Help to wire washing machine cables into wall motor protection switch

Lucien Nunes said:

This is a 3-phase circuit so there are three line wires L1, L2 and L3; one neutral and the protective earth / ground. The colours follow the Swiss code that was used between 1970 and 1980.

L1: Black
L2: Red
L3: White
N: Yellow
PE: Green/Yellow

If your washing machine has a 3-core cable it is single-phase. You can use any of the three available phases L1, L2 or L3 to power it. These correspond to the switch outputs T1, T2 or T3.

Therefore:
Phase (Brown) > T1 (Black) or T2 (Red) or T3 (White)
Neutral (Blue) > Neutral (Yellow)
Earth (Grn/Yel) > Earth (Grn/Yel)

Three points to note.

Make sure the circuit is designed for the full load current of your machines. If the previous machine was 3-phase the load might have been spread across the 3 phases. E.g. old machine 3x 6A, new machine 1x 16A. Check the fuses / circuit breaker.

Related: It is probably best to connect the two machines onto two different phases so that the combined load is not drawn from one phase of the house supply. You might like to look at the way the other circuits in the house are allocated to the three phases and avoid the circuit with the highest load. This is often L1, in which case put one machine onto T2 and the other T3.

Voltage between any two lines is 400V, between line and neutral or earth is 230V

Die alten Kabelfarben sehen für mich nett aus, ebenso die Beschreibungen, wenn sie auf Deutsch sind. Außenleiter. Schutzleiter. J'aurais dû écrire tout ça en allemand, o forse francese o romancio, as I don't know where in Switzerland you are. Romansh is all Greek to me though.

Click to expand...

Lucien Nunes said:

This is a 3-phase circuit so there are three line wires L1, L2 and L3; one neutral and the protective earth / ground. The colours follow the Swiss code that was used between 1970 and 1980.

L1: Black
L2: Red
L3: White
N: Yellow
PE: Green/Yellow

If your washing machine has a 3-core cable it is single-phase. You can use any of the three available phases L1, L2 or L3 to power it. These correspond to the switch outputs T1, T2 or T3.

Therefore:
Phase (Brown) > T1 (Black) or T2 (Red) or T3 (White)
Neutral (Blue) > Neutral (Yellow)
Earth (Grn/Yel) > Earth (Grn/Yel)

Three points to note.

Make sure the circuit is designed for the full load current of your machines. If the previous machine was 3-phase the load might have been spread across the 3 phases. E.g. old machine 3x 6A, new machine 1x 16A. Check the fuses / circuit breaker.

Related: It is probably best to connect the two machines onto two different phases so that the combined load is not drawn from one phase of the house supply. You might like to look at the way the other circuits in the house are allocated to the three phases and avoid the circuit with the highest load. This is often L1, in which case put one machine onto T2 and the other T3.

Voltage between any two lines is 400V, between line and neutral or earth is 230V

Die alten Kabelfarben sehen für mich nett aus, ebenso die Beschreibungen, wenn sie auf Deutsch sind. Außenleiter. Schutzleiter. J'aurais dû écrire tout ça en allemand, o forse francese o romancio, as I don't know where in Switzerland you are. Romansh is all Greek to me though.

Click to expand...

Lucien Nunes said:

This is a 3-phase circuit so there are three line wires L1, L2 and L3; one neutral and the protective earth / ground. The colours follow the Swiss code that was used between 1970 and 1980.

L1: Black
L2: Red
L3: White
N: Yellow
PE: Green/Yellow

If your washing machine has a 3-core cable it is single-phase. You can use any of the three available phases L1, L2 or L3 to power it. These correspond to the switch outputs T1, T2 or T3.

Therefore:
Phase (Brown) > T1 (Black) or T2 (Red) or T3 (White)
Neutral (Blue) > Neutral (Yellow)
Earth (Grn/Yel) > Earth (Grn/Yel)

Three points to note.

Make sure the circuit is designed for the full load current of your machines. If the previous machine was 3-phase the load might have been spread across the 3 phases. E.g. old machine 3x 6A, new machine 1x 16A. Check the fuses / circuit breaker.

Related: It is probably best to connect the two machines onto two different phases so that the combined load is not drawn from one phase of the house supply. You might like to look at the way the other circuits in the house are allocated to the three phases and avoid the circuit with the highest load. This is often L1, in which case put one machine onto T2 and the other T3.

Voltage between any two lines is 400V, between line and neutral or earth is 230V

Die alten Kabelfarben sehen für mich nett aus, ebenso die Beschreibungen, wenn sie auf Deutsch sind. Außenleiter. Schutzleiter. J'aurais dû écrire tout ça en allemand, o forse francese o romancio, as I don't know where in Switzerland you are. Romansh is all Greek to me though.

Click to expand...

I think most of the lines are on the black, like lamps etc. I never saw a white or red anywhere else,

Click to expand...

Lucien Nunes said:

In single-phase circuits the unswitched line will be black regardless of which phase it is derived from. Only in 3-phase circuits do the white and red identification colours come into use. Therefore the presence of black wires throughout your installation is no indication of how the load is spread between the supply phases.

Click to expand...