A: No. This type of metal flex is not water-tight. It would fill up with water, sand and cement and likely destroy the wires. I would use IMC conduit in concrete. Use a pipe sealant like recto-seal on all of the threaded connections.
A: Yes. It is not water-tight, so dry locations only. Support about every 16" as you would with Romex. It is REALLY hard to pull wire through 3/8" FLEX once it is installed. 1/2" and larger FLEX is much easier.
A: The nominal Diameter of #12 Thhn is .118 inches. It would be okay to use 3/8 in. Flex Steel Conduit. Within this situation, the conduit fill is: 9.44%The above advice is based upon the current edition of the National Electric Code (NEC). Free access to the latest version of the NEC is available online at www.nfpa.org/freeaccess. The NEC and local building codes regulate the types of wire and cable that can be used in specific electrical applications, as well as the manner of installation. Check your local building codes before you start any wiring and cable electrical project and be sure to obtain required permits. When your work is complete, always have it inspected for compliance with local codes to ensure that it has been safely installed.
A: No it isn’t watertight. Instead, look for a flex conduit that is liquid-tight like the following: http://www.homedepot.com/p/Southwire-Liquidtite-1-2-X-100-ft-Met-Titan-Conduit-55082603/202819638
current item | |||
Conduit Type | |||
---|---|---|---|
EMT (Electrical Metal) | PVC | EMT (Electrical Metal) | EMT (Electrical Metal) |
Material | |||
Steel | PVC | Steel | Steel |
Conduit Trade Size | |||
3/8 | 1/2 | 3/8 | 1/2 |
Product Length (ft.) | |||
25 ft | 25 ft | 50 ft | 25 ft |
Metallic/Non-Metallic | |||
Metallic | Non-Metallic | Metallic | Metallic |
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