Circuit protection depends on the length of cable required and the start-up temperature since the cable will draw more power (wattage) when cold
Larger amperage circuits breakers can handle longer combined cable lengths
But the maximum length for a single cable run does not change
The nec requires the use of ground fault protection breakers for heating cable
Detailed Description: King Electrical SR Series Self regulating heating cable has a voltage rating of 120 Volts and power rating of 5 Watts. It has jacket where outer material is made of rugged UV protected polyolefin and inner material is made of flame retardant durable thermoplastic. Cable features self regulating that protects from overheating and burning while overlapped. It can be used in plastic or metallic pipes. Multiple cables can be connected from a single power circuit up to maximum combined length. Cable finds applications in various industrial and commercial pipe trace applications. Cable is cULus listed.