A general rule of thumb and code minimum for residential wiring in the United States is to use no smaller than 12 AWG wire on a 20 A circuit. Install 2 20 amp receptacles on a 30 amp breaker in parallel. If you're wiring a v , amp outlet to run power tools, you can use the same gauge wire you would use for a volt, amp circuit.
Remember that the cable must have an extra hot wire. If the appliance draws 30 amps, you need a different type of receptacle, and the cable needs to be gauge. Type UF cable is the most commonly used nonmetallic cable for residential outdoor wiring runs. UF cable can be direct-buried without conduit with a minimum of 24 inches of earth cover. THHN wire can be used in a conduit but is not rated for direct burial alone. It is used for general building purposes such as residential and commercial wiring.
The National Electric Code recommends and allows it to be used in dry locations only. Burial depth varies based on location and type of conduit. You must have that W in there for it to be rated for wet conditions, which underground conduit is. Since stranded wire is more flexible than solid core wire of equal size, it can be used when the wire needs to move around frequently, in a robot arm for example. Well, that job would've taken 10 minutes in Chicago.
In LA, it meant breaking into the wall. Certainly more than a minute job. From a consumer standpoint, having everything "in-pipe" might be a construction hassle but if you ever need to change anything you'll be glad it's like that. Everything "in-pipe" means that every wall outlet, every overhead light, and every wall switch is connected to each other although perhaps not directly and changing stuff , short of installing a NEW outlet or switch or ceiling fan is a breeze.
Just pull a few new wires. The second bonus, one that is not immediately obvious is the animal-proofing that wiring-in-pipe provides. The first time a squirrel may he rest in peace gnawed thru my Mom's Romex in LA gave her immediate appreciation of that.
And it was also not the last time. And third, everything in-pipe means that there is a ground continuity that is not present automatically in Romex. Yeah, piping a new house or garage is more expensive and time consuming but the first time you need to change something you'll appreciate it. Add to that the safety you get when you don't inadvertently ground-isolate an outlet. Read my post. Just pull a few new wires Just put up a new shop and i did a combination of the romex and thhn.
Then took a Romex to the left and another to the right, running 2 circuits each way. This just saved me running and stapling romex up high in the trusses with my 13' ceilings, and I thought it would be quicker and possibly cheaper. Good luck. You must log in or register to reply here.
Top Bottom. Romex is not allowed in wet locations. The inside of conduit in a wet location is considered a wet location.
Many electric cooking appliances require 40 amps such as electric cooktops. Today's romex should last at least years. Romex wiring is not rated for outdoor use , but can be used in dry and damp areas, including basements.
Romex should not be used in most commercial buildings. For a given wire size , increasing the current increases voltage drop. A general rule of thumb and code minimum for residential wiring in the United States is to use no smaller than 12 AWG wire on a 20 A circuit. Install 2 20 amp receptacles on a 30 amp breaker in parallel. Romex wire is not authorized for use outside of the finished wall system Unless it is protected within an approved conduit.
A wood chase might be OK but the cord cap plug is still troubling. Type UF cable is the most commonly used nonmetallic cable for residential outdoor wiring runs. UF cable can be direct-buried without conduit with a minimum of 24 inches of earth cover. Is Romex wire Thhn? Understanding the differences can help you decide. Its capabilities and features have made it one of the most popular construction wires, and it passes the majority of building codes.
If you need nylon-free wire, one alternative is hook-up wire. You can also reach out to us at WesBell for help finding an appropriate solution. THHN wire is available in many different sizes, and each serves a different purpose. Since THHN wire is so versatile, you may wonder why you would choose other wire types. Here are two other common wire types to consider:. Other advantages include:. As we mentioned above, THHN wire is the most popular in the industry — and that says something.
Some other advantages of THHN wire include the following:. The main disadvantage of working with THHN wire is that it cannot be used outside.
0コメント