Wiring Color Code

[Husam-89]

Hello Guys,

I would like to ask about the color code of the control wiring in the LV panel boards AS IEC standard 

for the following : 

- 24VAC L / N

- 24VDC + / -

I'd be grateful if you could provide me with the reference 

Thanks & BR

Husam   

[RHH · Accepted solution]

Dear Husam-89,

We have a workplace handbook for these to set standards for this matter.
However as far as I know there are no regulated/regulation standards for control current wire colours (NL) in panel building and you can use any color as long as its determined and acknowledged to anyone that uses it. The following is determined in our handbook:

Control current up to 48 Vac~ ;  phase (L) / switch        RED
                                                     zero (N)                       ORANGE
Control current up to 48 Vdc- ;   Plus (+) / switch           WHITE
                                                     Minus (-)                      GREY

Hope this is of any help to you.

[Gregoire_Brun · Accepted solution]

Hi @Husam-89 

To complete @RHH answer, on product side, we use colors on accessories wiring but it don't have any signification and it's related to any IEC standard.

[John-Welch · Accepted solution]

No real standards for control wiring, but keep away from red, white and blue (3 phase LV wiring colours) black (neutral) and green or green/yellow (earths).  Orange, purple and grey are common control and ELV colours.