What is the difference between Power-Limiting and Self-Regulating?

Both self-regulation and power-limiting cables exhibit a PTC (positive temperature coefficient) resistance characteristic and subsequently power output decreases with increasing temperature.

As self-regulating heating cables increase in temperature they eventually reach a “shut-off” temperature.

Power-limiting cables provide higher power output at higher temperatures; however, as temperature increases power-limiting cables do reach a “shut-off” temperature.