The European standard calls for the three line conductors to be colour coded brown, black, and grey respectively. A neutral conductor is colour coded blue.
If single phase - 2 wire service > two wires If single phase - 3 wire service > three wires If three phase - 3 wire service > three wires If three phase - 4 wire service > four wires US residential service is usually single phase 3 wire service: Two hots and neutral.
A single-phase supply needs two wires to allow the current to circulate.
It is an outlet that has one hot wire, such as a household receptacle, or two hot wires, such as a dryer outlet (in the US). If the outlet has three hot wires, it would be called a 3-phase or polyphase outlet. These would normally be found only in an industrial setting.
Yes, many parts of the US use 13.2 kV in primary line distribution systems. That is phase to phase. Phase to ground is 7620 V.
These colour wires are used in European and UK wiring. The blue wire is used to the identify the neutral conductor and the brown wire is used to identify the "hot" conductor.In Canada and the US. The white wire is used to the identify the neutral conductor and the any colour but green is used to identify the "hot" conductor.
In the US: A phase - brown B phase - orange C phase - yellow neutral - gray ground - green or green with a yellow stripe. Note that the ground color is the only one mandated by code. The others are simply industry standard usage.
In North America the only identified colours are White for the neutral conductor and Green for the ground conductor. The conductors for "hot" feeders can be any colour.For three phase feeders in Canada the colours used should be L1 red, L2 black and L3 Blue. In the US L1 black, L2 red and L3 blue.The function of the three coloured wires is to supply the load with a voltage source.
The 'toilet' phase.
In 120/208V 3 phase system you have 5 wires: three hots, one neutral, and one ground. You have 208V between any two hots and 120V between any hot and neutral. The neutral is the same as in a single phase system. Clarification: Only 4 wires maximum come from the pole - 3 phases and a neutral, and then only if the transformers are on the pole. The ground is always locally derived from a ground rod(s) and/or cold water pipe ground. Most of the time, only 3 wires come in from the pole - the 3 phases in a Delta configuration (Delta has no neutral). The neutral is then derived from a local transformer connected in a Delta-Wye setup. The neutral is the center connection in the Wye. So, from the utility feeder to the transformer - 3 wires. From the transformer (wherever it is located) to the building service entrance panel - 4 wires. The ground is connected at the service entrance panel, and from there to the rest of the building you would have all 5 wires. Clear? In the US, 208/120 is a standardized mains voltage, but in some parts of the world, the phase-to-phase voltage is 220. In that case, the phase-to-neutral potential (in a 3-phase system) would be 127 Volts, not 120.
It depends in which country you live, as the colours depend upon national or international standards. In the UK, for example, the colours were red, yellow, and blue. These days, in order to integrate with EU requirements, those colours are being replaced with brown, black and grey.In Canada the phase colours are Red, Black and Blue.In the US the phase color coding is Black, Red and Blue for 208 volts and Brown, Orange and Yellow for 480 volts.See related links below.
more then 10,000,000 people or more
Your home will have single phase power coming to it.