At 55°C ambient, the factor is .
Electricity creates heat (resistance). If the surrounding environment is already hot (like an attic in summer) or if there are too many wires bundled together generating heat, the wire’s insulation can soften, melt, or degrade. This leads to short circuits and fire hazards. Derating ensures the wire stays within a safe temperature range.
At 55°C ambient, the factor is .
Electricity creates heat (resistance). If the surrounding environment is already hot (like an attic in summer) or if there are too many wires bundled together generating heat, the wire’s insulation can soften, melt, or degrade. This leads to short circuits and fire hazards. Derating ensures the wire stays within a safe temperature range. wire derating chart
