Discuss Red-Yellow-Blue Color in the UK Electrical Forum area at ElectriciansForums.net
Yeah but the OP aint in the UK is he ?????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.
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.
Pete999 the flag is the US but cookie I’m pretty sure is in the UKYeah but the OP aint in the UK is he ?????
Needs to get it sorted to avoid confusion the doesn't he?Pete999 the flag is the US but cookie I’m pretty sure is in the UK
Yes I agree but all we can do is askNeeds to get it sorted to avoid confusion the doesn't he?
No but he asked what we see in the UK. I dont think Red Yellow Blue is a US standard either.
No but he asked what we see in the UK. I dont think Red Yellow Blue is a US standard either.
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.
A lot of equipment internal wiring is often just all black.
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.
Pete999 the flag is the US but cookie I’m pretty sure is in the UK
Yes I agree but all we can do is ask
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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
FreA 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 controlsA lot of equipment internal wiring is often just all black.
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.
The US does care about colors. Up to # 8 you have to use brown, orange, yellow on 480vac 3 phase and any wire bigger than # 8 you are allowed to phase tape them. Let me ask you something, can you install 120vac and 277 vac in the same raceway exceptions includedIts 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.
Good to hear its still being fitted!
Black- that is interesting. I know in substation relay control wiring its often all grey with just number tags.
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.
The AC unit in question is a US unit. And if it helps my schuko is 60Hz Go 60Hz!
The only way you can mix 120vac and 277vac in the same raceway is to use white for the 120vac neutral and gray with a tracer on it and the tracer can be any color except green for the 277vac neutral. Over time the gray will start losing its color and the you can’t tell which neutral is for your 120vac or 277vac. It’s not a good idea to mix voltages in the same raceway and if you do they all have to be the same insulationIn that regard yes- but what stops me from having Yellow-Purple-Pink-Gray on 120/208Y? Nothing that I know of.
277/480 and 120/208 can share the same conduit if the 120/208 conductors have insulation rated for at least 480 volts. Considering THHN/THWN is typically 600 volts rated you are ok.
Exceptions off the top of my head are life safety circuits- as they can not mix with normal power circuits- but that applies to all voltages. Same for service conductors and branch conductors but that still holds true for all voltages.
You also cannot use gray for a neutral for 120vacIn that regard yes- but what stops me from having Yellow-Purple-Pink-Gray on 120/208Y? Nothing that I know of.
277/480 and 120/208 can share the same conduit if the 120/208 conductors have insulation rated for at least 480 volts. Considering THHN/THWN is typically 600 volts rated you are ok.
Exceptions off the top of my head are life safety circuits- as they can not mix with normal power circuits- but that applies to all voltages. Same for service conductors and branch conductors but that still holds true for all voltages.
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