90°C vs 105°C Cable: Efficiency, Reliability & Installation Benefits

Is 105°C really better for underground cable? As utilities seek higher ampacity, critical tradeoffs are often overlooked. This whitepaper compares 90°C vs. 105°C performance, highlighting impacts on losses, overheating, and reliability.
March 27, 2026

This technical whitepaper evaluates 90°C vs. 105°C cable performance in underground distribution systems, examining impacts on ampacity, system losses, accessory performance, soil thermal stability, and installation considerations. While higher temperatures can increase ampacity, they also introduce tradeoffs in efficiency, reliability, and system complexity. The analysis highlights how 90°C cable designs can support more balanced, predictable long-term performance.