AC Coolant Lines and Electric Cables in Gutter Downspout?

Sep 02, 2007 Last reply: 4 years ago 10 Replies

"Coolant lines and electrical cables to the second or third floors can often be concealed in sections of gutter downspout material that is attached to the side of the house."



Anybody ever heard of this? Does the NEC allow allow it?



And, yes, I know he doesn't mean the same downspouts as the ones attached to the gutters.



As long as the electrical wiring is in approved conduit, FIRST.

We do it all the time. Just make sure the wiring is rated for outdoor use. UF and SEU cable for instance. The HVAC supply houses sell a plastic duct system that is used primarily for mini-split AC units. It could be used also.

[8~{} Uncle Monster

on 9/1/2007 11:10 PM DerbyDad03 said the following:

It's done all the time around here. A piece of white 'plastic' downspout running from the AC unit on the ground straight up the siding to the attic where they enter the wall.

They are frequently used here in New Jersey. However it is only for cosmetic purposes. The electrical cable or conduit and fittings are all approved for outdoor use.

Thanks to all. I had never heard of it and was just curious.

Usually we just get an aluminum "line set cover" that screws to the side of the house. The advantage is you don't have to thread the line set down a drain pipe and it is more securely fastened yet easy to access if you need to.

Just to clarify a little what other posters have said, there's a product specifically made for this purpose that looks almost exactly like downspout. Google "slimduct".

Eric Law

on 9/3/2007 2:57 PM snipped-for-privacy@aol.com said the following:

The guy that installed my AC, used a plastic downspout which he sliced down the back with a circular saw and then spread it over the tubes and secured it with downspout clamps, so there was no need to thread the tubes through it..

Can I run the UF wiring in the exterior ductwork with condensate piping going from the compressor outside to blower inside?

The question is whether the AHJ will let you use UF for an AC condenser. Some want to see some kind of conduit or Carflex (liquid tite). YMMV depending on how they look at "subject to physical damage".

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