Red-Yellow-Blue Color

[Cookie]

What type of wire colors do you guys see in UK air conditioning units and appliances? I'm seeing a rise of Red-Yellow-Blue phase sequencing internal to modern equipment.

 

[R-fur]

The international electrotechnical commission standardised on Blue for neutral. The UK decided on Brown, black, gray for phases. So red yellow blue should not be used as phase colours.

 

[Cookie]

And what happens when you don't follow the IEC's standards

 

[Pete999]

The international electrotechnical commission standardised on Blue for neutral. The UK decided on Brown, black, gray for phases. So red yellow blue should not be used as phase colours.

Yeah but the OP aint in the UK is he ?????

 

[R-fur]

No but he asked what we see in the UK. I dont think Red Yellow Blue is a US standard either.

 

[Moley]

Red - Yellow - Blue is still extremely common phase colours in the UK. We may have gone over to Brown - Black - Grey but nearly everywhere I work is still RYB and still being fitted.

 

[freddo]

A lot of equipment internal wiring is often just all black.

 

[davesparks]

What type of wire colors do you guys see in UK air conditioning units and appliances? I'm seeing a rise of Red-Yellow-Blue phase sequencing internal to modern equipment.

The UK used to use those colours but now we use brown, black, grey for phase colours.

Control panels will generally be black for AC power (identified at each end for phases) light blue for neutral, dark blue for DC control and red for AC control.

 

[Megawatt]

Yeah but the OP aint in the UK is he ?????

Pete999 the flag is the US but cookie I’m pretty sure is in the UK

 

[Pete999]

Pete999 the flag is the US but cookie I’m pretty sure is in the UK

Needs to get it sorted to avoid confusion the doesn't he?

 

[Megawatt]

Needs to get it sorted to avoid confusion the doesn't he?

Yes I agree but all we can do is ask
[automerge]1575317661[/automerge]

No but he asked what we see in the UK. I dont think Red Yellow Blue is a US standard either.

R-fur no that is not US colors either. Our 480vac 3 phase is brown orange yellow, our 3 phase is 208vac is black white red and blue

 

[Cookie]

No but he asked what we see in the UK. I dont think Red Yellow Blue is a US standard either.

Its not "standard" in the US. However, code does not care about wire color for the most part. As long as neutral is white or grey and the ground is green, green/yellow or bare then the NEC happy.

I say mostly because there are a few exceptions like isolated power systems in hospitals where they want brown and orange, ect.

Red - Yellow - Blue is still extremely common phase colours in the UK. We may have gone over to Brown - Black - Grey but nearly everywhere I work is still RYB and still being fitted.

Good to hear its still being fitted!

A lot of equipment internal wiring is often just all black.

Black- that is interesting. I know in substation relay control wiring its often all grey with just number tags.

The UK used to use those colours but now we use brown, black, grey for phase colours.

Control panels will generally be black for AC power (identified at each end for phases) light blue for neutral, dark blue for DC control and red for AC control.

Bad idea if you ask me. Switzerland actually had it closer with Black, White, Red for phase and blue to neutral. I think way back when I think it was yellow with a red twirl. But all this is second hand information and research.

Pete999 the flag is the US but cookie I’m pretty sure is in the UK

The AC unit in question is a US unit. And if it helps my schuko is 60Hz Go 60Hz!

 

[freddo]

Another point to note is USA domestic AC, Boilers etc. are much more industrial and use a lot more standard parts making repairs and fault finding much easier than stuff in the UK. UK stuff often uses small non-interchangeable, manufacturer and model specific parts. This is a pain as it means a lot of waiting for parts to be special ordered in, as wholesalers can't possibly stock everything. It also means there isn't much point a repair engineer stocking much on the van.

 

[Cookie]

Yes I agree but all we can do is ask
[automerge]1575317661[/automerge]


R-fur no that is not US colors either. Our 480vac 3 phase is brown orange yellow, our 3 phase is 208vac is black white red and blue

Yes, but remember its not mandated by code. Only that systems of different voltages in the same building be distinguishable from one another.

 

[Megawatt]

A lot of equipment internal wiring is often just all black.

Fre

A lot of equipment internal wiring is often just all black.

Freddie our equipment and machinery control wiring is red but your not required to have certain colors in controls