Conduits protect the conductors inside them from various environmental factors. The can also simplify construction and repair work, making it easy to access wires and move them through the building. Conduit sizes can vary in size from 1/4 inches on up, with each conduit size having different threads per inch as well as inside and outside dimensions. The knockout size will vary with each conduit size. There are several different types of conduits (for example, rigid or flexible and metallic, PVC, or aluminum) and each has different dimensions as well as different uses. Be sure to use the correct conduit for the correct job. The different conduit style will vary its pricing as well. Below are some typical price comparisons between electrical conduits. It goes without saying that where you buy you conduit and the quantity you can purchase at one time will also determine your final price. The guide below is for 3 common styles of conduit that the average person can buy, using common dimensions, from their local home improvement store.
How Conduit is Sold
The conduit used in this comparison is UL listed and sold as new and not reused. All prices were derived from larger retailers and are a good average of the going market rate. Flexible conduit will be sold in roll form, usually ranging in lengths of either 50 linear feet or 100 linear feet. The larger the size of conduit, the smaller the roll size will be. Rigid metallic conduit is sold in shorter lengths for ease of use. It is sold in 10 foot lengths. You can also buy rigid metallic conduit in pre-bent pieces to alleviate the need to bend your own conduit. For the use of this example, only straight conduit is used.
Flexible Metallic Conduit
This type of conduit is generally sold in rolls. Below are types of pricing that you can expect for this type of conduit:
- $0.68 per linear foot for 1/2 inch size
- $0.92 per linear foot for 3/4 inch size
- $1.68 per linear foot for 1 inch size
Rigid Metallic Conduit
This type of conduit is sold in 10 foot pieces. Below are types of pricing that you can expect for this type of conduit:
- $0.77 per linear foot for 1/2 inch size
- $1.16 per linear foot for 3/4 inch size
- $1.59 per linear foot for 1 inch size
Flexible Non-Jacketed Conduit
Below are types of pricing that you can expect for this type of conduit:
- $0.42 per linear foot for 1/2 inch size
- $0.58 per linear foot for 3/4 inch size
- $0.60 per linear foot for 1 inch size
Pricing Differences Defined
When looking at the pricing, you can see that, as expected, a larger diameter conduit will be more expensive than a smaller diameter conduit. The flexible metallic conduit is the most expensive of the three choices listed. If you are faced with a situation where you need numerous conduit bends, have to fit into a small area, or you have a difficult bend, the flexible metallic conduit would be your obvious choice, despite the cost. The flexible non-jacketed conduit is made of lightweight aluminum that is very strong. If you application allows its use, the cost is substantially cheaper than the FMC. Rigid metallic conduit is a standard choice in many applications due to its capabilities. It is perfect for installation where there are long expanses of straight lines. It is nearly the same price as the flexible metallic conduit.