In low-voltage networks, which distribute the electric power to the widest class of end users, the main concern for design of earthing systems is safety of consumers who use the electric appliances and their protection against electric shocks. Example purposes include electromagnetic interference (EMI) filtering in an EMI filter, and the use of the Earth as a return path in a single-wire earth return distribution system. Functional earthing įunctional earthing serves a purpose other than electrical safety. When current flows from a line conductor to an earth wire, as is the case when a line conductor makes contact with an earthed surface in a Class I appliance, an automatic disconnection of supply (ADS) device such as a circuit breaker or a RCD will automatically open the circuit to clear the fault. This type of earthing is not an earth connection, technically speaking. Its main purpose is to prevent equipment damage and the risk of an electric shock. Equipment earthing Įquipment earthing serves a purpose of electrical safety in an electrical fault. Having Earth as a common reference point also keeps the electrical system's potential difference limited to the supply voltage. System earthing also allows for equipotential bonding to all metalworks to prevent potential differences between them. In the event of a surge, a lightning arrester, a surge arrester or a SPD will divert the excess current to the Earth before it reaches an appliance.
Static buildup, as induced by friction for example, such as when wind blows onto a radio mast, is dissipated to the Earth. Its main purpose is to prevent static buildup and to protect against power surges caused by nearby lightning strikes or switching. System earthing serves a purpose of electrical safety throughout the system that is not caused by an electrical fault. There are three main purposes for earthing: Radio antennas may require particular grounding for operation, as well as to control static electricity and provide lightning protection. Telegraph lines may use the Earth as one conductor of a circuit, saving the cost of installation of a return wire over a long circuit. Tall structures may have lightning rods as part of a system to protect them from lightning strikes. In addition to electric power systems, other systems may require grounding for safety or function. Regulations may identify special cases for earthing in mines, in patient care areas, or in hazardous areas of industrial plants. Regulations for earthing systems vary among countries, though most follow the recommendations of the International Electrotechnical Commission (IEC). The choice of earthing system can affect the safety and electromagnetic compatibility of the installation. 100/box bulk.An earthing system (UK and IEC) or grounding system (US) connects specific parts of an electric power system with the ground, typically the Earth's conductive surface, for safety and functional purposes. UL-listed for direct bury and rated for 600V.
Consists of a 3M Spring Connector R/Y and a high impact, UV-resistant tube prefilled with moisture-resistant grease. 3M Direct Bury Splice Bulk DBR/Y-6 is a premium moisture-resistant connector that is used to electrically connect and moisture seal thicker insulation wire. Premium moisture-resistant connector that is used to electrically connect and moisture seal thicker insulation wire. It is suitable for water-intensive applications such as golf courses, irrigation controls and outdoor lighting. The flame-retardant kit seals the wiring that is rated up to 600V.
#Direct bury wire connectors series
3M Direct Bury Splice Kit DBR/Y-6(BULK), 18-10 AWG, 100 per caseģM DBR/Y-6 Series Direct Bury Splice Kit electrically connects 2 or more pre-stripped copper wires and moisture seals the connection for direct-burial applications.
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