aluminum conduit and concrete?

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Old 12-11-11, 08:04 PM
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aluminum conduit and concrete?

Some things that you should keep in mind with aluminum conduit, is the fact that it is unable to be embedded directly onto concrete


after reading that, i was wondering is it ok to feed thru concrete block and permastone? or does that count as embedded
 
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Old 12-11-11, 08:18 PM
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In my opinion, the answer would be NO. Aluminum MC cable may not be run on either masonry or concrete surfaces nor can it be run through walls of that type construction. I am sure that would also apply to aluminum rigid threaded conduit as well. I recently saw a piece of aluminum MC cable that had been run through a masonry wall and the aluminum sheathing was corroded to the point that there was nothing left except for the conductors for about 8 inches where the sheathing had been in contact with the masonry.
 
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Old 12-11-11, 08:38 PM
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sounds like PVC is the way to go then

i'm assuming the aluminum can be used against wood though.
 
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Old 12-12-11, 05:47 PM
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Sure, aluminum conduit can be surface mounted on wood. My preference for embedding in concrete would be PVC conduit. If a flexible conduit or cable is needed to be surface mounted on masonry or concrete, I would use steel MC cable or steel greenfield.
 
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Old 12-13-11, 08:00 AM
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i luckily discovered lowes sells flexible rubber by the foot! ez to install thru the wall if you dont drill straight through

and then i just noticed that the old garage key opener outside my garage has an aluminum conduit and the rust mark goes several feet down the wall
 
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Old 12-13-11, 08:55 AM
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i luckily discovered lowes sells flexible rubber by the foot! ez to install thru the wall
If you mean rubber hose that is not an approved conduit. Do you mean SealTite?

i just noticed that the old garage key opener outside my garage has an aluminum conduit and the rust mark goes several feet down the wall
Rust is ferric oxide. More likely the conduit is steel.
 
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Old 12-13-11, 08:59 AM
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no clue what it is...just stuck in the aisle under the pvc conduit. saved me a lotta work trying to line up the holes
 
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Old 12-13-11, 09:09 AM
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So long as you used PVC conduit you should be fine.
 
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Old 12-13-11, 09:29 AM
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can UF be painted..just curious for future projects
 
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Old 12-14-11, 10:33 AM
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Yes UF can be painted with standard house paint. I don't know of a specific prohibition against it, but I would avoid using any particularly nasty paints on it as the solvents might break down the PVC sheath.
 
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Old 12-15-11, 06:53 AM
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cool i may just hang it under my soffits for my summer lighting project next year..just basic latex, nothing harsh. just to match white soffit. undecided about conduit or not under there, have to test things out what looks worse..bare sorta 'wiry' wire or big old 1/2 inch painted pvc
 
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Old 12-15-11, 02:35 PM
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Just my opinion, but I think EMT or RMC look far better unpainted than UF looks painted or unpainted.
 
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Old 12-15-11, 02:41 PM
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Any non-flexible conduit looks better than UF.
 
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Old 12-16-11, 07:32 AM
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but it's such a pretty wire and fun to use...i'm soooo glad i got the 20 dollar stripper at lowes..anyone who even has one project to do should get such a stripper!

i do like the 'cleaner' look of conduit vs straggly cable, but until i actually hang up a test piece next year, i wont know for sure

i also need to run a 'test light' hanging up to see what i need. the 13 w cfl is more than bright enough for my driveway even when i just hung up one temporarily..so for ligthing all around the house i'd think it will be fine as well.
 
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