UL 508A Standard Question

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David Charles

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Location
Kansas City
Occupation
EE
There was a question that came up that i wanted to make sure i had correct.

A 24 volt circuit, supplied from the isolated secondary of a transformer, feeding a 24 volt enclosure heater, can be designed as a control circuit

This is true correct? seeing it is a circuit that carries the electric signal of a controller, but doesn't carry the main power supplied by that isolated secondary transformer.
 
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