Single-core cable: one conductor inside insulation, superior heat dissipation & higher ampacity. Rigid, eddy current prevention required for AC layout.
Multi-core cable: multiple insulated cores under one sheath, flexible & easy installation. Heat dissipation limited with higher temperature rise under heavy load.
Pick single core for high voltage, large current fixed wiring. Multi-core for low voltage indoor wiring, movable equipment & tight space installation.
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