The protective ground must be bare, green or green-yellow striped. The smallest branch circuit rating is 15 amperes, used for general purpose receptacles and lighting. It is either bare or has green insulation. If the surface over the buried line is to be removed, supplemental offset markings may be used. Canadian One-Call Centres Committee and the Canadian Common Ground Alliance. A few cities have more restrictive rules and require electrical installations to be done by electricians.
This includes all small appliance circuits in a kitchen, receptacles in a crawl space, basements, bathrooms and a receptacle for the laundry room, as well as outdoor circuits within easy reach of the ground. In addition, the revenue lost for the users due to the downtime could be much higher than the repair cost itself, especially for those high capacity fiber optic cables. Generally, receptacles are fed by 120 V or 208 V in place of 240 V in a house , and can include special current rated outlets for industrial equipment. The foregoing is just a brief overview and must not be used as a substitute for the actual National Electrical Code. Because of the many different types of materials that go into manufacturing each of the different types of underground lines, different detection and location methods must be used. In some jurisdictions all wire colors are specified in legal documents. The recommendations in Table are by Wiles.
The facility color may be added to white flags or stakes. Dig Law Safety Committee If you feel a violation of the state has occurred, you can file a complaint with the Washington Dig Law Safety Committee. Some of these are retained for technical reasons, since the safety of wiring systems depends not only on the wiring code but also on the technical standards for wiring devices, materials, and equipment. The colors adopted as local practice are shown in Table. The most common residential and small commercial service in Canada and the U.
Have you ever seen a parking lot spray painted with various colors on the surface? Other code requirements vary by jurisdiction in the United States. These markings are not related to utility locating. Orange and other colors are used by local authorities to mark improvements and other details not related to utility locations. They will send a locator to mark the approximate location of your underground utilities, following the color codes to the right, so you'll know what's below - and be able to dig safely. This type of insulation is used for both copper and aluminum conductors which are either solid or stranded, depending on size. For more information, see the section below for the. Portable appliances with metal cases also have a bonding conductor in the flexible cable and plug connecting them to the distribution system.
However, other colors have other meanings. Underground utility designating is the process of identifying and marking underground utilities. Failure to call may result in fines, charges for damages, and criminal convictions. Approved wiring types can vary by. Digging anywhere in the state of Washington without calling for a utility locate is against. To increase visibility, color-coded vertical markers temporary stakes or flags should supplement surface marks. The work will be by a designated authority at several stages before permission is obtained to energize the wiring from the local ; the inspector may be an employee of the state or city, or an employee of an electrical supply utility.
The neutral is connected to the center tap of the power company of a system, or the center of the wye connection of a system. Specific exceptions apply, such as a cable running to a switch and back known as a traveler where the white wire will be the hot wire feeding that switch. The committee, created by statutory requirement, is made up of 13 members representing a variety of stakeholders throughout the digging and utility industry. Coleman Government Center 111 N. Unsourced material may be challenged and removed. For other types of pipe, such as plastic or concrete, other types of or modern must be used. Several other types of wiring systems are used for building wiring in the United States; these include corrugated metal , , other types of , and various types of.
Green is used for telecommunication conduits. Please see the following illustrations. Before digging, often require that the underground systems' locations be denoted and approved, if it is to be in the public. The system is based entirely on convention without any written standard. Orange Communication, alarm or signal lines, cables or conduit. The neutral is white, the hot live or active single phase wires are black , and red in the case of a second active.
In some locations, major , national defense communication lines, , rail and road tunnels also compete for space underground. Front Street Columbus, Ohio 43215 Free short-term Parking garage across Long St After-hours Drop Box Available Phone: 614-645-8276 Weekdays 7:30 a. Regulations in each jurisdiction will indicate when a change to an existing installation is so great that it must then be rebuilt to comply with the current electrical code. In actual practice, the neutral terminal is silver colored, the line and load terminals are brass or rarely painted black , and the grounding screw is usually colored green. Different size wires may be used in the same raceway so long as they are all insulated for the maximum voltage of any of these circuits. The circuit return conductor neutral is also connected to ground at the service entrance panel only; no other connections from neutral to ground are allowed, unlike regulations in some other parts of the world. Offset markings should be on a uniform alignment and must clearly indicate that the actual facility is a specific distance away.
Maps Want A Custom Do-It-Yourself Colored United States Map? The tolerance zone includes the width of the facility and 0. Sewer and storm drain mains usually have manholes for access with certain spacings along their routes. Always proceed with caution when digging around utility lines. The width of the tolerance zone may be specified in law or code. Lighting is usually fed by 277 V with exception for special-use lights that use 120 V. In residential construction, branch circuits for higher ratings are usually dedicated to one appliance, for example, fixed cooking appliances, electric clothes dryers, and air conditioners. For power circuits, the color-coding uses the same colors as residential construction, and adds the additional wires used for three-phase systems.