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drewdin 04-24-2013 01:15 PM

Air Handler wiring question
Hi Guys,

I'm connecting the wires to the Air Handler in the Attic, i was told that I need a disconnect and there is only a 1/2" knockout on the top of the AHU. The disconnect i purchased will mount to the outside of the unit but what about the wire.

Do i need to run it in conduit between the disconnect and the AHU? do I need to run it in conduit to the disconnect and then to the AHU, can I just run the wire into the disconnect and then into the AHU without the conduit?

I just want to make sure I do it right, thanks!

kok328 04-24-2013 03:39 PM

There are 2 approaches to this.
1. run the wire into the disconnect and then run out of the disconnect to the AHU. Using "sealtite" conduit will make the job much easier for a non-electrician.
2. mount the disconnect on the AHU and drill a hole in through the back of the disconnect & AHU. Install a "chase" nipple between the two and then run your wires into the disconnect and out the back of the disconnect into the AHU.
However, given the area where it is being installed, I do not believe conduit is a requirement.

CallMeVilla 04-24-2013 05:33 PM

The "sealtite" is also called "Liquid-tight" ... it is flexible, so any vibration is not going to compromise the connection ... just remember to put connectors in the boxes to prevent wires from touching sharp edges.

drewdin 04-24-2013 06:13 PM

do they sell sealtite at the big box stores? I think i only need a right angle piece to connect the AHU to the disconnect.

nealtw 04-24-2013 09:45 PM

CallMeVilla 04-25-2013 10:20 AM

Actually, this is what you seem to want:

drewdin 04-25-2013 03:56 PM

3 Attachment(s)
Thanks for the links, i was looking in Lowes today and they didnt have much. I took some pictures so you can see what im working with.

I am trying to decide the best location for the disconnect, any suggestions? Thanks

drewdin 04-25-2013 03:57 PM


Originally Posted by CallMeVilla (Post 86393)
Actually, this is what you seem to want:

How does the liquidetight connect? which fittings should i use? Thanks

kok328 04-26-2013 09:39 AM

You will want to install the disconnect within reach of the AHU and where it is easily accessible.
They make several types of sealtite connections and they are pretty much straightforward as to how they connect.

drewdin 05-03-2013 07:32 AM

1 Attachment(s)
Here's the finished project, any suggestions or modifications I should make? Thanks

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