- For uses of the term ground or earth in electricity but outside of mains wiring please see ground (electricity)
Ground or earth in a mains (AC housewiring power) electrical wiring system is a conductor house wiring that exists primarily to help protect against faults and which in normal operation does not carry current.
The term "ground" wiring a house is used in Canada and house wiring diagrams the U.S.; the term "earth" is used in most of the basic house wiring rest of the English-speaking world. They are used synonymously here.
Neutral is a circuit conductor that carries current in normal wiring an old block house operation, and which is connected to earth.
- In a polyphase or three-wire AC system, the neutral conductor is intended typical house wiring to have similar voltages to each of the other circuit conductors, and similar house electrical wiring phase spacing. By this house trailer wiring definition, a circuit must have at least three wires for one to serve as a neutral.
- In the house wiring diagram electrical trade, the conductor of a 2-wire circuit that is connected to the main house electrical panel wiring supply neutral point is also referred to as the "neutral". This is formally described house main panel wiring in the US and Canadian electrical codes as the "identified" circuit conductor. If the entire system is only wiring house single phase then the current carrying conductor house wiring simplified that is tied to earth is still a neutral by this definition.
The NEC and Canadian electrical code french house wiring only define neutral as the how to estimate house wiring first of these. In North American use, the second definition is wiring tv new house used in less formal language but not in official specifications. In the UK the IEE definition is a conductor connected to the aluminum house wiring supply system neutral point, which includes both these uses.
- 1 Earthing basic house wiring diagrams systems
- 2 How electrical wiring house the earth protects
- 3 Equipotential bonding
- 4 Combining neutral with earth
- 5 References
- 6 External where can i find a free wiring diagram for wiring a house links
The names for the following methods of earthing are those defined house wiring ebook by IEC standards, which are used in Europe wiring double switch house and many other regions. For a more detailed explanation, see earthing systems. Different terminology is used in North America, but easy house wiring the basic principles should be the same everywhere.
Since the neutral electrical house wiring point of a supply house air conditioner wiring diagram system is often connected to earth ground, neutral and earth are closely related. Various measures are used to minimize the voltage difference between neutral and house wiring lighting diagram uk local earth ground. residental house wiring In some systems, the neutral and earth join together at the service intake (TN-C-S); in others, they run completely separately back whole house wiring to the transformer neutral terminal (TN-S), and in others they are wiring a house light kept completely separate with the house earth having its own rod and advanced wiring of an old house the neutral being rodded down to earth within the distribution network (TT). home automation whole house wiring In a few cases, they are combined in house wiring (TN-C), but the dangers of broken neutrals (see house insulating around wiring below) and the cost of the special cables needed to house wiring airconditioner heater mitigate this mean that it is rarely done nowadays.
In the USA, the cases of some ovens and clothes house wiring color dryers were grounded through their neutral wires, as main house electrical panel gfci wiring a measure to conserve copper during the Second World War. This smart house wiring practice was removed from the NEC in the southern electric free house wiring check 1996 edition, but existing installations may still allow the case ground of such appliances to be connected to the neutral conductor. Note that the NEC whole house voip wiring may be amended by local regulations in each state and city. This wiring house for cable change to the NEC was implemented because ovens and wiring house for direct tv dryers have components that consume either 120 or 240 volts depending on settings, and thus there wiring new lights in a old house is often current on the neutral wire. 110 house wiring This differs from the protective earth, which only carries current under fault conditions. doll house wiring A case bonded to neutral is generally safe ghost circuits house wiring because the heavier wire that feeds high-power appliances is less likely to break.
How the earth protects
In a home automation and electrical whole house wiring system with a grounded (earthed) neutral, bonding all home automation electrical house wiring arizona non-current-carrying metallic parts of equipment to earth ground, will ensure that current due to faults of the insulation will be diverted house electrical wiring diagrams to earth. In a TN system where there is a direct house wiring code connection from the installation earth to the transformer neutral, earthing will allow the branch circuit protection (a fuse or house wiring diagram lighting circut circuit breaker) to detect the fault rapidly house wiring protection and interrupt the circuit.
In the case of house wiring systems a TT system where the impedance is high due to the lack of direct connection to the transformer neutral an RCD (Residual-Current residential house wiring closets Device, sometimes known as a Residual Current Circuit Breaker) must be used to provide disconnection. RCDs residential house wiring upgrades rules for wiring your house are also used in other situations where rapid disconnection of small earth faults (including a human touching a wall outlet house wiring television antenna live wire by accident, or damage) is desired.
Equipotential bonding involves joining together metalwork that is or may be earthed so that it is at the same potential to prevent shock wiring digital cable for house from between those pieces of metal as the earth wiring house ceiling fan diagram system handles a fault.
In the UK, equipotential bonding is done from the consumer unit (also known wiring house for technology as fuse box, breaker box and distribution board) to wiring house lights incoming water and gas services. It is also 110, 220 house wiring done in bathrooms where all exposed metal that leaves the bathroom including metal pipes and basic electrical house wiring the earths of electrical circuits must be bonded together to ensure that they do it yourself elect wiring house are always at the same potential. Isolated metal objects including metal fittings fed by plastic pipe (water in a electrical wiring for house thin pipe is actually a very estimating electrical wiring for a house poor conductor) are not required to be bonded.
In Australia, a house's earth cables must be connected both to an earthing stake driven into free house wiring check the ground and house insurance aluminum wiring also to the plumbing.
Exact rules for this will vary by country.
Special measures may be house wiring and diy required in barns used for milking dairy cattle. Very small differential voltages, not usually perceptible to humans, may cause low milk yield, house wiring colors or house wiring colours even mastitis. So-called "tingle voltage filters" may be required in the electrical distribution system for a milking parlour.
Combining neutral with earth
A neutral is house wiring curriculum high school no longer permitted to be used as a case ground house wiring diagrams nz for equipment downstream of the service entrance switch in North house wiring help American electrical wiring codes.
Combining the ground and the neutral (grounding to house wiring problems the neutral) provides some protection against live shorts to the case, but will produce a dangerous live case house wiring runs if the neutral connection is broken.
Combined neutral and earths are commonly used in electricity supply house wiring specs. companies' wiring and occasionally for fixed wiring in house wiring supplies buildings and for some specialist applications where there is little choice like house wiring symbols railways and trams. Since normal circuit currents in the neutral conductor can lead house wiring trouble--shooting to objectionable or dangerous differences between local earth potential and the neutral and house wiring troubleshooting to protect against neutral breakages, special precautions information wiring tv new house such as frequent rodding down to earth, use of cables where the combined neutral and earth completely surrounds the phase junction boxes in house wiring core(s) and thicker than normal equipotential bonding must be use of junction boxes in house wiring considered to ensure the system is safe.
In North wiring a us house for european power American practice small portable equipment connected by a cord set may have only two conductors in the attachment plug. A wiring electric in my house polarised plug is used to maintain the identity of the neutral conductor into the wiring house with cat5 appliance but it is never 125 volt wiring house used as a case ground. However, in the past, some large white goods appliances did use a combined neutral 240 house wiring and earth supplied via a NEMA 10-30 or 10-50 240 vac house wiring pricing + 6/3 awg aluminum plug but this is no longer accepted; a separate ground is now required.
 Rick Gilmour et. al, editor, Canadian Electrical 240vac house wiring pricing + 6/3 awg aluminum Code Part aqua chalet house boat floor plan wiring diagram I, Nineteenth Edition, C22.1-02 Safety Standard for Electrical Installations, Canadian Standards Association, Toronto, Ontario Canada (2002) ISBN 1-55324-600-X
 NFPA 70, basic house electricial wiring National Electrical Code 2002, National Fire Protection canadian house wiring Association, Inc., Quincy, Massachusetts USA, (2002). no ISBN
 IEE Wiring Regulations Regulations for Electrical Installations Fifteenth Edition cell phone house wiring 1981, The Institution of Electrical Engineers, (1981) Hitchin, Herts. container house wiring United Kingdom
Wikibooks has more about this dell house wiring in nc subject:
Guide to electrical equipment for travellers
- http://www.iee.org/Publish/WireRegs/EarthingPlasticPipes.pdf document from Paul Cook of diy house wiring the IEE talking about why bonding metal accessories fed by plastic pipes is a dsl house wiring cat-5 bad idea.
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Category: electric house wiring Electrical safety