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What are the maximum circuits for Warmup non-jacketed cable?

1 min read · Updated Feb 2026

Unjacketed Cable Maximum Circuit Lengths

Based on available amperage or breaker rating, limit the total length of cable on the circuit based on the chart below. Your region’s “Minimum Start-up Temperature” will impact your maximum cable length.

 

(120V) 10A 15A 20A
32F/0C 107 127 133
14F/-10C 95 105 120
0F/-18C 73 93 113
-20F/-30C 60 80 107

Warmup's unjacketed self-regulating cable applied to a pipe following maximum circuit length parameters.

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