Global

Methods

arrayConcat(ar1,)

Concatenates up to 9 arrays (assuming the number of columns are the same in each array.
Parameters:
Name Type Description
ar1, array ar2 ... ar 9 arrays to be concatenated.
Source:
Returns:
joined (concatenated array)

arrayJoin(ar1, ar2, col1, col2)

Joins two arrays (of different data) on column values in array 2, equalling column values in array 1.
Parameters:
Name Type Description
ar1 array ar1 first array to be joined.
ar2 array ar2 second array to be joined.
col1 col1 col1 joining column in array 1
col2 col2 col2 joing column in array 2
Source:
Returns:
joined arrays

bs7671AirMultiCoreCapacity(cableDetailId, Ib, pf, In, phase, secondaryMethodID, inParallel, noCircuits, circuitSpacing, airTemperature, header)

Returns the sustained capacity (A) of a multi core cable installed in air in accordance with BS 7671.
Parameters:
Name Type Description
cableDetailId number cableDetailId for which to look up the CSA.
Ib number Ib design current of the circuit, A.
pf number pf power factor (= 1 for d.c. circuits).
In number In rated current setting of a protective device, A.
phase number phase configuration:see =phases().
secondaryMethodID number secondaryMethodID secondary installation method ID.
inParallel number inParallel number of cables in parallel supplying a single circuit.
noCircuits number noCircuits number of independent cable circuits running together.
circuitSpacing number circuitSpacing spacing between independent cable circuits (see noCircuits), m.
airTemperature number airTemperature ambient temperature of the air, °C.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
CSA (mm2), Capacity (A), CableDetailID

bs7671AirMultiCoreCSA(cableId, Ib, pf, In, phase, secondaryMethodID, inParallel, noCircuits, circuitSpacing, airTemperature, header)

Returns the recommend CSA (mm2) of a multi core cable installed in air in accordance with BS 7671.
Parameters:
Name Type Description
cableId number cableId for which to look up the CSA.
Ib number Ib design current of the circuit, A.
pf number pf power factor (= 1 for d.c. circuits).
In number In rated current setting of a protective device, A.
phase number phase configuration:see =phases().
secondaryMethodID number secondaryMethodID secondary installation method ID.
inParallel number inParallel number of cables in parallel supplying a single circuit.
noCircuits number noCircuits number of independent cable circuits running together.
circuitSpacing number circuitSpacing spacing between independent cable circuits (see noCircuits), m.
airTemperature number airTemperature ambient temperature of the air, °C.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
CSA (mm2), Capacity (A), CableDetailID

bs7671AirSingleCoreCapacity(cableDetailId, Ib, pf, In, phase, configurationID, secondaryMethodID, inParallel, noCircuits, circuitSpacing, airTemperature)

Returns the sustained current capacity of a single core cable installed in air in accordance with BS 7671.
Parameters:
Name Type Description
cableDetailId number cableDetailId for which to look up the sustained capacity.
Ib number Ib design current of the circuit, A.
pf number pf power factor (= 1 for d.c. circuits).
In number In rated current setting of a protective device, A.
phase number phase configuration:see =phases().
configurationID number configurationID: see configurations().
secondaryMethodID number secondaryMethodID secondary installation method ID.
inParallel number inParallel number of cables in parallel supplying a single circuit.
noCircuits number noCircuits number of independent cable circuits running together.
circuitSpacing number circuitSpacing spacing between independent cable circuits (see noCircuits), m.
airTemperature number airTemperature ambient temperature of the air, °C.
Source:
Returns:
CSA (mm2), Capacity, CableDetailID

bs7671AirSingleCoreCSA(cableId, Ib, pf, In, phase, configurationID, secondaryMethodID, inParallel, noCircuits, circuitSpacing, airTemperature, header)

Returns the recommend CSA (mm2) of a single core cable installed in air in accordance with BS 7671.
Parameters:
Name Type Description
cableId number cableId for which to look up the CSA.
Ib number Ib design current of the circuit, A.
pf number pf power factor (= 1 for d.c. circuits).
In number In rated current setting of a protective device, A.
phase number phase configuration:see =phases().
configurationID number configurationID: see configurations().
secondaryMethodID number secondaryMethodID secondary installation method ID.
inParallel number inParallel number of cables in parallel supplying a single circuit.
noCircuits number noCircuits number of independent cable circuits running together.
circuitSpacing number circuitSpacing spacing between independent cable circuits (see noCircuits), m.
airTemperature number airTemperature ambient temperature of the air, °C.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
CSA (mm2), Capacity (A), CableDetailID

bs7671BuriedMultiCoreCapacity(cableDetailId, Ib, pf, In, phase, secondaryMethodID, inParallel, noCircuits, circuitSpacing, groundTemperature, depth, soilThermalResistivity, header)

Returns the capacity (A) of a multi core cable installed in ground in accordance with BS 7671.
Parameters:
Name Type Description
cableDetailId number cableDetailId for which to look up the CSA.
Ib number Ib design current of the circuit, A.
pf number pf power factor (= 1 for d.c. circuits).
In number In rated current setting of a protective device, A.
phase number phase configuration:see =phases().
secondaryMethodID number secondaryMethodID secondary installation method ID.
inParallel number inParallel number of cables in parallel supplying a single circuit.
noCircuits number noCircuits number of independent cable circuits running together.
circuitSpacing number circuitSpacing spacing between independent cable circuits (see noCircuits), m.
groundTemperature number groundTemperature ambient temperature of the soil, °C.
depth number depth buried cable depth, M
soilThermalResistivity number soilThermalResistivity soil thermal resistivity of ground (cable are buried in), K.m/W
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
CSA (mm2), Capacity (A), CableDetailID

bs7671BuriedMultiCoreCSA(cableId, Ib, pf, In, phase, secondaryMethodID, inParallel, noCircuits, circuitSpacing, groundTemperature, depth, soilThermalResistivity, header)

Returns the recommend CSA (mm2) of a multi core cable installed in ground in accordance with BS 7671.
Parameters:
Name Type Description
cableId number cableId for which to look up the CSA.
Ib number Ib design current of the circuit, A.
pf number pf power factor (= 1 for d.c. circuits).
In number In rated current setting of a protective device, A.
phase number phase configuration:see =phases().
secondaryMethodID number secondaryMethodID secondary installation method ID.
inParallel number inParallel number of cables in parallel supplying a single circuit.
noCircuits number noCircuits number of independent cable circuits running together.
circuitSpacing number circuitSpacing spacing between independent cable circuits (see noCircuits), m.
groundTemperature number groundTemperature ambient temperature of the soil, °C.
depth number depth buried cable depth, M
soilThermalResistivity number soilThermalResistivity soil thermal resistivity of ground (cable are buried in), K.m/W
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
CSA (mm2), Capacity (A), CableDetailID

bs7671PrimaryMethods(cableId, phase, header)

Returns a list of BS 7671 primary installation methods for a given a cable id and phase. ID, Description, ReferenceMethod, Buried.
Parameters:
Name Type Description
cableId number cableId for which to look up the installation methods.
phase number Phase configuration:see =phases().
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, Description, ReferenceMethod, Buried

bs7671SecondaryMethods(cableId, primaryID, phase, header)

Returns a list of BS 7671 secondary installation methods for a given a cable id, primaryID and phase. ID, Description, ReferenceMethod, Buried, ScConfig (allowable single core configurations).
Parameters:
Name Type Description
cableId number cableId for which to look up the installation methods.
primaryID number primaryID for which to look up the installation methods.
phase number Phase configuration:see =phases().
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID,primaryID, Description, ScConfig

cableConductorTemperature(Ib, Iz, ambientTemperature, Ti)

Estimate the operating temperature of a conductor based on it's calculated sustained rating, Iz (at Ti), cable current Ib, ambient temperature Ta, and maximum insulation temperature Ti.
Parameters:
Name Type Description
Ib number design current of a circuit, A.
Iz number sustained capacity of cable (at maximum insulation temperature), A.
ambientTemperature number ambient temperature of the surrounding, °C.
Ti number insulation maximum operating temperature, °C.
Source:
Returns:
Operating temperature.

cableConductorTemperature_LibraryID(Ib, Iz, ambientTemperature, cableLibraryID)

Estimate the operating temperature of a conductor based on it's calculated sustained rating, Iz (at Ti), cable current Ib, ambient temperature Ta, and cable library ID.
Parameters:
Name Type Description
Ib number design current of a circuit, A.
Iz number sustained capacity of cable (at maximum insulation temperature), A.
ambientTemperature number ambient temperature of the surrounding, °C.
cableLibraryID number cable library ID.
Source:
Returns:
Operating temperature.

cableDetails(cableId, header)

Returns a list of cable details for a given cable id and phase. ID, CSA, OverallDiameter(mm), ArmmourCSA.
Parameters:
Name Type Description
cableId number cableId database id of the cable to get details for.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, CableID, CSA, OverallDiameter(mm), ArmmourCSA.

cableDetailsID(cableDetailId, header)

Returns cable details given its id. ID, CSA, OverallDiameter(mm), ArmmourCSA.
Parameters:
Name Type Description
cableDetailId number cableDetailId database id of the cable to get details for.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, CableID, CSA, OverallDiameter(mm), ArmmourCSA.

cables(cableSourceId, phase, header)

Returns a list of cables for a given source id and phase. ID, Description, Cores, ConductorMaterial ConductorMaterialId, InsulationMaterial, InsulationMaterialId, ArmourMaterial, ArmourMaterialID.
Parameters:
Name Type Description
cableSourceId number cableSourceId for which to look up cables for.
phase number Phase configuration:see =phases().
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, CableSourceID, Description, Cores, ConductorMaterial, ConductorMaterialId, InsulationMaterial, InsulationMaterialId, ArmourMaterial, ArmourMaterialID

cablesID(cableId, header)

Returns a cable for a given its id. ID, Description, Cores, ConductorMaterial, ConductorMaterialId, InsulationMaterial, InsulationMaterialId, ArmourMaterial, ArmourMaterialID.
Parameters:
Name Type Description
cableId number cableId database id of the cable.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, CableSourceID, Description, Cores, ConductorMaterial, ConductorMaterialId, InsulationMaterial, InsulationMaterialId, ArmourMaterial, ArmourMaterialID

cableSources(header)

Returns a list of all cable sources. ID, Manufacturer, Description, U3, U0, Udc.
Parameters:
Name Type Description
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, Manufacturer, Description, U3, U0, Udc

cableSourcesID(id, header)

Returns a cable sources for a given id. ID, Manufacturer, Description, U3, U0, Udc.
Parameters:
Name Type Description
id number database id of the cables, V
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, Manufacturer, Description, U3, U0, Udc

cableSourcesVoltagePhase(voltage, phase, header)

Returns a list of all cable sources suitable for use with given voltage and phase. ID, Manufacturer, Description, U3, U0, Udc.
Parameters:
Name Type Description
voltage number System operating voltage, V
phase number Phase configuration: 0 - d.c. 1 - single phase a.c. 3 - three phase a.c. 4 - three pahse + neutral a.c.
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, Manufacturer, Description, U3, U0, Udc

complex(Re, Im)

Generate a complex number, give the real and imaginary parts.
Parameters:
Name Type Description
Re number real part of a complex
Im number imaginary part of a complex number,
Source:
Returns:
complex number

complexAdd(first, second)

Add two complex numbers (a+b).
Parameters:
Name Type Description
first complex number
second complex number
Source:
Returns:
complex number (the sum)

complexConjugate(complex)

Find the conjugate of a complex number.
Parameters:
Name Type Description
complex complex number
Source:
Returns:
complex number (the conjugate)

complexCurrentPF(current, powerFactor)

Get the complex representation of current, from the magnitude and power factor. For d.c. power factor = 1. +ve power factor indicates lagging, -ve leading.
Parameters:
Name Type Description
current number magnitude of the current
powerFactor number the power factor of the current (set = 1 for d.c.).
Source:
Returns:
complex number representing the current

complexDivide(first, second)

Divide two complex numbers (a/b).
Parameters:
Name Type Description
first complex number
second complex number
Source:
Returns:
complex number (the division)

complexIm(complex)

Get the imaginary part of a complex number, give the full number (both real and imaginary parts).
Parameters:
Name Type Description
complex complex number
Source:
Returns:
imaginary part

complexMag(complex)

Get the magnitude part of a complex number, give the full number (both real and imaginary parts).
Parameters:
Name Type Description
complex complex number
Source:
Returns:
magnitude of the number

complexMagPhase(magnitude, phase)

Generate a complex number, give the magnitude and phase angle, radians.
Parameters:
Name Type Description
magnitude number magnitude of the complex number
phase number phase angle of the complex number, radians
Source:
Returns:
complex number

complexMagPhaseDeg(magnitude, phase)

Generate a complex number, give the magnitude and phase angle, degrees.
Parameters:
Name Type Description
magnitude number magnitude of the complex number
phase number phase angle of the complex number, degrees
Source:
Returns:
complex number

complexMultiply(first, second)

Multiple two complex numbers (a*b).
Parameters:
Name Type Description
first complex number
second complex number
Source:
Returns:
complex number (the product)

complexPF(complex)

Get the power factor (cos(phase)) part of a complex number, give the full number (both real and imaginary parts). Normally used with electrical current.
Parameters:
Name Type Description
complex complex number
Source:
Returns:
power factor

complexPhase(complex)

Get the phase (radians) part of a complex number, give the full number (both real and imaginary parts).
Parameters:
Name Type Description
complex complex number
Source:
Returns:
phase of the number, radians

complexPhaseDeg(complex)

Get the phase (degrees) part of a complex number, give the full number (both real and imaginary parts).
Parameters:
Name Type Description
complex complex number
Source:
Returns:
phase of the number, degrees

complexRe(complex)

Get the real part of a complex number, give the full number (both real and imaginary parts).
Parameters:
Name Type Description
complex complex number
Source:
Returns:
real part

complexReciprocal(complex)

Find the reciprocal of a complex number.
Parameters:
Name Type Description
complex complex number
Source:
Returns:
complex number (the reciprocal)

complexReIm(Re, Im)

Generate a complex number, give the real and imaginary parts.
Parameters:
Name Type Description
Re number real part of a complex
Im number imaginary part of a complex number,
Source:
Returns:
complex number

complexRound(complex, dp)

Round a complex number to a given number of decimal places.
Parameters:
Name Type Description
complex complex number
dp number number of decimal places to round to
Source:
Returns:
complex number

complexSubtract(first, second)

Subtract one complex number from another (a-b).
Parameters:
Name Type Description
first complex number
second complex number
Source:
Returns:
complex number (the difference)

configurations(header)

Gets a list of configuration ID for various single core cable installations. ConfigurationID and description.
Parameters:
Name Type Description
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID and description.

materialConductorResistivity(input)

Electrical resistivity of a conductor, Ohm.m
Parameters:
Name Type Description
input number The conductor material ID
Source:
Returns:
Conductor resistivity, Ohm.m

materialConductors(header)

Returns a list conductor materials which can be used in Electrical Functions. ID, Symbol and Description.
Parameters:
Name Type Description
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
ID, Symbol and Description

materialConductorTemperatureCoefficient(input)

Temperature coefficient of a conductor, 1/K.
Parameters:
Name Type Description
input number The conductor material ID.
Source:
Returns:
Temperature coefficient of resistivity, 1/K.

materialConductorVolumetricHeatCapacity(input)

Volumetric heat capacity of a conductor, J.(1/K).(1/m3)
Parameters:
Name Type Description
input number The conductor material ID.
Source:
Returns:
Volumetric heat capacity of resistivity, J.(1/K).(1/m3)

phases(header)

Gets a list of phase IDs and associated description. PhaseID is used in many calls to differentiate between systems (i.e. single phase or three phase). Gives PhaseID, Description
Parameters:
Name Type Description
header boolean header optional parameter, will display header row if set to true
Source:
Returns:
PhaseID, Description

powerAC(resistance, reactance, current, powerFactor)

AC power across an impedance due to current flowing, W.
Parameters:
Name Type Description
resistance number resistance of the circuit in Ohm.
reactance number reactance of the circuit in Ohm.
current number the current flowing in the circuit, A.
powerFactor number power factor of the current (set =1 for d.c.).
Source:
Returns:
Power, W.

powerACVA(resistance, reactance, current, powerFactor)

AC VA (volt-amps) across an impedance due to current flowing, W.
Parameters:
Name Type Description
resistance number resistance of the circuit in Ohm.
reactance number reactance of the circuit in Ohm.
current number the current flowing in the circuit, A.
powerFactor number power factor of the current (set =1 for d.c.).
Source:
Returns:
Power, W.

powerACVAr(resistance, reactance, current, powerFactor)

AC reactive power across an impedance due to current flowing, W.
Parameters:
Name Type Description
resistance number resistance of the circuit in Ohm.
reactance number reactance of the circuit in Ohm.
current number the current flowing in the circuit, A.
powerFactor number power factor of the current (set =1 for d.c.).
Source:
Returns:
Power, W.

powerCmplx(impedance, current)

Complex power across an impedance due to current flowing, W.
Parameters:
Name Type Description
impedance complex impedance of the circuit in Ohm.
current complex the current flowing in the circuit, A.
Source:
Returns:
Power, W.

powerComplex(voltage, current, phase)

Complex power give by VxI* (I* is the conjugate of I), W. Additionally, power is calculated depending on phases (d.c., 1-ph or 3-ph)
Parameters:
Name Type Description
voltage complex voltage of the circuit, cartesian coordinate, V.
current complex current of the circuit, cartesian coordinates, A.
phase number number of phases to consider, see =phases().
Source:
Returns:
Power, complex form (W + jVAr).

powerDC(resistance, current)

DC power across a resistance due to current flowing, W.
Parameters:
Name Type Description
resistance number resistance of the circuit in Ohm.
current number the current flowing in the circuit, A.
Source:
Returns:
Power, W.

resistanceDC20(resistivity, CSA, length)

d.c. resistance of a conductor at 20degC, Ohm.
Parameters:
Name Type Description
resistivity number Electrical resistivity of conductor or material at 20degC, Ohm.m
CSA number Cross-sectional area of cable or conductor, mm2
length number Length of cable or conductor, m
Source:
Returns:
Conductor resistance, Ohm

resistanceDCT(resistivity, CSA, length, temperature, temperatureCoefficient)

d.c. resistance of a conductor at TdegC, Ohm.
Parameters:
Name Type Description
resistivity number Electrical resistivity of conductor or material at 20degC, Ohm.m
CSA number Cross-sectional area of cable or conductor, mm2
length number Length of cable or conductor, m
temperature number Operating temperature of a conductor or material, degC
temperatureCoefficient number Temperature Coefficient (resistance) at 20degC, 1/K
Source:
Returns:
Conductor resistance, Ohm

resistanceDeltaT(resistanceResistance, temperatureBase, temperatureOperating, temperatureCoefficient)

d.c. resistance temperature adjustment. Find resistance at operating temperature given the resistance at the base temperature, Ohm.
Parameters:
Name Type Description
resistanceResistance number of a cable (single conductor) or circuit element, Ohm
temperatureBase number Base temperature of a conductor or material, degC
temperatureOperating number Operating temperature of a conductor or material, degC
temperatureCoefficient number Temperature Coefficient (resistance) at 20degC, 1/K
Source:
Returns:
Conductor resistance, Ohm

verify()

Verify connection and authorisation to the Electrical Functions API server. Returns 'true' if successful.
Source:
Returns:
Returns 'true' if successful

voltage3pLL(voltage)

Calculates the 3-phase Line-line voltage, given the line-neutral. If available standards are used (i.e. 400/230V),otherwise value is calculated.
Parameters:
Name Type Description
voltage number magnitude of the voltage (line-line), V.
Source:
Returns:
Line-line voltage.

voltage3pLLCmplx(voltage)

Calculates the 3-phase Line-line voltage, given the line-neutral. If available standards are used (i.e. 400/230V),otherwise value is calculated.
Parameters:
Name Type Description
voltage complex voltage in complex form (line-line), V.
Source:
Returns:
Line-line voltage.

voltage3pLN(voltage)

Calculates the 3-phase Line-neutral voltage, given the line-line. If available standards are used (i.e. 400/230V),otherwise value is calculated.
Parameters:
Name Type Description
voltage number magnitude of the voltage (line-neutral), V.
Source:
Returns:
Line-neutral voltage.

voltage3pLNCmplx(voltage)

Calculates the 3-phase Line-neutral voltage, given the line-line. If available standards are used (i.e. 400/230V),otherwise value is calculated.
Parameters:
Name Type Description
voltage complex voltage in complex form (line-neutral), V.
Source:
Returns:
Line-neutral voltage.

voltageDropAC(resistance, reactance, current, powerFactor)

AC voltage drop across an impedance (I*Z), V.
Parameters:
Name Type Description
resistance number the resistance of the circuit in Ohm.
reactance number the reactance of the circuit in Ohm.
current number the current flowing in the circuit.
powerFactor number the power factor of the circuit.
Source:
Returns:
Voltage drop.

voltageDropCenelec(voltage, voltagePhase, phase, resistance, reactance, current, powerFactor)

Voltage drop (in V) calculated in accordance with CENELEC technical report CLC/TR 50480. This is intended for calculation of voltage drop across cables, where conductor impedance is known.
Parameters:
Name Type Description
voltage number magnitude of the voltage, V.
voltagePhase number phase angle of the voltage in radians
phase number phase configuration, see =phases()
resistance number the resistance of the cable/circuit in Ohm.
reactance number the reactance of the cable/circuit in Ohm.
current number the current flowing in the cable/circuit, A.
powerFactor number the power factor of the cable/circuit, A.
Source:
Returns:
Voltage drop, V.

voltageDropCenelecCmplx(voltage, phase, impedance, current)

Voltage drop (in V) calculated in accordance with CENELEC technical report CLC/TR 50480. This is intended for calculation of voltage drop across cables, where conductor impedance is known.
Parameters:
Name Type Description
voltage complex voltage in complex form, V.
phase number phase configuration, see =phases()
impedance complex impedance in complex form of the cable/circuit in Ohm.
current complex current in complex form flowing in the cable/circuit, A.
Source:
Returns:
Voltage drop, V.

voltageDropCenelecCmplxPercent(voltage, phase, impedance, current)

Voltage drop (in % decimal) calculated in accordance with CENELEC technical report CLC/TR 50480. This is intended for calculation of voltage drop across cables, where conductor impedance is known.
Parameters:
Name Type Description
voltage complex voltage in complex form, V.
phase number phase configuration, see =phases()
impedance complex impedance in complex form of the cable/circuit in Ohm.
current complex current in complex form flowing in the cable/circuit, A.
Source:
Returns:
Voltage drop, % decimal.

voltageDropCenelecPercent(voltage, voltagePhase, phase, resistance, reactance, current, powerFactor)

Voltage drop (in % decimal) calculated in accordance with CENELEC technical report CLC/TR 50480. This is intended for calculation of voltage drop across cables, where conductor impedance is known.
Parameters:
Name Type Description
voltage number magnitude of the voltage, V.
voltagePhase number phase angle of the voltage in radians
phase number phase configuration, see =phases()
resistance number the resistance of the cable/circuit in Ohm.
reactance number the reactance of the cable/circuit in Ohm.
current number the current flowing in the cable/circuit, A.
powerFactor number the power factor of the cable/circuit, A.
Source:
Returns:
Voltage drop, % decimal.

voltageDropCmplx(impedance, current)

Calculates a voltage drop across a cable or circuit element. Voltage drop across an impedance (I*Z), V.
Parameters:
Name Type Description
impedance complex (complex form) the impedance of the circuit in Ohm.
current complex (complex form) the current of the circuit in A.
Source:
Returns:
Voltage drop, V.

voltageDropDC(resistance, current)

DC voltage drop across a resistance (I*R), V.
Parameters:
Name Type Description
resistance number the resistance of the circuit in Ohm.
current number the current flowing in the circuit.
Source:
Returns:
Voltage drop, V.