Answer / madhvaraj

Red, Green and Blue are the three primary colours. These colours are unique and cannot be formed by mixing any other colours. More over they are distinctly visible for identification.As we require a 4th colour for representing neutral, the mixture of red and green, i.e. yellow is taken for representing phase and the green, universally accepted for
safety is representing earth.

Answer / sanjeet swarnakar

in other country in place of RYB other convention is also
used



please tell me ur email ID

Answer / sath

The color coding in a conductor is only for identification
purpose.there is no other technical reason for that.

Answer / prosenjit majumder

I think use of colour coding for three phase system is
only for identification . you can use other colour code
also.

Answer / suni

First- for Identification Purpose
Second- RYB Electrical standard so every common pepole can
identify
third -All motor or other end side device are mention with
RYB only so they maintain the same in phase system

Answer / d4

Red, yellow and blue being the primary colors are used to
represent the three phases and usually black is used for
neutral. There is no specific technical reason.

Answer / meenakshi

to allow for balanced loading and to assure the correct
phase rotation

PLZ REFER TIS LINK FOR MORE DETAILS
http://en.wikipedia.org/wiki/Three-
phase_electric_power#Color_codes

Answer / ajit pal

It is just a convention and nothing else.

Answer / james siruet

RYB is the most common colors used in KSA. For them to simplifies electrical wiring a they can easily determine what is hot/ live or ground..there's no other specific technical reasons.

Answer / raymond johnson

In addition to identification, the color code identifies the phase rotation. If the convention is followed from beginning to end, a three-phase motor will rotate in the correct direction.

single phase voltage 230 and Three phase voltage 450 why 690 voltage

1 Answers   XYZ,

What is the meaning of capacity of a 63 Amps TPN MCB? Is it the per phase capacity or the totol capacity?

1 Answers   Mother Dairy,

how we control automatic generator i'e with to supply (main supply and local generator) when the main supply was break to supply the local supply automatically to begin supplying power.I now this control circuit is the combination of contactor time delay contactor switch and overload relay .but my question is how we combine those component thank you

0 Answers  

defination of static variable compensator

1 Answers  

What is method of calculating the fault current for a MDB, 50KW, 3PH, 415V, 50HZ?

0 Answers   L&T,

In MEP Services what are parts of STP and what are there function?

0 Answers   Tenon,

What is the following which is printed on electrical appratuses like AC21 ,AC 23 , etc ?

1 Answers  

WHAT IS DIFFERENCE BETWEEN PHASE CONVERTER AND VFD

1 Answers  

a room heater is connected in serise with a 100w bulb.if the 100w bulb is replaced by a 40w bulb then the output of the heater is increase/decrease/remain same?

9 Answers   College School Exams Tests,

what is meant by IGBT how they differ from tyristor ?

0 Answers  

What is nyquist contour?

0 Answers  

how to calculate differential current when we testing differential relay..suppose we have 1000kw generator,630amp VCB,what value we should put /inject so that relay trip the VCB? PLLZ justify ur comment

0 Answers