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

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

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