What Does an Orange Wire Do in an Electrical Control Panel?


This video is a little different, as we’re going to look at
something that features everywhere inside the control panel but holds a special function that separates it from
the rest of its brothers. We are going to be looking at the
orange wire inside of the panel, WHY it is special, and what we use it for. Now you may be asking how can
an orange wire be special? Well, it does not exactly have
superpowers, but inside our panel, it holds a secret that
we’re going to find out! But before all of that,
please don’t forget to like this video if you find it useful. We want to continue to bring
you new and exciting videos to further your learning, and this gives us the
motivation to come up with more exciting and easy to
follow videos in the future. Within the panel,
we have a number or orange-colored wires. You may wonder what these are for, as we’ve already heard of the blue
and white wires connected to the PLC. Well, what these wires are for
is to give power to devices when the main switch or panel
isolator is in the OFF position. “Why would we want to keep things
on when we’ve turned the power off?” I hear you ask! “Isn’t that dangerous?” Well to put it simply, NO! If we try to understand the
different colored wires in a panel, this will help us to understand
why those that are colored orange are suitable to work even
when the main switch is off. The colors of wires in
panels are required by law to follow the machine
safety standard EN 60204-1. This is so that there are
consistency and for safety. In Power Circuits, AC and DC,
we have this color-coding; AC Phase will be BLACK AC Neutral will be LIGHT BLUE DC+ will be BLACK and Earth will be GREEN YELLOW In Control Circuits, AC and DC,
we have this color-coding; AC live will be RED AC Neutral via transformer will be RED AC Neutral (mains) will be LIGHT BLUE and DC+ will be BLUE Interlocks and circuits supplied
from remote panels will be ORANGE; in this case, not the one we’re after! Finally Earth will be GREEN YELLOW Panel services are 240VAC supplies
for panel internal lighting, programming console socket outlet, internal heating & cooling, CPUs (memory backup purposes), etc. These are ‘excepted circuits’ as defined in EN 60204-1 and as such are not disconnected
by the main panel isolator but by a separate isolator mounted inside the panel and designated ‘maintained supply’. The color-coding for
multicore cables is like this; The sheath will be ORANGE AC live cores will be ORANGE AC neutral cores will be ORANGE and Earth cores will be GREEN YELLOW The color-coding for
single-core cables is like this; AC live will be ORANGE AC neutral will be LIGHT BLUE and Earth will be GREEN YELLOW So we come back to the original question; What wires in our panel are orange? Well, firstly we have
the panel internal light. We want to be able to see when
we turn the main switch off! Next, we have the socket. This will allow us to keep
our laptop charged up. If the panel needs to be turned
off for an extended period of time, then when we are ready to
go, our laptop may have died. Not good! The socket is protected by a fuse so that any spikes in power
won’t damage our laptop! The final thing we have
in this panel with power is a topic we’ve already covered; the thermostat and cooling fan! As we’ve already determined,
we need to be able to keep the panel cool, even when the main switch is off. So how does this all work? Well inside the panel,
we have the mains feed 3 phase power that comes into the panel to a set of
terminals labeled L1, L2, L3, and N. You can see from this that 1 phase, L1/N, has orange wires in it. It is separate from the other
wires in this terminal block so that they act independently. On the back of the main
switch on the left-hand door, the wires are identified as L1, L2, L3, and N, matching what we have on the terminals. The outgoing side of this main switch
will be isolated if the switch is off, and will be powered if the switch is on. The main switch is connected to
the contactor labeled “150K1”. When the switch is on,
giving power to the panel, this contactor will be
“pulled in” or “energized”. Once this is energized, power can be
distributed around the rest of the panel. That was intense! Hopefully,
you’ve learned the orange wires secret. It’s important to remember this one.
It could save your life! Now you’ve learned the SHOCKING
truth behind the orange wire, what’s next?! Stay tuned to find out! This video was brought
to you by RealPars in partnership with Pro-control
here in the Netherlands. They are experts at control system
design and industrial automation. and they have a team of world-class
automation engineers and have been designing and implementing
industrial control systems in different industries for many years. If you want to get in contact with them, you can check out their
website at pro-control.nl. That’s pro-control.nl. We will put a link to their website in
the description below the video as well. Ok, that’s all for today’s video. If you
have learned something new from this video, it would mean the world
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