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Old 08-20-2014, 07:49 AM   #1
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Romex thru block wall


I am placing a conduit thru block wall that is soon to me filled with concrete. For the future AC unit I want to run romex from box and go thru the block wall just behind unit. The block and brick together will be twelve inches thick. Can I stub thru wall with a one inch diameter grey pvc conduit about 12 to 13 inches long with a male adapter on both ends. The outside male adapter will connect to the disconnect box and the 8 ga romex for the 1 1/2 ton split unit will go from the inside stud walls thru block/PVC conduit to unit disconnect on outside brick wall. Is this the best way to do this and will it comply with codes?

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Old 08-20-2014, 08:20 AM   #2
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Romex thru block wall


I wouldn't put a male adapter on the inside unless you plan on installing a box.

Are you sure your unit requires #8.
Don't forget the service receptacle within 25' of the unit.

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Old 08-20-2014, 08:56 AM   #3
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Romex thru block wall


I would use car flex.
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Old 08-20-2014, 09:51 AM   #4
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Romex thru block wall


The wire size could possibly be a 10 ga. It will only be a 1 1/2 ton unit and only about 20 feet from main panel. The cut off box will be within three or four feet of the unit. If I don't put a male adapter on the inside can the sharp edge of the plastic conduit be a problem for the romex? Is carflex the flexible weather proof conduit?

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Old 08-20-2014, 10:34 AM   #5
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Romex thru block wall


Quote:
Originally Posted by ddsrph View Post
The wire size could possibly be a 10 ga. It will only be a 1 1/2 ton unit and only about 20 feet from main panel. The cut off box will be within three or four feet of the unit. If I don't put a male adapter on the inside can the sharp edge of the plastic conduit be a problem for the romex? Is carflex the flexible weather proof conduit?

Thanks
JM
Yes. LFNC. Liquid tight flexible non-metallic conduit. There are different brand designations for the product. If you put it through the wall it can be easily cut to size and flexed into the bottom of the disco.
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Old 08-20-2014, 10:35 AM   #6
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Romex thru block wall


You can probably use #12. There is no way you need #8.

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