Searching to buy some top quality nylon flexible conduit? Here are some recommendations and extra details helping you to make the best choice. The term “electrical conduit” refers to durable tubing or other types of enclosure used to protect and provide a route for individual electrical wiring conductors. Conduit is typically required where wiring is exposed or where it might be subject to damage. A conduit can be made of metal or plastic and may be rigid or flexible. All conduit is installed with compatible fittings (couplings, elbows, connectors) and electrical boxes, usually made of the same or similar material. Conduit must be installed in accordance with the National Electrical Code (NEC) and all applicable local code rules.
Flexible metal conduit is best known by its nickname “Greenfield,” for its inventor, Harry Greenfield. It is a spiraling metal tubing that bends easily and is commonly used for short, exposed runs in household circuits, such as connections for garbage disposers, hot water heaters and furnaces. FMC is suitable for dry locations only and must be supported every 4 1/2 feet and within 12 inches of each electrical box. It can be used as a ground path only with approved fittings and only where flexibility is not an issue after it is installed. For example, if it’s connected to a motor that vibrates, the conduit cannot be used for grounding.
Flexible metal conduit or FMC, is a helically-wound flexible metal electrical wiring conduit, often made using aluminum such as the ALFlex™ conduit shown here. Flexible metallic electrical conduit is used principally in commercial and industrial construction world wide. In residential applications you may find FMC used to connect an electric oven or electric cooktop. This conduit is also sold as LFMC or liquid-tight flexible metal conduit. See more info at flexible plastic conduit.
The flexible metallic tubing (FMT) is made to give great flexibility and includes a metallic tube-like design. It really is very easy to route or shape to fit probably the most difficult areas. That is why it is great to utilize on the do-it-yourself projects where it is much better to not join multiple components of Stainless Steel Flexible Conduit together. Also, this kind of tubing does not feature any form of waterproof protection.
There are strict regulations in dealing with the fill factor. A cross-sectional area of the conductors inserted would be measured and the code would determine the percent of conduit which could be filled. A conduit can never be filled 100 percent as it is not safe. The code has determined how wires and bundles of wires can safely run through a given flexible conduit. The table does not address any difference in high or low voltage cables so you can apply the table for both uses. Have this information readily available when shopping for conduits.
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