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10 square cable is folded 90 degrees with the connecting pipe, does it affect the line?

First answer: 90-degree bending of the wire will not affect the resistance of the wire, but it will destroy the insulation layer of the wire, accelerate the aging of the external insulation layer of the wire, and cause potential safety hazards.

So the problem of the topic belongs to the process of wire laying.

One of the books I teach is Electrical Technology and Tooling, and there is a special chapter in the book to discuss wiring technology. I left this book in the school office and didn't bring it back. There is also a book on my bookshelf called Design and Manufacture of Electrical Control Cabinet-Structure and Technology, which also talks about this issue. Let's look at the excerpt from the second book:

Pay attention to the "requirements for wiring in the control cabinet", the third of which is: "The cross-sectional area is not more than 8mm? , its bending radius should be greater than 3 times its outer diameter ... ".

This is the basic requirement of wiring technology.

Let's take a look at the excerpts from the conductor's foreign classics, as follows:

The conductor in the main picture is introduced into the watt-hour meter, and the cross-sectional area is generally 2.5 or 4mm? Conductor. We use 4mm? Take the conductor as an example, its external meridian is 4.2mm, multiplied by 3 to get12.6 mm. It can be seen that 4mm? When laying wires, the bending radius shall not be less than 12.6 mm. ..

Let's take a look at the picture of the theme:

We observe with naked eyes that the bending radius of the wire in the figure is roughly twice the diameter of the wire. The bending radius is really small, but it should be larger.

Wiring in the switch cabinet should be horizontal and vertical, but there is a requirement of bending radius at the corner.

Let's look at the picture below:

ABB's nuclear low-voltage switchgear

We see that the wires from the trunking naturally bend into the terminal, instead of being forced to bend at right angles.

Look at the picture below:

Components and wiring in drawer of ABB switch cabinet

We also see that the wiring in the drawer is not required to look good, but the wires are bent at 90 degrees.

This is to lay the wire according to the basic process requirements.

The manufacturing technology and wiring technology of switchgear have both national standards and specifications and enterprise standards and specifications of production enterprises, which is a science. There are many technical conditions and requirements involved, and I am not completely clear about many regulations.

Tell a joke: I once visited Kai Guanchang in a certain country and saw the workers wiring. Obviously, there are not many wires, but the wire harness is horizontal and vertical, thick and beautiful. I thought it was strange. I asked the workers to untie the harness. It turns out that many broken wires were pressed into the wire harness just for the sake of uniform wire harness thickness! ! ! This shows the level of this domestic Kai Guanchang.

It can be seen that the so-called horizontal and vertical laying of lines by the subject has preconditions. Only when the wiring process and technical requirements are met can the aesthetics be considered.

Answer over.