Answer / abulfaiz

THEY ARE THE INTERNATIONAL STANDARD COLORS FOR THE
THREE PHASE SYSTEM. MAY BE IF WE SET SOME OTHER THREE
COLORS SUCH AS WHITE BLACK & GREY MEANS THEN THE SAME
QUESTION ARISES.....
WHY WHITE BLACK AND GREY???:)

Answer / ravichand n

its universal colour code for 3-phases

Red-R phase
Yellow-Y phase
Blue- B phase
black - neutral
green- earth

Answer / pawan singh chauhan

AC three phase system colors {red,yellow,blue + green for earth} based on IEC(International Electrotechnical Commission)and NEC(The National Electricity Code)
because these colors are universal in india & easily detected if cables are heated

For DC system wire colors { Brown,White,Grey,orange} also based on IEC(International Electrotechnical Commission)and NEC(The National Electricity Code)

Answer / rupinder singh

Red,Yellow and Blue are basic colors,and in 3 phase system we required to differentiate between the 3 phases while seeing them so they were selected.

Answer / suhail

Those are standard colours

Answer / *avi

Because they are easily distiguishable. And Used as
international standard colors.

Answer / dinesh

those are standards which are following every where....in
electrical

Answer / nishanth

This three coloursvare international standard..
And these three colors are the main colors..
To mix the colors u will get white and all colours..

Answer / bharat b wankhade

Intensity is more and easily differential according to indian atmosphere.....

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