Looking to buy some top quality pvc coated flexible conduit? Here are some advices and extra details helping you to make the best choice.
The ID and OD means inner diameter and outer diamter of flexible conduit. OD is the maximum of flexible conduit, and is a fixed number that can not be deviated from. Flexible conduit are always corrugated inner and outer, so we’d better leave more space inner to make wires and cables easier to through. So we should leave 20% space based on inner diameter. It may sound backward but use the diameter of the conduit as a guide to the service needed. It is better to use a conduit that is too big than one that is too small.
The general procedure for using thin wall conduit is similar to the use of steel armor cable. The big difference is that conduit cannot be “snaked” through openings in ceilings and walls. You must have full access to joists and studs to install electrical conduit. So you probably won’t want to use it unless your local code requires it. IMC is typically used in hazardous locations, and in its stainless steel formulation, IMC is widely used in the food and beverage industry, in chemical plants, in cosmetic and pharmaceutcial industries, in refineries, in pulp and paper mills, in marine and coastal sites, in other corrosive environments. An advantage of IMC is its larger interior diameter compared with RMC of the same nominal sizes, making it easire to pull wires. See more details on Stainless steel flex conduit.
Electrical metallic tubing, or EMT, is the most common type of conduit for exposed interior installations, such as in a basement or an unfinished garage or workshop. It is the lightest and thinnest of the rigid metal conduit types and comes in a few different diameters; 1/2-inch is the most standard size for household circuits. EMT is also called “thin-wall” and is relatively easy to bend with a tool called a conduit bender. EMT is permitted by the National Electrical Code (NEC) for dry and wet locations but requires special watertight fittings and connectors in wet locations. With proper installation, EMT raceway can serve as a circuit ground path and be used in place of a separate ground wire running inside the conduit.
The liquid tight flexible metal conduit (LFMC) is a versatile choice that is not only effective at protecting the wires from damage, but additionally gives reliable waterproof protection. As a way to offer the waterproofing protection, the conduit is coated by using a special jacket that only fits over the top of the the metal. This implies the LFMC great to make use of in any environment, including those areas which may experience difficulties with damp.
EMT is installed with couplings and fittings that are secured with setscrew or compression-type fasteners. The tubing itself is not threaded like RMC and IMC. Common sizes of EMT include 1/2-inch, 3/4-inch, and 1-inch. It is commonly used for exposed indoor wiring runs in residential and light commercial construction. If installed outdoors in exposed locations, it must be assembled with special watertight fittings.
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