Romex is permitted in commercial buildings that are categories 3, 4, and 5. If put in conduit, romex may be installed in type 1 and type 2 construction. Conduit is generally necessary where wire is exposed or at risk of harm.
Category 3 construction includes any building over 10 years old that is not a residence. Category 4 construction includes any building over 20 years old that is not a residence. Category 5 construction includes any building over 30 years old that is not a residence. These categories can change depending on the city or county you live in. Your local building department should be able to provide more information about what types of buildings are allowed in your area.
The wiring in a commercial building is responsible for powering equipment used in connection with business operations. This includes lighting, heating, air-conditioning, alarm systems, and other appliances. The wiring also supplies power to any machinery used in manufacturing or production processes. Finally, the wiring serves as the communications network for phones, computers, and other devices required for running a business.
Like most other forms of wiring, romex must be installed by a qualified electrician. Any damage to the exterior of the building caused by cutting into the exterior wall surface or removing metal fasteners will need to be repaired before romex can be inserted into the wall.
"NO, you cannot use romex in a conduit," is the short response. The long answer is yes, but only if you're willing to take the risk. It's not recommended because if there's any damage to the wiring inside the conduit, it can't be repaired from outside the conduit. The only way to fix it is to cut the conduit open and access the wire itself.
Romex cable is made up of several different types of wires inside a plastic tube. If one or more of these wires gets damaged, it can cause a circuit to open when it shouldn't. This could be anything from a small section of a wire being broken off to all the copper inside the tube being exposed. To prevent this from happening, cable companies give circuits a "maintenance rating" to indicate how often they should be checked for damage. For example, some circuits may be checked every other year while others may only need to be checked once during installation of the cable.
If you were to put romex cable in conduit, then even if there was no damage to any of the individual wires inside the cable, you would still have to check the whole cable every time you added or removed something that might affect a circuit.
There are several areas where installing Romex in commercial buildings is prohibited. Places prone to physical damage, structures with a fire rating, places of assembly such as occupancies of more than 50 people, and structures with more than three stories are also permitted to be wired in Romex as long as they do not fall under one of the restrictions listed above. In addition, wiring Romex in commercial buildings is allowed if done by a licensed electrician.
Romex cable is designed for physical damage only building applications where overhead power lines cannot be installed due to construction sites, elevated floors/platforms, or where the presence of electricity is undesirable (such as in bathrooms). Romex has no safety features that warn of approaching vehicles or intruders; it is only suitable for temporary use. If you plan to install permanent wiring using Romex, we recommend using armored cable instead. Armored cable is designed for outdoor use where exposure to weather is likely; it can be pulled directly off the shelf at home improvement stores. It can also be used inside when it's time to replace aging wiring or add extra circuits.
The best type of cable to use for your building's wiring needs is dependent on how much current will flow through it. For example, if you need to supply a lot of lights, then you should get cable with larger wires. Otherwise, you won't be able to fit enough wires into it.
Romex is a huge pain to run through conduit. You are not permitted to run Romex along the surface of the wall. Conduit or armored cable can be used (AC or MC). This must be routed through conduit. On completed garage walls, romex cables are not permitted to be exposed. They have to be located inside the wall with some distance between each other.
The National Electrical Code requires that all household wiring be placed in metal conduits. This is for safety reasons. If any part of the wiring becomes damaged, it should be removed from the circuit immediately. This prevents electrical shocks and fires from happening. The metal conduits provide extra protection against electrical surges too. Without these protective measures, your house would be at risk of electric shock and fire.
Garage ceilings usually have enough space above them for conduit to be run. The conduit should be run before the ceiling is finished so that any ductwork or other overhead structures do not block its path.
If you want to use romex instead, then it needs to be in two separate circuits. One for electricity and one for telephone lines. These need to be separated at both ends of the garage. Each end of the garage should have a connector box to connect to the respective cables.
Conduit is also required wherever there is likely to be damage to the exterior of the garage wall.
A good rule of thumb is that romex is permitted except in drop ceilings if the walls and roof are built of wood. Ceiling tiles or concrete would make it unacceptable for residential use.
The wiring inside a building is called romex because it was originally installed in open racks called romex boxes. These days, however, most romex runs are enclosed within metal conduit or plastic cable trays. Either type of enclosure can be used to meet local electrical code requirements for clearance between live and dead parts of the wire. The term "ceiling romex" is often used to describe any type of wiring located in the space above a floor-to-ceiling wall. This includes but is not limited to drywall, paneling, taping, and texturing.
People sometimes try to avoid having to deal with questions about their home's wiring by saying that there is no romex in their house. This is not true. Even if your house was built after 1990, there's a good chance that some of the wiring inside it is romex. The wiring in houses this age comes pre-installed by the builder and usually goes straight into the walls from where it will spread out across the ceiling.