How to assemble 127V and 220V simple power distribution board
In this video I show how to assemble a single-phase 127V distribution board in practice, I give tips on how to save money, but without failing to meet the standard. Video made based on NBR-5410.
Let's start assembling our QDC by placing the protections on this first rail. Let's start by installing the 3 DPS's we designed. Now, on the DPS's side, let's install the general circuit breaker. And next to the main circuit breaker, we are going to install our IDR. As the lighting circuits are not going through the IDR, we chose to place them next to the IDR. There is no position rule here, you can place them in the order you prefer, but give preference to placing IDR and DPS after the general breaker, I consider this a good practice.
Okay, we've already added all the components of that first block. Now let's start assembling the bottom block,
Now on this second rail here we will place the circuit protection circuit breakers, which will be protected by the DR. We have seven circuit breakers here, two bipolar circuit breakers to protect the shower circuit, three monopolar circuit breakers to protect the socket circuits in the bedrooms, bathrooms and living room, another two monopole circuit breakers to protect the socket circuits in the kitchen and service area.
And this last rail here, class, will be available for future circuits, as we learned in class 3. Anyway, let's start connecting the cables.
Coming from the standard we have 2 phase cables, one red and one black, 1 neutral cable which is blue and 1 earth cable which is green, all of 16mm2.
We will connect the Phase cables to the top of the general circuit breaker.
As for the neutral cable, we will connect it to the bus that is at the top of the QDC and the ground cable will be connected to one of the buses that is at the bottom of the frame.
We will leave each pole of the main circuit breaker with a 4mm2 cable and a 16mm2 cable.
The 4mm2 cable will be connected to the DPS, one for the R phase and another for the S phase.
As for the 16mm2 cables, we will connect them to the R and S terminals of the IDR.
Let's run these cables behind the main circuit breaker for a better finish.
As the lighting circuits will not pass through the IDR, we will “jump” the R and S terminals of the IDR input using a piece of bipolar bus. We will also use two generic connectors to connect the phase cables. This way we guarantee a good connection.
From the neutral bus at the top of the QDC, we will pull a 16mm2 cable and connect it to terminal N of the IDR. We are going to pull another cable from this bus as well, but with 4mm2, and we will connect it to the DPS to protect the neutral.
Let's use a piece of monopolar bus to join the 3 outputs of the DPS's. With the help of a generic connector, we are going to connect a 4mm2 green cable to this bus and connect it to the ground bus.
Now let's connect the neutral output of the IDR to the other bus that is under the QDC. This bus will be responsible for feeding the neutral of the circuits protected by the IDR. The other neutral bus, which is on top of the QDC, will be responsible for feeding the neutrals of the lighting circuits, since they are outside the IDR.
Good guys, we made all the connections of the components that were on the first rail of our QDC. Then it's time to connect the components that are on the second rail of our QDC.
Installation is very simple, we are going to use a two-pole bus connected to the terminals at the top of the breakers. Here is a note for the class, the circuit breakers must be placed in position as the phase balancing was carried out.
Now let's take the phase cables from the R and S terminals of the IDR and connect them to the generic connectors installed next to the bus, and the power supply for the second rail components is ready.
What's missing now, my dears, is to connect the cables that go to the circuit breakers.
My dears, to finish it off and keep it safe, don't always forget to use terminals on the cables that will be connected to the QDC components. also do not forget to ring the cables, this facilitates maintenance. Also, use cable ties to tie the cables to the sides of the QDC and keep them organized.
Before placing the QDC cover, check the tightness of all screws of all connections made. This prevents poor contact and a possible catastrophic failure, such as a blown circuit breaker, or worse, a fire.
And finally, after the final check, screw the cover, identify all the QDC components, such as circuit breakers, IDR and DPS ́s, and paste the electrical diagram of the switchboard and the safety notice on the inside of the cover.
How to assemble 127V and 220V simple power distribution board
In this video I show how to assemble a single-phase 127V distribution board in practice, I give tips on how to save money, but without failing to meet the standard. Video made based on NBR-5410.
Let's start assembling our QDC by placing the protections on this first rail. Let's start by installing the 3 DPS's we designed. Now, on the DPS's side, let's install the general circuit breaker. And next to the main circuit breaker, we are going to install our IDR. As the lighting circuits are not going through the IDR, we chose to place them next to the IDR. There is no position rule here, you can place them in the order you prefer, but give preference to placing IDR and DPS after the general breaker, I consider this a good practice.
Okay, we've already added all the components of that first block. Now let's start assembling the bottom block,
Now on this second rail here we will place the circuit protection circuit breakers, which will be protected by the DR. We have seven circuit breakers here, two bipolar circuit breakers to protect the shower circuit, three monopolar circuit breakers to protect the socket circuits in the bedrooms, bathrooms and living room, another two monopole circuit breakers to protect the socket circuits in the kitchen and service area.
And this last rail here, class, will be available for future circuits, as we learned in class 3. Anyway, let's start connecting the cables.
Coming from the standard we have 2 phase cables, one red and one black, 1 neutral cable which is blue and 1 earth cable which is green, all of 16mm2.
We will connect the Phase cables to the top of the general circuit breaker.
As for the neutral cable, we will connect it to the bus that is at the top of the QDC and the ground cable will be connected to one of the buses that is at the bottom of the frame.
We will leave each pole of the main circuit breaker with a 4mm2 cable and a 16mm2 cable.
The 4mm2 cable will be connected to the DPS, one for the R phase and another for the S phase.
As for the 16mm2 cables, we will connect them to the R and S terminals of the IDR.
Let's run these cables behind the main circuit breaker for a better finish.
As the lighting circuits will not pass through the IDR, we will “jump” the R and S terminals of the IDR input using a piece of bipolar bus. We will also use two generic connectors to connect the phase cables. This way we guarantee a good connection.
From the neutral bus at the top of the QDC, we will pull a 16mm2 cable and connect it to terminal N of the IDR. We are going to pull another cable from this bus as well, but with 4mm2, and we will connect it to the DPS to protect the neutral.
Let's use a piece of monopolar bus to join the 3 outputs of the DPS's. With the help of a generic connector, we are going to connect a 4mm2 green cable to this bus and connect it to the ground bus.
Now let's connect the neutral output of the IDR to the other bus that is under the QDC. This bus will be responsible for feeding the neutral of the circuits protected by the IDR. The other neutral bus, which is on top of the QDC, will be responsible for feeding the neutrals of the lighting circuits, since they are outside the IDR.
Good guys, we made all the connections of the components that were on the first rail of our QDC. Then it's time to connect the components that are on the second rail of our QDC.
Installation is very simple, we are going to use a two-pole bus connected to the terminals at the top of the breakers. Here is a note for the class, the circuit breakers must be placed in position as the phase balancing was carried out.
Now let's take the phase cables from the R and S terminals of the IDR and connect them to the generic connectors installed next to the bus, and the power supply for the second rail components is ready.
What's missing now, my dears, is to connect the cables that go to the circuit breakers.
My dears, to finish it off and keep it safe, don't always forget to use terminals on the cables that will be connected to the QDC components. also do not forget to ring the cables, this facilitates maintenance. Also, use cable ties to tie the cables to the sides of the QDC and keep them organized.
Before placing the QDC cover, check the tightness of all screws of all connections made. This prevents poor contact and a possible catastrophic failure, such as a blown circuit breaker, or worse, a fire.
And finally, after the final check, screw the cover, identify all the QDC components, such as circuit breakers, IDR and DPS ́s, and paste the electrical diagram of the switchboard and the safety notice on the inside of the cover.
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