Temperature termination rating, what is the meaning?

[No5]

60, 75 and 90 represent the common temperature termination rating of device connection points to wiring beyond the device. What does the number represent as in regards to the device? Does a 60 deg C device have the possibility to have its connection point heat to 60 C, therefore the conductor on that lug must have a amperage rating of at least full load current and 60 deg insulation? Where does this information come from, UL, CSA or the manufacturer? What is the test procedure to establish the temperature rating?

Any help locating that info would be greatly appreciated.

[CraigEl]

@No5 what Schneider Electric product does your question relate to?

[Emer · Accepted solution]

The temperature termination rating (like 60, 75, or 90 degrees C) tells you how hot the connection point can safely get. So, if it's rated for 60°C, it means the connection shouldn't get hotter than that. You need to use conductors that are rated for at least that temperature to handle the full load. This info usually comes from UL, CSA, or the manufacturer. They test it by running the device under load until it reaches a stable temperature to make sure it doesn't go over the rating.