Heat Trace Tape For Gutters

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Squantum

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Does anyone have any experience with Heat Trace Cable? The cable product by Heat Trace Products LLC. # 28061. is listed for 6 watts a foot @ 40 degrees F. The tech chart also states that the the cable may operate (maximum) of 12 watts a foot in ice water conditions. The gate keeper at the factory is not supportive, she has referred me too the product vendor. So what do I use for my calculations? 6 watts or 12 watts ? I have two runs, at 100' and the other @140'. The cable is rated for 120 volts. Thank you in advance.

http://www.rscc-heattrace.com/2800-series-features.html
 
Squantum said:
Does anyone have any experience with Heat Trace Cable? The cable product by Heat Trace Products LLC. # 28061. is listed for 6 watts a foot @ 40 degrees F. The tech chart also states that the the cable may operate (maximum) of 12 watts a foot in ice water conditions. The gate keeper at the factory is not supportive, she has referred me too the product vendor. So what do I use for my calculations? 6 watts or 12 watts ? I have two runs, at 100' and the other @140'. The cable is rated for 120 volts. Thank you in advance.

http://www.rscc-heattrace.com/2800-series-features.html
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First you need to realize that in ice water conditions the tape will not be able to raise its temperature above 32F. In real life, especially if there is insulation over the heat tape, the heat tape will get the pipe and itself up to a higher temperature than the air around itself.
Not knowing the actual temperature conditions where the pipe will be installed, the best I can say is that the cable will draw anywhere from less than 6W/ft in mild weather to perhaps even more than 12W/ft in arctic weather with poor insulation. But at the point where it starts to draw more than 12W, the pipe will likely be frozen already, since the tape could not get it above 32F.
 
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