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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.
What do you use to support conduit when is suspended in a ceiling?
To support conduit that is suspended in a ceiling, you typically use conduit hangers or straps. These devices secure the conduit to the structural elements of the ceiling, such as beams or joists, ensuring stability and compliance with electrical codes. Additionally, you may use threaded rods or wire for added support, especially over longer spans. Proper spacing between supports is also essential for maintaining the integrity of the installation.
