Selectronic Rcore Transformers

[RCruz]

I am now building a PSU with R-Cores from Selectronic... these are quite good sounding devices.

Does anyone have any experience with them ?

These come with primary wires coloured in White and Black.... which colour should I use to connect to live and neutral ?

[kevinkr]

Post moved to more appropriate venue.

[qusp]

I would expect white for hot, are they not marked at all with this info?

[kevinkr]

This is the U.S./North America electrical color code:

White - Neutral
Black - Hot

Check U.S. NEC to confirm. (If you are not convinced)

Note for 240V operation with dual primaries in series connect white of one to black of other.

[Salas]

Originally Posted by qusp

I would expect white for hot, are they not marked at all with this info?

One that I have in hand is marked as: 230V White/Black 15V Violet/Gray 15V Blue/Red. I have it configured as single 30V secondary with Gray & Blue tied together. They usually give 10% more secondary voltage than printed spec when not very heavily loaded on most European wall sockets. Primary side I use White for hot, Black for neutral, and Yellow for mains earth. Yellow is marked as ''Ecran electro-statique'' i.e. Ground electrostatic screen. They are custom made for the French vendor by SHILCHAR India as trained and jigged by the Japanese originally. You can see the SHILCHAR factory logo molded on the plastic bobbin former rings under a light varnish coating layer.

[merlin el mago]

Good to know white is hot & black is neutral, thanks for the info Salas.

[qusp]

Originally Posted by kevinkr

This is the U.S./North America electrical color code:

White - Neutral
Black - Hot

Check U.S. NEC to confirm. (If you are not convinced)

Note for 240V operation with dual primaries in series connect white of one to black of other.

i'm aware of the codes, but no, i'm not convinced the EU transformers will follow the US codes, as confirmed by Salas

[qusp]

Originally Posted by Salas

One that I have in hand is marked as: 230V White/Black 15V Violet/Gray 15V Blue/Red. I have it configured as single 30V secondary with Gray & Blue tied together. They usually give 10% more secondary voltage than printed spec when not very heavily loaded on most European wall sockets. Primary side I use White for hot, Black for neutral, and Yellow for mains earth. Yellow is marked as ''Ecran electro-statique'' i.e. Ground electrostatic screen. They are custom made for the French vendor by SHILCHAR India as trained and jigged by the Japanese originally. You can see the SHILCHAR factory logo molded on the plastic bobbin former rings under a light varnish coating layer.

thanks for the confirmation Salas, i'm buying some of the tiny PCB mount ones from Selectronic for my dac at the moment, but havent got any in hand yet

[merlin el mago]

Originally Posted by kevinkr

BACKWARDS!

YES!!!!!!!!!!!

[kevinkr]

Originally Posted by qusp

i'm aware of the codes, but no, i'm not convinced the EU transformers will follow the US codes, as confirmed by Salas

Then they don't follow anyone's codes then, EU requires EU color codes which are Blue, Brown, and green/yellow stripe.

Black and White conductor color do have specific meanings for North American markets.

What sort of approval do these parts carry? None?