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Thread: Thermal overload switches usage

  1. #1
    Join Date
    Nov 2016
    Location
    CT
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    Thermal overload switches usage

    Can you use thermal overload switches as a fusing device to protect an electric heater?

  2. #2
    Join Date
    Jul 2006
    Location
    San Francisco Bay Area, CA, USA
    Posts
    7,639
    Quote Originally Posted by Zapp20 View Post
    Can you use thermal overload switches as a fusing device to protect an electric heater?
    Only if it is an integral part of the factory assembled heater unit and has been listed and labeled to be used in that manner, which is highly unlikely.

    You are more than welcome to add a thermal OL relay to the circuit for some other purpose above and beyond having a branch short circuit and over current protective device, but not in lieu of it.
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