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.....

why electron not flow in open loop,how they know path is open ?

3 Answers  

when the PFR (POWER FACTOR REGULATOR)change a step to zero,one of the RCCB will triped off,is it the changing step of this PFR effect the RCCB?

2 Answers  

What is the gain of 1-s/1=s at 1 rad/sec?

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what happenes if the core of the transformer saturates?

4 Answers  

why the earth pin is thicker than other pins in a plug? If it is for reducing resistance, then why the copper earth wire is not so thick as earth pin of socket?

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32 Answers   L&T, MCL,

What is the theoretical reason for the size of a zig zag grounding transformer to be 1.732 times less than that of a wye-delta grounding transformer used for the same application?

0 Answers  

what is short circuit force ? How to calculate it for Panel?

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What is the diff btw Conventional & Addressable Fire Alarm System???

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How to calculate cable rating for 3 phase supply?

0 Answers  

How many types oil using in transformer ? How many letars using in transformer..?

0 Answers   TATA,

What are the reason of unbalanced secondary voltage of HT transformer 33kv/6.6kv ? Incomming voltage is balanced.33kv each secondary voltage 6.6 kv 6.4 kv 6.4 kv At no load conditions.

1 Answers