The first step in any cable sizing procedure is to determine the actual current that will flow through the circuit. Three-Phase Circuits: is power (Watts), is voltage, and PFcap P cap F is the power factor . 2. Select the Protective Device ( Incap I sub n
VD (V) = √3 × L × I × (R cosφ + X sinφ) (For small cables, X is negligible; use R only as approximation) cable sizing calculations
VD (V) = 2 × L × I × R~cable~ Where R~cable~ = resistance in Ω/km (from manufacturer) The first step in any cable sizing procedure
The first step in any cable sizing procedure is to determine the actual current that will flow through the circuit. Three-Phase Circuits: is power (Watts), is voltage, and PFcap P cap F is the power factor . 2. Select the Protective Device ( Incap I sub n
VD (V) = √3 × L × I × (R cosφ + X sinφ) (For small cables, X is negligible; use R only as approximation)
VD (V) = 2 × L × I × R~cable~ Where R~cable~ = resistance in Ω/km (from manufacturer)