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The older NZI plug in MCB's at least are colour coded.

White 6 amps
Grey 10 amps
Blue 15 amps
Yellow 20 amps
Black 27 amps
Red 30 / 32 amps

That's the same color code as used here, with the exception of 27A, which I've never seen before. Is that a peculiarly Aus/NZ rating? [Linked Image]

In fact white 5A, blue 15A, yellow 20A, and red 30A goes back to the old BS1361 cartridge fuses as well.

Some systems have changed over time though. Our BS1362 fuses (the 1-inch long types used in BS1363 13-amp plugs) are such an example. Today, the 3A fuse is color-coded red, but in the original system 3A was blue.




[This message has been edited by pauluk (edited 01-03-2006).]