Emerson’s Nelson™ Type NC Constant Wattage Heater Cables deliver proven, dependable performance for process temperature maintenance and freeze protection in the most demanding industrial environments. NC cables have undergone rigorous testing to verify they meet specific fire prevention and performance standards set by Factory Mutual (FM) for ordinary and hazardous locations, ensuring safe and reliable thermal performance where fluid flow interruption isn’t an option.
Parallel Resistance Eliminates Single Points of Failure
Nelson NC heater cables employ parallel resistance with nichrome heating elements spirally applied around dual 12-gauge nickel-plated copper bus wires. Zoned construction ensures consistent heat output even if the NC cable is damaged, unlike series resistance designs that fail catastrophically. Only the affected zone stops heating, while the rest of the NC cable continues to function normally. A fluoropolymer sheath provides superior dielectric strength and moisture resistance, while an extruded overjacket protects against impact and abrasion in high-traffic industrial settings.
Application from Pipelines to Dust Suppression
Designed for product pipelines, process water systems, lube oil lines, condensate return, and dust suppression applications, Nelson NC Cables supply power densities up to 12 watts per foot at 208 or 240 VAC. The system maintains process temperatures up to 300°F across cable lengths extending to 665 inches, with voltage options spanning 120 VAC through 277 VAC to match virtually any industrial electrical infrastructure.
Built for Harsh Industrial Environments
Standard construction includes stranded tinned copper metal braid for electromagnetic shielding and grounding. For mechanically abusive applications, optional stainless steel braid provides additional protection. When wet or corrosive conditions are present, customers can specify the optional fluoropolymer over jacket for enhanced chemical resistance.
Nelson NC cables are certified for installation in Class I, Division 2 and Class II, Division 2 hazardous locations containing flammable gases, vapors and liquids, or combustible dusts. Common applications would include fuel storage areas, utility gas plants, solvent processing, pharmaceutical manufacturing, grain elevators, and pipelines in oil facilities.
For more information, visit www.appleton.emerson.com/nelson
