The electrical box has 2xblack, 2xwhite, 1xred and 1xblue. How do I connect new light fixture with 1xwhire and 1xblack?

I would go White to White and Black to Black.

Use a VOM to test which hot wire is switched. Then connect it to the light black and white to white. Blue is a bit strange in a supply box.

Are you located here in the U.S.A.

The wiring you are describing suggests that you are in Europe.

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Originally Posted by donf

Are you located here in the U.S.A.

The wiring you are describing suggests that you are in Europe.

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More than likely. He said he only had a black and white on his fixture he is going to hook up.

The presence of the Red and Blue conductors is what is troubling me, particularly if this is a residence.

I can understand the presence of a red conductor if a switch-loop is involved, but the blue needs to be explained.

Quote:

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Originally Posted by donf

The presence of the Red and Blue conductors is what is troubling me, particularly if this is a residence.

I can understand the presence of a red conductor if a switch-loop is involved, but the blue needs to be explained.

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Most newer house rooms are wired with a 3 wire circuit circuit through 2 switches so you can hook up a fan with a light and fan circuit. Our house, 8 years old, has a double switch in every BR and the LR. White, black, red. Blue is the confusing factor unless someone added another wire for a separate fan light which is usually blue.

It would really help if the OP would respond and let us know what is actually there.

Was there a fixture there before?
Hook up the new one the same way.