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It depends upon the construction of the building as to what type of electrical system is used. If the building is of a wood frame then ordinary home wiring system can be used. If the use of steel studs is involved then BX has to be used for the internal wiring. Where the cables come out of the walls to equipment, they have to be mechanically protected with conduit or flexible conduit.
If the building is block or brick and the wiring system has to be installed on the surface, the system has to be conduit. If the installation is not engineered and no stipulation as to what type of conduit system has to be used, then go with EMT. EMT systems are labour and material wise cheaper than a threaded rigid system. To make the job look professional you need to hire someone that is good at bending EMT conduit. Ask to see other jobs that the contractor has done before letting out the contract.
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What is the hole size required for a 2.5 conduit?
A trade size hole for a 2-1/2" EMT conduit connector, the hole needs to be 2-7/8" in diameter. A 3" rigid conduit can also use this size hole without the lock nuts falling into the hole.
Which one is cheaper PVC conduit or emt conduit?
PVC is cheaper but is used differently. PVC is usually baried in ground and emt usually runs exposed. You can use PVC exposed if it is schedule 80 gray PVC electrical conduit. Schedule 40 is for under ground
Can you use PVC pipe to wire a barn?
Yes, if it is rigid PVC conduit approved for electrical installations. Don't use PVC water pipe as it will be rejected if inspected.
Does commercial electrical wiring have to be in conduit if it is behind a wall covering?
It depends on whether the building classification is combustible or non combustible. On a new commercial building wiring is usually designed by an electrical engineer. In this case the wiring is done to their specifications. On a rewire of a commercial building BX cable can be used behind wall board. The reasoning is that most commercial buildings these days use steel studs. Dragging ordinary NMD wire through these types of studs can cut the outer sheath. In some jurisdictions steel stud bushings have to be used when a steel stud is hole punched. By using this type of wiring cable, rigid conduit or EMT does not have to be used.
How many bends in a conduit run would be required before the use of a pull box?
There has to be a pull box between every four quarter bends in a conduit run.
What is another name for thin wall conduit?
Another name for thin wall conduit is EMT (Electrical Metallic Tubing). It is a type of conduit made of steel that is commonly used for protecting and routing electrical wiring in commercial and industrial construction.
What is the hole size required for a 2.5 conduit?
A trade size hole for a 2-1/2" EMT conduit connector, the hole needs to be 2-7/8" in diameter. A 3" rigid conduit can also use this size hole without the lock nuts falling into the hole.
Which one is cheaper PVC conduit or emt conduit?
PVC is cheaper but is used differently. PVC is usually baried in ground and emt usually runs exposed. You can use PVC exposed if it is schedule 80 gray PVC electrical conduit. Schedule 40 is for under ground
What size rigid conduit for 400 amp service?
For a 400 amp service, you would typically use a minimum of 3-inch rigid metal conduit (RMC) to accommodate the large conductors required for that amperage. It's essential to consult local electrical codes and regulations to ensure compliance with sizing requirements for your specific installation.
Do you need to use a Myers hub if you penetrate the bottom of a NEMA 3R junction box with rigid conduit?
Yes, if you are penetrating the bottom of a NEMA 3R junction box with rigid conduit, you should use a Myers hub to ensure a watertight seal and protect the wiring inside from environmental elements. Myers hubs are designed to provide a secure connection between the conduit and junction box.
Can you use non metallic cable in half inch electrical metallic tubing conduit?
No, non-metallic cable (such as Romex) cannot be used in electrical metallic tubing (EMT) conduit. EMT is designed to house and protect electrical wiring, so it is meant to contain only electrical wires, not non-metallic cables. It is important to use the appropriate type of wiring for the specific conduit being used.
Can you use PVC pipe to wire a barn?
Yes, if it is rigid PVC conduit approved for electrical installations. Don't use PVC water pipe as it will be rejected if inspected.
If you have a motor that must remain adaptable to several sizes of belts what is the maximum length of flexible metal conduit you can use before the conduit requires fastening?
Adding an extra length of shaft on the existing shaft to take extra pulleys will put an extra load on the bearings supporting the shaft. In the long term this would shorten the life of the bearings. The makers might be able to supply more information like the side-load specification for the bearings. If in doubt support the outer end of the shaft.
Can you use EMT in class 2 division 2 locations?
No. The definition of Class 2 - Division 2 is - Where ignitable concentrations of combustible dust are present within the atmosphere under abnormal operating conditions. A threaded metal conduit orcables approved for hazardous locations must be used. This eliminates the use of EMT (Electrical Metallic Tubing).
What type of pipe is used in pipe fences?
EMT (Electro-metallic tubing) is generally used in pipe-framed fences. This is the solid-wall conduit that electricians use, generally 1.5 to 3 inch diameter.
At what voltage do you need to use double locknuts on Rigid Metal Conduit?
There are no voltage regulations. A rigid conduit system used two locknuts and one bushing at every connection to a junction box unless the box has a hub. One outside the box and the other locknut inside the box. These are tightened against each other to make the connection secure and to scratch the paint on the outside of the box to make continuity of the metallic system. Continuity of the system is a must as this is the return path for any short circuit that might occur. Rigid connections to fittings require no locknuts as the conduit's threaded end screws into the fitting.
What size conduit should be used with 8-3 gauge wire?
For 8-3 gauge wire, a 1-inch conduit is typically recommended for adequate spacing and protection. However, it's always best to consult local electrical codes and regulations to ensure compliance with specific requirements for your installation.
