AC power color coding in Japan?

Google knows....

jak

I did a lot of googling before posting here. If you would let me know what search criteria you used to find the answer I would be much obliged.....

Well, hush my mouth! You're right in that the particular colors you've encountered, do not fit anybody's standard. The Japanese (now, at least), use the American standard of Black (hot), White (neutral) and Green (ground or earth). One reference noted the hot might be Red or Blue instead of Black; but nothing matches your scheme.

I think the only obvious answer (without a schematic) would be to crack open that instrument and trace it out. FWIW, the ground will be connected to the equipment case and the hot will likely be the switched line.

jak

Bugger me! surely you would grab a meter and check it out anyway ??

Rheilly P

Ground should be connected to the equipment casing. Live should go to the mains fuse and mains switch.

With the mains switch on, you should be able to read the low resistance mains transformer primary coil between live and neutral.

Gareth.

What kind of Japanese equipment has a 3 prong connection on it? They don't use the same 3 connector NEMA connector we use in America they use the older

2 prong connector that was used in the USA in the 1960's. The only thing I saw in japan with a ground was a washing machine and it had a seperate wire that had to be attached to a screw on the outlet.

Mike

I don't know, not having been to Japan or dealt with any original spec Japanese gear. The sources I googled spec normal IEC connectors on equipment end--with grounded Edison (NEMA) plugs on the other--and make no distinction between US and Japanese standards in color or configuration.

I can pull them up again if you care to look--or google....

jak

It's a mag-lev turbo pump controller. The cord is intended to go into a separate Japanese power supply which is connected to a 3-phase, 60A rack of things I don't want to use.