Burden Resistor calculation

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Burden Resistor Formulae

R = (Vcc * Nturns) / (2√2 * Irms)

R: Burden resistor value in Ohm
Vcc: ADC max voltage range (usually 3.3V)
Nturns: Number of CT sensor turns (see specs). SCT-013 is 2000 turns. SCT-019 is 6000.
Irms: Max current to be read in rms

Current Coefficient Formulae

This will compute ICAL.

ICAL = Nturns / R

ICAL: Current Coefficient
Nturns: Number of CT sensor turns
R: Burden resistor value in Ohm