cf = 1. (433.1.202)

Applied Additional Correction Factors

Cable Information

ItAmps
Amps
mm2
mm2
The selected cable rating is larger or than or equal to your tabulated current carrying capacity.
The selected cable rating must be larger or equal to the tabulated current carrying capacity.

Volt Drop

Lengthm
ResistancemV/A/m
Voltsv
Percentage%
Voltsv
The volt drop percentage is within the limits of BS7671 for power circuits.
The volt drop percentage is outside the limits of BS7671 for power circuits.
The volt drop percentage is within the limits of BS7671 for lighting circuits.
The volt drop percentage is outside the limits of BS7671 for lighting circuits.

Earth Fault Loop Impedance Check

ResistanceΩ
MF
Lengthm
R1 + R2mΩ/m
s
ZsΩ
ZsΩ

Prospective Fault Current

Voltsv
Cmin
CurrentIpf
s
Minimum trip time based on prospective fault current. Using time / current characteristics charts.

Minimum CPC CSA Adiabatic Check

Factor Valuek
min. CSAmm2
Waiting to check the minimum CSA of the CPC from the adiabatic check against your chosen CPC CSA...
Your selected CPC CSA is suitable for this circuit. It is greater than CSA required from result of the adiabatic check.

Result

The selected CPC CSA is NOT suitable for this circuit. It is less than CSA required from result of the adiabatic check.

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