Hi, DIYers.
This is Michael from Alarm Grid.
And today, I'm going to be talking about providing
AC power to an alarm system.
AC power represents the primary power source
for an alarm system.
It's basically the transformer that's
plugged into the wall outlet that goes to the panel.
Electrical current travels from the transformer
through a wire to the panel, and it gets to the panel,
and that's how the panel stays running.
The reason it's called a transformer
is because it transforms the high voltage
current from the outlet into low voltage
power to power the system.
The low voltage power won't overpower the system,
it won't fry it, so to speak, and it
won't mess up your equipment, assuming you're
using the proper transformer.
You often see these referred to as step-down transformers.
Because like I said, it's stepping down
the high voltage down to low voltage power
that won't overpower the system.
So I have some props today, share Intel, to share with you.
To show you a little bit about what
I'm talking about here when I'm talking about a transformer
and wiring and everything.
So there are different types of transformers, like I said.
You'll encounter AC transformers and DC transformers.
The type you use depends on the specifications of the security
system you're using.
Some systems will need AC power and others will use DC power.
Now a big difference is that when
you're using an AC transformer, polarity doesn't matter.
Meaning you don't have to observe which
wire goes to which terminal.
That is for positive and negative power.
Both of the terminals will be equivalent,
and you can have either wire going to either power
connection on the panel.
So I have one transformer here, this
is an example of an AC transformer.
And you see it just says, AC and AC,
so I could have either copper wire going to either one
and then having it go to either connection at the panel.
You won't have to observe polarity.
So that makes it a little bit easier,
just something you don't have to worry about.
But conversely, this transformer right
here is the DC transformer.
So if you look closely you'll see
that it has a positive terminal and then a negative terminal.
So positive traditionally, that's
where you connect the red wire, and the negative,
that's traditionally where you'll connect the black wire.
Negative also sometimes referred to as the ground connection.
And you'll want to observe polarity at the panel as well.
When you go to connect the wires at the panel,
you want to make sure that the positive, like I said,
that's usually the red one, is going to something like 12V DC
or you'll have a positive symbol, a plus sign.
And then the negative, the black wire, it's
going to ground G and D or maybe a negative symbol, a minus
sign.
So you have to observe polarity on the DC transformer.
Now, as you can see on both of these transformers,
there is no wire currently connected.
The wire is detachable, and you actually
have to supply your own wiring in most cases.
Usually with a system, it will include a transformer,
but it won't include wiring.
Now, there are exceptions to this rule,
sometimes it will include a wire,
but traditionally, you do supply your own wiring.
And this is because traditionally alarm systems
are--
in the past, they've mostly been installed
by professional installers and you
would expect a professional installer
to have wire, cabling, readily available in their work vehicle
so they can go and cut whatever wire
length they need for the job.
Normally speaking, you want to have the wire
to be enough distance to reach the outlet and the panel
obviously.
But you don't want it to be too much longer than that.
You want it to be just long enough.
You want like a little bit of slack,
so that way you can complete the connections comfortably.
But you don't want to have a wire that's super long.
And I'll explain more about that in a little bit.
And that's also just for preparation,
is that way you're not having wire going
all over the place or anything.
But a professional installer will
be able to cut the wire to the exact need
that they need for the job at hand.
So that's a big reason why the wires are detachable.
Also just in case the wire becomes damaged or cut then
you don't need to replace the entire transformer.
And just as an example here, I do have
a transformer that is fixed--
has a fixed wire, a permanently connected wire
that can't be detached.
So you see if this transformer--
if the wire on it were to become damaged,
then I would likely need to replace the entire transformer.
So that's pretty inconvenient.
So you don't usually see those well with alarm systems.
You might occasionally, but that's not as common.
Now, I do want to talk a little bit about some
of the wiring you might encounter with an alarm system.
One thing I do want to mention is, like I said,
there's a maximum wire run distance
that most panels will have in their specifications.
As current travels down a line, there's
a loss of current along the way.
A small amount of current becomes lost along the way.
And it becomes more prominent as the cable becomes longer.
So if the cables too long, too much current
will be lost along the way and not enough current
will reach the panel.
You'll get an AC lost condition or the panel
might not power on.
So you'll want to observe the maximum wire run distance based
on the panel you're using.
And that also applies based on the thickness of the wire that
using or the gauge, the AWG.
The most common gauges for alarm system wiring,
it's usually a 18-gauge or 22-gauge wire.
Lower gauges, are thicker than higher gauges.
So 18-gauge wire is thicker than 22-gauge wire.
When you have thicker wiring, it holds
currents a little bit better.
So you'll be able to do a longer wire run.
So if you're worried about having to do a long wire run,
if you really have to stretch the distance from the panel
to the transformer, to where it's being plugged in,
the outlet, then you probably want
to go with a thicker gauge wire.
Just to show you some examples here, I do have some--
believe this is 18 gauge wire right here.
And you'll see that this is solid core wiring.
Now, we normally don't recommend solid core wiring.
You can use it, it works just fine.
It's going to accomplish the same goal as any alarm wiring.
The other type that I'm going to show you today being stranded
alarm wire, which is what we recommend.
But you'll see that this is a little bit less flexible.
I mean it is flexible, I am moving around as you can see.
But it's not as forgiving.
It can become cut pretty easily.
It's just a solid core, it's just one solid inner wire.
Some installers might prefer working with this.
I personally don't.
What I prefer here, is the stranded wire,
which I have just a small piece cut here just
to show you for example.
You see that the wire is split into different strands,
I can split it up.
So even if one strand were to become broken,
then it would still work fine.
It would still be able to transmit the current down
the line.
So it's a little bit more forgiving.
It's more flexible, it's a little bit easier to work with.
And you see that this is 4-conductor wire here.
So if I only needed to use two of the wires,
say I just needed the red and black for power,
I could just tie the green and the white wires back
or I could cut them, and I would still be able to use this fine.
So that's an advantage to a 4-conductor wiring there.
This back here was a 2-conductor wiring.
It just has the two inner wires, which
is fine for providing power, but there
might be some applications where you
do need the four inner wires such as motion detection
sensor.
A hard wired motion detection sensor where data and power
are being transmitted.
Data being zoned status information between the panel
and the sensor.
So whether you use 4-conductor or 2-conductor wire,
it's up to you.
You can double up 2-conductor wire,
by the way, if you need a four wire connection.
So that's also something to keep in mind.
But this is 22-gauge wires, so it
won't be able to do as long of a wire run as this 18-gauge wire.
This is a little bit thicker, so it
can hold current a little bit better
as it travels down the line.
So make sure to look at the specifications for your panel
to see the maximum wire distance,
and it usually differs based on the gauge you're using.
When you are preparing wire, you will
need to have a wire stripper.
We have one here.
I'm not going to be demonstrating it on camera,
but I do want to show it off.
We have markings on the wire stripper based on the gauge
that you can use to insert the inner wires.
You see there's an outer shield for the wires
and there's inner wires in there,
and then you strip the covering off the inner wires
to reveal the copper.
So you would do this based on the gauge.
If I were doing a 22-gauge wire, I
would stick it into this hole in this be able to pry right off
and reveal the copper.
You see that I already did this in the wire
that we have here today I already prepared it,
but you see on this end it's not repaired yet.
I would have to remove the outer wider
area to reveal the four inner wires
and then strip them one by one.
So that's something I would do when preparing wire.
But there is an alternative to having to prepare wire.
We have what's called a Honeywell LT-Cable,
and this is an already prepared wire,
I didn't do anything to this.
It comes in two parts, there is a small part right here,
and then there's a larger part, which
we have tied up to make it easier for me to hold.
But you see the larger end ends in spade connectors, that
can easily connect at the transformer.
So you would make these connections
using a screwdriver.
And then it goes down to the male barrel connector
on the other end and plugs into the female barrel
connector like that.
And then at the other end, you have some ports
that you can easily plug into the panel, that will easily
go in.
You will see some panels that have a barrel
connector that you can use to just-- you won't have to use
the small portion of the wire.
You can just use the large portion of the wire
and that entails connecting at the transformer
and then this part goes into the barrel connector
at panel, the female barrel connector.
And I believe that this is a positive ending connection.
So you have to make sure your panel supports it,
if it does have that barrel connector.
So check those specifications to make sure that's the case.
It's a positive center connection,
something like that.
So just make sure you look into that
And most cases any panel that's going
to support a barrel connector--
not all panels will have that.
An example of a panel that does the 2GIG GC3e, actually does.
And it will be fine, but you do want
to check the specifications to make sure you
don't reverse polarity.
So make sure to look into that.
So that's pretty much providing AC power to a panel.
And most panels will come with a transformer,
but you will need to supply your own wire in most cases.
There are exceptions.
The QOLSYS IQ Panel 2 Plus, comes with a prepared wire
for you to use and all you need to use to set it up
is a screwdriver.
So it really varies depending on the wire--
I mean depending on the panel that is.
Just make sure that you observe the maximum wire distance.
Remember that thicker wire, a lower gauge,
will be able to allow for a longer wire run.
So that's something to keep in mind
if that's an issue for you.
The Honeywell LT-Cable, I didn't mention this,
it's only 8 feet long.
So if you need something longer, then you
might consider preparing your own wire.
While this is convenient, it's not necessarily
the longest wire out there.
So you need to keep that in mind.
And remember we do recommend stranded wire over solid core
wire.
Both will work fine if you happen
to have solid core wire on hand, you don't necessarily
feel like you need to go out and get new stranded wire.
But if you are wiring off, then that
might be a worthwhile investment.
Just because it's easier to work with,
and it's a little bit more forgiving.
Like I said, even if just one of these--
like if one strand comes off, like, if I were to just take
that guy right there on this white wire,
and it wasn't properly connected,
then the other wires would still be there to pick up the slack
and do the job.
So that's what you need to know about providing
AC power to a panel.
It's a transformer, it's a step-down transformer
that turns high voltage power into low voltage power that is
suitable for an alarm system.
So if we have any questions about providing power
to an alarm system or you want to learn more
about alarm monitoring service or you have questions
about a specific alarm system, send an email
to support@alarmgrid.com.
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