Does low voltage (24VAC/24VDC) wiring need to be in conduit? Fan Motor Application

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tmsiwayne

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Norwalk, Oh USA
I am looking to find a solution (USA - most any state...) when running wiring from a control cabinet to Ventilators (Fan Motor) which will limit or eliminate the requirement of conduit ($Cost$). I like the idea of switching to a 24VDC motor - running 24 VAC to the box at the fan motor and converting to 24VDC inside before terminating at the motor, as it seems safer to me and may not require a conduit for the cabling in many cases (Going through walls/floors- will require conduit).

This will have a trade off at some point when the fan size becomes large enough that high voltage and conduit runs will be less expensive. For smaller units my initial thoughts are that low voltage may prove advantageous.

I would appreciate feedback/insight, others must have gone down this road before me. ~ thanks
 
Low voltage does not mean safe from fire. When conduit is required is determined by the energy classification. Start with Art 725 and determine what class wiring the system will be.
And there are cable type wiring methods that would be suitable for 120 volts, such as tray cable.
 
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