Homeowners have an array of options when it comes to hiring an electrician, from paying a one-time fee for an electrical issue to signing up with one company that provides maintenance services on an ongoing basis. Whether you decide to hire an electrician on your own or go through a maintenance program, it’s crucial to know what you’re getting into and how to ensure the quality of your experience in the long term. Here are things you should know about electrical conduits before hiring one.
- Electrical Metallic Tubing (EMT)
Perhaps the most common type of electrical conduit, EMT is a metal pipe typically used to protect wires on overhead poles. Because of its high cost and weight, EMT must be installed by professionals trained in its use. If you’re hiring an electrician, ask if he or she uses it; if not, a cheaper solution may be available.
- Rigid Metal Conduit (RMC)
Rigid metal conduit is usually made of galvanized steel, but some varieties may be made out of aluminum or copper to avoid corrosion. It’s the equivalent of EMT in its use; it’s used for wiring cables and is less expensive than EMT.
- Intermediate Metal Conduit (IMC)
Intermediate Metal Conduit is a hard conduit used for low-voltage wiring, and it comes in several varieties. IMC has threaded ends, which makes it useful for installing wall switches, outlets and ceiling fixtures but also makes it incompatible with EMT or RMC. Some types of IMC are flexible and can be used to bend around corners.
- Flexible Metal Conduit (FMC)
Flexible metal conduit is similar to IMC but is equipped with plastic bushings that make it more flexible for use in tight spaces, such as under counters. FMC is also compatible with EMT, RMC and IMC. The plastic bushings are intended to be removed when long lengths of FMC are being used.
- Liquid-tight Flexible Metal (LFMC)
A liquid-tight flexible metal conduit is often used in outdoor locations where water or other liquids could be present. It’s generally PVC and is made to withstand water pressure up to five pounds per square inch. The conduit is protected by a flexible outer sheath that can withstand water, dirt and other external elements, making it particularly useful for underground wires.
- Electrical Non-Metallic Tubing- ENT
Non-metallic tubing-ENT is a hollow, plastic tube designed to be used in place of metal conduit. It’s less expensive than other options and may be useful for DIYers looking to do electrical work on a budget. However, unlike metal pipes, ENT isn’t underground rated; it may not be appropriate for work in areas where exposure to environmental elements is likely.
- Rigid PVC Conduit
This plastic conduit is frequently used in plumbing applications. It’s not underground rated, but it can be useful in areas that are unlikely to experience extreme temperatures or the presence of moisture. The most common uses for rigid PVC conduit include wiring low-voltage fixtures such as lights or fans.
If you don’t know anything about electrical conduit, it’s time to learn. Conduit is absolutely critical for your electrical system and you definitely want to hire a contractor experienced in installing this kind of piping.