Since there are so many kinds of electrical wire in the industry you will have to determine where it’s going to be installed and just how much power must run through it before buying anything. Certain cables are equipped for indoor use while others are designed for outdoor usage and their price is directly affected by the amount they can handle. More work by engineers and higher manufacturing expenses are the result of China Feeder Cable.
NMB stands for Non Metallic as there is a “metallic” electrical cable used outdoors and in conduit. The non metallic version is used indoor only at a much cheaper price. The floor wire doesn’t need to be insulated as well as the outer jacket doesn’t need excessive protection. The primary reason for the jacket is made for the contractor so that you can run multiple electrical wires at once instead of individually.
UFB stands for Underground Feeder because it’s employed for installations that are buried directly in the ground without conduit. It’s a flat cable as well as the tough PVC jacket covers each THHN wire individually for additional protection. Again, this cable could be buried in the ground without conduit but it will likely be far more expensive than NMB cable as a result of additional approvals and manufacturing costs.
There’s also Foam Cable in between those two, in cost, and in the environmental installation abilities. MC cable stands for Metal Clad which is the “metallic” cable mentioned previously. The metallic (aluminum interlocked armor) jacket wraps around all the THHN conductors allowing it to be utilized outdoors and then in conduit applications. Additionally, it passes as its own conduit for indoor applications only. Many times a contractor will, first, must run conduit and then install an NMB cable indoors. However, now they can simply buy MC cable and set it up without conduit in order to save time. MC cable is not really approved for direct burial in the earth.
Consider the 3 main electrical installations which can be indoors, outdoors and underground. Additional approvals and requirements are needed for each and every environmental change. Also, more engineering and manufacturing costs are needed to create the more difficult cables like UFB Underground Feeder. The one thing they all have in common will be the inner conductors of THHN THWN. The modification is more in the jacket material compared to the inner conductor insulation because that’s where most of the protection originates from.
Make sure you call your wire and cable supplier before you make any purchase so you don’t over spend or perhaps under estimate the amount of protection you will need. Underground wires and cables are generally wgzjmp for locations where space is scarce. Usually, it are available in cities where safety is also a primary importance. Therefore, power lines need to be dug to the ground as opposed to up inside the air to prevent risks. There are different types of wires and cables utilized for underground installation. In most cases, installers must be focused on two things: safety of the cable and just how large it really is. After all, although protected from outside risk, Ground Buss Bar would be difficult to fix due to its location. Therefore, homeowners would need to ensure that they get something durable to lower fixes. That being said, following are some kinds of underground cables and wires being used today.
This is potentially by far the most widely used inside the list. The Underground Feeder or UF is especially made for underground use and is also therefore durable enough to stand up to long time periods. The product is even usable in wet locations which will make it ideal for the town setting. Sometimes, UF is also found in interior locations.