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PoE / Field-Power Planner

Calculate delivered power and voltage at the device across Ethernet cables

Inputs

Results

How it works

Loop Resistance: Rloop = Rconductor × Length × 2 (for round-trip)

Voltage Drop: Vdrop = I × Rloop

Delivered Power: Pdelivered = (VPSE - Vdrop) × I, clamped to class limit

Based on IEEE 802.3af/at/bt standards. Cable resistances from standard AWG tables.