Cold Weather Catalog - Chromalox Precision Heat and Control

Heating CableSRFApplication & Selection GuidelinesCommercial Freeze ProtectionSRF Cable Selection ChartsThese charts are designed to speed selectionof the appropriate wattage of cable when usedfor freeze protection. Find the diameter of pipebelow and cross reference with the expectedminimum ambient temperature for the recommendedcable.• Selections suitable for 120 and 208 to 277Vapplications.• Design based on straight runs of cable orpipe. Spiralling is not required.• Heat loss is based on 40°F maintenancetemperature and Fiberglas ® insulationk = 0.25 at 50°F.• Non-metallic pipe heat losses are based onusing Chromalox AT-1 aluminum tape forimproving heat transfer.• Only 3 W/Ft. rating is UL Listed for nonmetallicpipe applications, however, 5W/Ft.and 8 W/Ft. can be used.Metal PipeCable RatingSRF3x1SRF3x1# RunsPlastic PipeEach block specifi es cable rating and # of runsfor metal pipe (dark) and plastic pipe (light).For larger pipe sizes, refer to the Technicalsection in the back of this catalog or contactyour Local Chromalox Sales offi ce.Note – AT-1 Aluminum tape must be used onplastic pipe installation0.50" PipeInsulation Thickness (In.)1.00" PipeMin. Ambient Temp.O˚ -10˚ -20˚ -30˚ -40˚SRF3 SRF5 SRF5 SRF5 SRF80.5 x1SRF5x1SRF5x1SRF5x1SRF8x1SRF8x1x1x1x1x1SRF3 SRF3 SRF3 SRF5 SRF51.0 x1SRF3x1SRF3x1SRF3x1SRF5x1SRF5x1x1x1x1x1SRF3 SRF3 SRF3 SRF3 SRF31.5 x1SRF3x1SRF3x1SRF3x1SRF3x1SRF5x1x1x1x1x1SRF3 SRF3 SRF3 SRF3 SRF32.0 x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1x1x1x1x1SRF3 SRF3 SRF3 SRF3 SRF33.0 x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1x1 x1x1x1Insulation Thickness (In.)0.51.01.52.03.0Min. Ambient Temp.O˚ -10˚ -20˚ -30˚ -40˚SRF3 SRF3 SRF5x1SRF3x1SRF3x1SRF5x1x1x1SRF3 SRF3 SRF3x1SRF3x1SRF3x1SRF3x1x1x1SRF3 SRF3 SRF3x1SRF3x1SRF3x1SRF3x1x1x1SRF3 SRF3 SRF3x1SRF3x1SRF3x1SRF3x1x1x1SRF3 SRF3 SRF3x1SRF3x1SRF3x1SRF3x1 x1x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF5x1SRF5x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x1SRF3x13.00" PipeMin. Ambient Temp.O˚ -10˚ -20˚ -30˚ -40˚SRF8 SRF8 SRF5 SRF5 SRF50.5 x1SRF8x1SRF5x2SRF8x2SRF8x2SRF8x1x2x2x2x2SRF5 SRF5 SRF5 SRF8 SRF81.0 x1SRF5x1SRF8x1SRF8x1SRF8x1SRF8x1x1x1x1x1SRF3 SRF3 SRF5 SRF5 SRF51.5 x1SRF5x1SRF5x1SRF5x1SRF8x1SRF8x1x1x1x1x1SRF3 SRF3 SRF3 SRF5 SRF52.0 x1SRF3x1SRF5x1SRF5x1SRF5x1SRF5x1x1x1x1x1SRF3 SRF3 SRF3 SRF3 SRF53.0 x1SRF3x1SRF3x1SRF3x1SRF5x1SRF5x1x1 x1x1x1Insulation Thickness (In.)4.00" PipeMin. Ambient Temp.O˚ -10˚ -20˚ -30˚ -40˚SRF8 SRF5 SRF8 SRF8 SRF50.5 x1SRF5x2SRF8x2SRF8x2SRF8x3SRF8x2x2x2x2x3SRF5 SRF8 SRF8 SRF8 SRF51.0 x1SRF8x1SRF8x1SRF8x1SRF5x2SRF8x1x1x1x2x2SRF3 SRF3 SRF5 SRF8 SRF81.5 x1SRF5x1SRF5x1SRF8x1SRF8x1SRF8x1x1x1x1x1SRF3 SRF3 SRF5 SRF5 SRF52.0 x1SRF5x1SRF5x1SRF5x1SRF8x1SRF8x1x1x1x1x1SRF3 SRF3 SRF3 SRF5 SRF53.0 x1SRF3x1SRF3x1SRF5x1SRF5x1SRF5x1x1 x1x1x1Insulation Thickness (In.)2.00" PipeMin. Ambient Temp.5.00" PipeMin. Ambient Temp.O˚ -10˚ -20˚ -30˚ -40˚O˚ -10˚ -20˚ -30˚ -40˚SRF5 SRF8 SRF8 SRF8 SRF5SRF5 SRF8 SRF8 SRF80.5 x1SRF8x1SRF8x1SRF8x1SRF5x2SRF80.5 x2SRF8x2SRF8x2SRF8x3SRF8x1x1x1x2x2x2x2x3x3SRF3 SRF5 SRF3 SRF5 SRF8SRF8 SRF8 SRF8 SRF51.0 x1SRF5x1SRF5x1SRF5x1SRF8x1SRF81.0 x1SRF8x1SRF8x1SRF5x2SRF8x1x1x1x1x1x1x1x2x2SRF3 SRF3 SRF3 SRF5 SRF5SRF5 SRF5 SRF8 SRF81.5 x1SRF3x1SRF3x1SRF5x1SRF5x1SRF51.5 x1SRF5x1SRF8x1SRF8x1SRF8x1x1x1x1x1x1x1x1x1SRF3 SRF5 SRF3 SRF3 SRF5SRF3 SRF3 SRF5 SRF82.0 x1SRF3x1SRF3x1SRF3x1SRF5x1SRF52.0 x1SRF5x1SRF5x1SRF8x1SRF8x1x1x1x1x1x1x1x1x1SRF3 SRF3 SRF3 SRF3 SRF3SRF3 SRF3 SRF5 SRF53.0 x1SRF3x1SRF3x1SRF3x1SRF3x1SRF53.0 x1SRF3x1SRF5x1SRF5x1SRF5x1x1 x1x1x1x1x1 x1x1Insulation Thickness (In.)106Insulation Thickness (In.)SRF8x3SRF8x3SRF5x2SRF8x2SRF8x1SRF5x2SRF8x1SRF8x1SRF5x1SRF8x1