Today's video we will learn how to twist electric wire together.properly joint electrical wire is very useful to transmit the electric charge without line losses.That can be performed very simple yourself at home by following these steps described in the video.
how to twist multiple electrical wire together
properly joint electrical wire
We are not going to prove to you that twisting wires is a good way to connect. Yes, it can be made with high quality and insulated. It is also great as a temporary option. But according to the rules of electrical installations (PUE), in order to connect a wire or cable, ordinary twists are not recommended. Nevertheless, we will have a conversation about it, and very detailed. Firstly, because, contrary to the PUE, most of the connections are performed by this old "old-fashioned" method. Secondly, because correct twisting is the main stage of the most reliable ways of connecting wires - welding and rations.
What is a good twist for?
Imagine that two wires to be connected are twisted together just like. Those familiar with electrical engineering know that a transition resistance occurs at the point of contact between two conductors. Its value depends on two factors:
surface area at the point of contact;
the presence of an oxide film on the veins.
To perform twisting, the core is exposed, the metal interacts with atmospheric oxygen, as a result of which the surface of the conductor is covered with an oxide film, which has a decent value of resistivity.
Accordingly, if the twisting is performed poorly, the contact resistance increases, which in turn will cause heating when an electric current passes through the junction. As a result, the place of twisting can heat up so that the electrical wiring will catch fire. Surely everyone had to hear the phrase in life that the fire was due to a power failure.
To prevent this from happening, the contact connection of the wires must be as strong, reliable and safe as possible. That is, the twisting must be performed so well that the transition resistance is stable and does not change over time.
This method is best used for copper wires, when one of them is monolithic and the other is stranded. A monolithic wire must be stripped of insulation a little more than a stranded one. After twisting, an additional bend is made from the remaining monolithic copper tail towards the twist, due to this, the connection is more reliable.This method is also suitable for twisting aluminum conductors with different cross-sections.
The advantage of parallel twisting is that it can be used to connect more than two wires simultaneously.
Sequential twisting
With the sequential method, each wire to be connected is wound onto another. The reliability and contact of such a connection will be optimal, but this twist can be used only for two wires, no more.
Fold the stripped veins cross-to-cross on top of each other approximately in the middle of the exposed area and begin to twist. One wire goes around the other wire, in the same way wind the second wire around the first.
Bandage twist
Stranded wires can be connected to each other by the method of bandage twisting. In this case, the wires to be connected are stripped to the same length and applied parallel to each other. In this position, they are fixed with a third wire, which is tightly wound onto the bare surface of the connected wires.
Please note that with the help of such a twist, you can connect rigid stranded wires, but you must definitely use a soft (flexible) wire as a fixing one. The tighter you wind the fixing wire, the more reliable the contact connection will be.
More than two conductors can be connected by means of a tie strand.
Single core wires
All the above methods of twisting stranded wires can be used for single-core wires. But it's best to use a parallel connection in this case.
Remember the most important thing, before connecting single-core wires, the insulating layer on them should be stripped only along the conductor at an angle. This is especially true for aluminum conductors. If you run the knife at a 90 degree angle around the conductor, the insulation will of course be removed. But in further work, with the slightest movements in the place of the incision, the conductor will eventually go to a break and, ultimately, the vein will break.
Strip the insulation layer on the wires to be connected 3-4 cm. Lay the wires on top of each other at an angle of 45 degrees, but not in the place of the bare wires, but 1.5-2 cm higher from the place where the insulation was cut. Hold this place with your left hand, and start twisti
ng both wires with your right hand. First, they will be twisted together with the insulating layer, then the connection of purely bare cores will go.
No matter how strong your hands are, at the end, be sure to finish twisting with pliers, especially this again applies to aluminum wires.
Today's video we will learn how to twist electric wire together.properly joint electrical wire is very useful to transmit the electric charge without line losses.That can be performed very simple yourself at home by following these steps described in the video.
how to twist multiple electrical wire together
properly joint electrical wire
We are not going to prove to you that twisting wires is a good way to connect. Yes, it can be made with high quality and insulated. It is also great as a temporary option. But according to the rules of electrical installations (PUE), in order to connect a wire or cable, ordinary twists are not recommended. Nevertheless, we will have a conversation about it, and very detailed. Firstly, because, contrary to the PUE, most of the connections are performed by this old "old-fashioned" method. Secondly, because correct twisting is the main stage of the most reliable ways of connecting wires - welding and rations.
What is a good twist for?
Imagine that two wires to be connected are twisted together just like. Those familiar with electrical engineering know that a transition resistance occurs at the point of contact between two conductors. Its value depends on two factors:
surface area at the point of contact;
the presence of an oxide film on the veins.
To perform twisting, the core is exposed, the metal interacts with atmospheric oxygen, as a result of which the surface of the conductor is covered with an oxide film, which has a decent value of resistivity.
Accordingly, if the twisting is performed poorly, the contact resistance increases, which in turn will cause heating when an electric current passes through the junction. As a result, the place of twisting can heat up so that the electrical wiring will catch fire. Surely everyone had to hear the phrase in life that the fire was due to a power failure.
To prevent this from happening, the contact connection of the wires must be as strong, reliable and safe as possible. That is, the twisting must be performed so well that the transition resistance is stable and does not change over time.
This method is best used for copper wires, when one of them is monolithic and the other is stranded. A monolithic wire must be stripped of insulation a little more than a stranded one. After twisting, an additional bend is made from the remaining monolithic copper tail towards the twist, due to this, the connection is more reliable.This method is also suitable for twisting aluminum conductors with different cross-sections.
The advantage of parallel twisting is that it can be used to connect more than two wires simultaneously.
Sequential twisting
With the sequential method, each wire to be connected is wound onto another. The reliability and contact of such a connection will be optimal, but this twist can be used only for two wires, no more.
Fold the stripped veins cross-to-cross on top of each other approximately in the middle of the exposed area and begin to twist. One wire goes around the other wire, in the same way wind the second wire around the first.
Bandage twist
Stranded wires can be connected to each other by the method of bandage twisting. In this case, the wires to be connected are stripped to the same length and applied parallel to each other. In this position, they are fixed with a third wire, which is tightly wound onto the bare surface of the connected wires.
Please note that with the help of such a twist, you can connect rigid stranded wires, but you must definitely use a soft (flexible) wire as a fixing one. The tighter you wind the fixing wire, the more reliable the contact connection will be.
More than two conductors can be connected by means of a tie strand.
Single core wires
All the above methods of twisting stranded wires can be used for single-core wires. But it's best to use a parallel connection in this case.
Remember the most important thing, before connecting single-core wires, the insulating layer on them should be stripped only along the conductor at an angle. This is especially true for aluminum conductors. If you run the knife at a 90 degree angle around the conductor, the insulation will of course be removed. But in further work, with the slightest movements in the place of the incision, the conductor will eventually go to a break and, ultimately, the vein will break.
Strip the insulation layer on the wires to be connected 3-4 cm. Lay the wires on top of each other at an angle of 45 degrees, but not in the place of the bare wires, but 1.5-2 cm higher from the place where the insulation was cut. Hold this place with your left hand, and start twisti
ng both wires with your right hand. First, they will be twisted together with the insulating layer, then the connection of purely bare cores will go.
No matter how strong your hands are, at the end, be sure to finish twisting with pliers, especially this again applies to aluminum wires.
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