BS, IEC colour codes
BS, IEC colour codes
(OP)
Hi,
I'm trying to work out cable colours for a control panel. The colours for AC wiring seems quite well documented, but does anyone know any details for 24VDC wiring?
I've been searching and i'm having trouble trying to find any convention. I think i read that there is a BS for machine colour coding and that states blue for control wiring (going by what people have said, i never read it myself!).
However, would supplies to PLCs etc (+24VDC and 0V) be blue aswell? I'm used to seeing red(+) and black(-), could that be used, or can i use whatever colour i feel like? Heh.
Ross
I'm trying to work out cable colours for a control panel. The colours for AC wiring seems quite well documented, but does anyone know any details for 24VDC wiring?
I've been searching and i'm having trouble trying to find any convention. I think i read that there is a BS for machine colour coding and that states blue for control wiring (going by what people have said, i never read it myself!).
However, would supplies to PLCs etc (+24VDC and 0V) be blue aswell? I'm used to seeing red(+) and black(-), could that be used, or can i use whatever colour i feel like? Heh.
Ross






RE: BS, IEC colour codes
Our wiring technician is begging me to let him use a colour other than blue for control wire, but until i find out blue he shall use!
RE: BS, IEC colour codes
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If it is broken, fix it. If it isn't broken, I'll soon fix that.
RE: BS, IEC colour codes
24V DC - grey
110V AC or DC - black
415/240V AC - red / yelllow / blue / black in the good old days
415/240V AC - brown / black / grey / blue - post-EU meddling
Alarms - orange
I.S circuits - mid blue
Other stuff - designer's discretion.
The following might be of use for installation work as opposed to panel wiring: h
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If we learn from our mistakes I'm getting a great education!
RE: BS, IEC colour codes
black -voltage greater than 120vac, tape on both ends for 480vac red, yel, brn for sequence
orange - 120vac power
red - 120vac control signal
white - 120vac neutral
blue or brown - dc power
blue - dc control signal
grey - dc common or neutral
green - equipment ground
yellow - system interlocks
RE: BS, IEC colour codes
208Y/120V power typically is Black-Red-Blue, but not required to be so by code.
480Y/277V power typically is Brown-Orange-Yellow (BOY), but again, not required to be so by code.
RE: BS, IEC colour codes
Thanks again.
RE: BS, IEC colour codes