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AVEVA™ Electrical

BS – Running Voltage Drop Calculation

  • Last UpdatedMar 14, 2022
  • 1 minute read

The BS standard specifies the equation for voltage drop calculation as follows:

V d = (L * Id * Vc) / 1000

Where:

V d = actual voltage drop, in volts

Vc = the millivolt drop per ampere-metre route length of circuit

L = route length of circuit, in metres

Id = the current to be carried by the cable, in amperes

Note:

  • For single phase (phase to neutral) loads Vc = Vc * 2/Ö3

  • For 2 phase (phase to phase) loads Vc = Vc * 2 / 3

  • Note this is for balanced loads, i.e. no current in neutral

  • In case of cables in parallel this is the design current divided by 2.

The result of this calculation can be found in Sizing Result Tab as shown below:

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