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

Non-Jacketed Self-Regulating Cable

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