The phrase “electrical conduit” refers to long-lasting tubing or other forms of enclosures used to protect and route individual electrical wire conductors. Conduit is often necessary where wire is exposed or at risk of harm. A conduit can be stiff or flexible, and it can be composed of metal or plastic. All conduit is installed with suitable fittings (couplings, elbows, connectors) and electrical boxes, which are often constructed of the same or comparable material as the conduit.
These are 6 types of electrical conduit fittings in Malaysia:
1. Rigid metal conduit
Rigid metal conduit is made of heavy-duty galvanized steel tube and threaded fittings. It is commonly used outside to guard against damage and may also offer structural support for electrical wires, panels, and other equipment. RMC is available in 10- and 20-foot lengths, with threads on both ends. Rigid metal is one of the most expensive electrical wire choices on the market. It does, however, provide far more strength and durability, which is a major benefit.
2. Rigid PVC conduit
Rigid polyvinyl chloride (PVC) is comparable to plastic plumbing pipe and is fitted with glued-in plastic fittings. After being heated in a portable heater box, it may be bent. Because the conduit tubing and fittings are bonded together, the conduit assemblies can be waterproof, allowing PVC to be directly buried in the ground for many purposes. Even though it is permitted in corrosive environments, PVC conduit is not advised for use in locations where direct sunlight is excessively exposed. Natural light from the sun degrades the materials over time.
3. Flexible metal conduit
Flexible metal conduit is very flexible due to its spiral structure. FMC’s flexibility allows it to pass through walls and even other buildings. Standard FMC is often utilized in dry indoor settings with short run times. Liquid-tight flexible metal conduit (LFMC) is a form of flexible metal conduit with a plastic covering that is waterproof when used with sealed fittings.
4. Electrical metallic tubing
One notable example of an unbending conduit is the electrical metal tube (EMT). It is often constructed of galvanized steel, although it may also be made of aluminium. Because it is thinner and lighter than RMC, EMT is sometimes referred to as a “thin-wall” conduit. It may also be stiff, although it may be readily bent using a simple instrument known as a conduit bender. Setscrew or compression-type fasteners are used to secure EMT couplings and fittings. It must be assembled with appropriate waterproof connections if put outside in exposed places.
5. Electrical non-metallic tubing
Electrical non-metallic tubing (ENT) is a moisture-resistant and flame-retardant flexible corrugated plastic tubing. It bends easily and is installed with snap-lock or bonded plastic fittings. Non-metallic tubing, unlike EMT, cannot be placed in exposed places, thus it is typically utilized inside walls. ENT can be put within concrete block constructions and coated with concrete, in addition to traditional wood- or metal-frame walls.
6. Intermediate metal conduit
The intermediate metal conduit is most likely a lighter-weight, thinner variant of RMC. However, it is similarly authorized for use in all comparable applications, as is RMC. IMC is more commonly used in construction in some situations since it is lighter and easier to deal with. It also provides the same level of protection as RMC and is seen as a more cost-effective choice due to its relatively low cost.