How to crimp the screw in the hole for multi strand wires?

Domestic buildings below 6 square meters are mostly single-strand wires; If it is a multi-strand wire, it is generally carried out after stripping the wire head for "tinning" treatment, and then the screw crimping in the hole is good, and it can be up to standard.

If you are using electrical equipment, you will need to put the wire into the "pre-insulated tubular lug" before crimping the screw in the hole. And the color of the "pre-insulated" material is required to be consistent with the color of the wire. It is certainly not possible to twist the wire into a strand of rope, or to crimp the screw in the hole after "tinning" treatment.

If you use it to make electric furnace products, the "tinning" treatment is absolutely not good, and the high temperature of the heating wire will melt the "tinning" at the other end through the copper of the connector (such as a square porcelain terminal), which is self-defeating. It is recommended that you use the "pre-insulated tubular lugs" method. Of course, the square porcelain terminal block is not the only option, if you are not limited by volume, you can also use porcelain binding posts, because the binding posts are protected by gasket sheets, the multi-strand wire can be directly wrapped around the binding posts, and then the nuts can be tightened.

Of course, if you use it yourself, want to be more convenient, and have a square porcelain terminal in your hand, it is recommended that you first tighten the wire head, put it into the terminal, and then cut a small and long copper piece, put it on the top of the wire head, and then press the screw on the terminal on the line. Doing so increases the stress area of the wire and protects the wire from damage.

The best way to connect is to connect the wires and then solder. If the large line is more than 10 square meters, use the butt cold pressing.

Multiple strands of copper wire are welded to the copper workpiece. It is recommended to fix the multi-strand copper wire with a wire nose and punch holes in the workpiece. Then the thread nose is better fixed to the workpiece with screws. This does not affect the conductivity of the multi-strand copper wire.

The one-word connection method is also known as the seven-star connection. Dial out the joint 100mm, straighten it in order at the 50mm position, make it look like an umbrella bone, and then cross each other with the same other multi-strand to the end, and then close it, wrap it one by one with its own strands, and press the remaining thread head and the next strand of each strand as a wrapped thread after crossing, and twist the braid after the last section is wrapped, and it should be arranged neatly when winding, and do not overlap each other.

Multi-strand copper wire T-connection.

The twisting method of multi-strand copper wire should say goodbye to manual twisting forever.

Why the parallel process of multi-strand copper wires has been plaguing domestic enterprises.

Usually we only rely on manual or very simple, unstable, unreliable, low life, high maintenance rate of small wire twisting equipment to achieve single strand or multi-core multi-strand wire twisting.

In many places, it is necessary to use a terminal cap to connect the internal wiring, and the twisting action of multiple wires before wiring has always been manual twisting. However, the manual twisting is inefficient, and it is extremely harmful to the operator's fingers, tired operation, easy to fall off and other problems.

More importantly, it is difficult for human hands to tighten the wire, resulting in frequent flying wires, broken copper wires or poor contact, so the twisting process has always been a bottleneck process in production.

In the context of rising labor costs and enterprise transformation and upgrading, it is imperative to adopt automated and semi-automatic tools and equipment to replace the backward production mode of labor.

What is the multi-strand hard copper wire docking method, and the national standard connection method.

It's very easy to pick up, find a master to teach you, or find a master to teach you well and seriously, you will know, I don't believe that he will appear in front of you for no reason, or let you do such a thing for no reason.

Multiple strands of copper wire are connected in a straight line.

Multi-strand copper wire T-connection.

This has to be studied for technical purposes, as an electrician this is the basic requirement, the way of wiring each specification.

Shower gel to listen to the broken map Ming.

When the fastening screws crimp the hard wire, they should be pressed in a clockwise direction.

Because the screw tightening direction is clockwise, the wire round joint should also be placed in the clockwise direction, so that it will not be squeezed open, and the more you press, the tighter it becomes. If the direction is reversed, it is easy to be squeezed out by the opposite direction force of the screw. The correct combination method is shown in the figure.

Press the screw to turn the direction of the link.

Terminal calculation method: each distribution box is calculated separately according to different sections, one terminal for one wire, and the number of incoming wires of different sections of all distribution boxes is counted, which is the total number of terminals.

In addition, most of the current finished distribution boxes adopt C45N such switches, which are not able to press the terminals, so the application of 6mm2 or less is used without terminal wiring, and the borrowing of soldering terminals above 10mm2 can be.

Generally, the wires of 6mm2 and below are respectively applied to the external wiring without terminals and the external wiring with terminals according to the actual wiring, and the large cross-section lines of 10mm2 and above need to be applied to the two sub-items of soldered copper terminals and pressed copper terminals. The terminal block itself is included in the quota subheading.

The distribution box is a massive parameter on the data, which generally constitutes a low-voltage forest according to the electrical wiring, which requires the switchgear, measuring instruments, protective appliances and auxiliary equipment to be assembled in a closed or semi-enclosed metal cabinet or on the screen to constitute a low-voltage distribution box. During normal operation, the circuit can be switched on or off with the help of manual or automatic switches.

If it is inserted into the connection, the head of the multi-strand copper wire should be immersed in tin, and if it is crimped, the head of the multi-strand copper wire should be hit into the nose. to ensure good contact.

Connect using terminal blocks.

The terminal block is used to facilitate the connection of wires, it is actually a piece of metal sealed in insulating plastic, there are holes at both ends to insert the wire, and there are screws for fastening or loosening.

For example, two wires, sometimes need to be connected, sometimes need to be disconnected, then they can be connected with terminals, and can be disconnected at any time, without having to solder them or entangle them, which is very convenient and fast. It is also suitable for a large number of wire interconnections.

There are several ways to do this:

Use the corresponding splice fittings and crimp them by hydraulic pliers.

Use the corresponding cable fittings, crimped by hydraulic pliers, and fixed with bolts.

With a terminal block, clamp brazing and bolting.

Manually twisted by an electrician.

Brazing. Wait. It is a good way to use heat shrinkable tubes, if it is 380V, you can use insulating tape first, and then cover heat shrinkable tubes, some heat shrinkable tubes have a withstand voltage of up to 10kV.

Pay attention to prevent burrs and breakages when twisting.

Multi-strand copper wire butting can be connected with wire clamp technology.

Wire clamp connection technology is a technology used for wire connection. The hook type conductive clamp is a kind of conductive part with a conductive part like a hook clamp shape, which is directly inserted into the connected busbar, and its spring blade plays a compressive role. Another conductor (which can be a cable or a boarding busbar) is inserted from the upper part of the side and fastened with a screw at the top to complete the assembly work.

The docking of 2 multi-strand copper wires are respectively batched with a section of insulating skin, respectively, a small section (about 10cm, the larger the line cross-section, the longer the length) multi-strand copper wire is separated into a horn shape (the remaining two-way original multi-strand copper wire is about 5cm, the larger the line cross-section, the longer the length), and then the interval is compacted with rubber pliers, and the two-way outer single wire is wound one by one.

In fact, no matter how much you write, you may not want to read it, and it is easy to read it. Take a look at the figure below, the winding method of multi-strand copper wire butting, with a small wire twisting tool called a patented electric twisting machine, press the switch, you can easily tighten it in half a second, the method is very simple, why bother to screw it manually with low efficiency.

Direct fork connection method below 10 square meters, and copper pipe connection above 10 square meters.

This article is very detailed. It is worth collecting electrician friends.