Connecting two or more conductors must not only be reliably performed (via terminals, soldering, crimping ferrules), but also qualitatively or isolated. And with the development of electrical materials electrical tape layup gradually moves to the background, giving way to a more versatile products. For example, caps PPE, which will be discussed in this article.
Why PPE caps
PPE - insulating connecting clamps are widely used in laying new wiring or elimination of home electrical fault. PPE are used as connecting and insulating member. The main feature of these products - reusability.
Various inner diameters of caps PPE. Picture with a yandex.ru
Modern caps are used by many artists mainly because of its simplicity. Standard PPE consists of a metal core, more precisely - small but rigid spring and plastic tip, performing the role of insulator. 2 special protrusion on each side of the cap allow to securely tighten the clamp on twisting.
Each manufacturer of such clamps causes the plastic caps on the respective designations that indicate the maximum number of wires that can be tightened by means of PPE. Using clamp appropriate size can be joined 2, 3 or more wires together.
Advantages and disadvantages
PPE convenient, practical, and most importantly - have an affordable pricing. Such caps save a lot of time master, as sufficient to perform twisting wire, and then put on the clip over them. At a certain skill, all operations will not take more than 3-5 minutes.
But there are also disadvantages:
- PPE should only be used in the wiring, which is laid in the room. Do not use caps outdoors.
- Clips can be applied only with respect to copper wires. For aluminum wires it is best to use special crimping sleeve.
- A common mistake of young artists is the wrong choice of cap size, because of what he later falls with twists, baring contact. The result: a possible short circuit.
The plastic cap is not only isolates and hides the contact, but also protects the wires from possible mechanical damage.
How to properly use PPE?
The main problem of young artists or people who have just started to learn the electrical work, the wrong use of PPE, nedokruchivanii cap or selecting too many products. In fact, the algorithm use of PPE is quite simple and only requires care.
The sequence of use of PPE:
1. Strip the ends of the wires to be connected with each other. You can use a simple clerical montorsky or knife or a special tool for removal of isolation - a stripper.
2. Run twist wires. Number of revolutions qualitative lay must be at least five.
3. Wear on the receiving PPE twist and fully clockwise to tighten it. Applying too much force is not necessary - the spring in the cap itself will pull together wire together.
4. Check quality of the connection cap podorgav easily from side to side.
You can not use PPE for connection and isolation of copper and aluminum conductors. The cap will not reliably protect a contact from oxidation, and soon warmed up this twist, and then burned. The best option - Compression tip, which would require special hand press.