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PPE caps insulating for twisting wires

 


Description of PPE caps, their purpose and application.

The connection of the conductors of wires of any electrical wiring should only be carried out using certified terminals simple twists, even with the use of electrical tape are not allowed. When it comes to household wiring, the caps insulating caps of PPE are very often used as such clamps.

The main reason for their mass distribution is ease of use. What are they like?


PPE cap - this, oddly enough, is really a cap made of plastic compound that does not support combustion. Inside this cap is a conical metal spring. When the PPE is twisted with effort into twisting, the spring coils move apart and compress the wires of the wires, and the plastic cover of the cap provides electrical insulation, fire protection and mechanical protection.

PPE capsOf course, all this happens only when the PPE cap is correctly selected for its nominal value. The fact is that PPEs are classified by the total cross-sectional area of ​​the twisted cores. This area is characterized by numbers - the number of personal protective equipment, which can be from 1 to 5. The larger the number of personal protective equipment, the more wires of a larger cross-section it can "twist".

But here we must be careful. The fact is that there are domestic and European standards for PPE caps. Both there and there the denomination of PPE is indicated by a number, but European PPE is much smaller. Therefore, when choosing PPE caps, it is better to focus not on their number, but on the total cross-section of the wires, which is always indicated on the package.

PPE capsIf in work you use PPE of too small or large denomination, then it will not be able to pinch your twist, fly off and prove to be useless, or even dangerous to operate. In addition, you must remember that with the help of PPE it is impossible to connect aluminum and copper wires to each other - in this case, only a terminal block or clip with a transition metal plate can be useful.

Usually, the color of PPE does not have any practical value; it is not specified by the standards and requirements of the PUE. But if desired, you can always use, for example, brown PPEs for twisting phase conductors, blue ones for twisting zero wires, and yellow or green PPEs for twisting protective zero wires. Sometimes it’s convenient.

See also at bgv.electricianexp.com:

  • Wago terminal blocks in home wiring
  • Wiring methods: from twists to soldering
  • How to connect wires and cables of different sections
  • How to connect copper and aluminum wires
  • Terminal blocks for connecting wires and cables
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    Comments:

    # 1 wrote: | [quote]

     
     

    Complete nonsense !!!!!!!!!!!!!

    What other caps))))

    The spring weakens over time, and at first it is not really ...

    it’s just like normal Sovdep caps yet ... only for isolation, and no more, but I like the old ones, they perform their function - to isolate, and only, not to provide contact, and these garbage are full on show-offs ...

    ))))))))))))))))

     
    Comments:

    # 2 wrote: Salex | [quote]

     
     

    Sovdepovskie caps - provided only twist insulation, and NORMAL PPE caps have a seamless, seamless copper tube inside. It is NECESSARY AND NECESSARY to crimp such caps - ONLY with special crimping pliers, and not pliers, side cutters or teeth of the eminent master ... with "Adna thousand ... eleventh year"

    When crimping with special pliers, complete rolling occurs with a tight crimp of the tube around the metal of the conductor, and not a simple squeezing and "smearing" of a thin-walled tube of the PPE cap - without tight crimping.

    AS KNOWN ...))) The current flows along the surface of the conductor and the higher the density of CIRCULAR COMPRESSION by the tube of the cap of the SIZ - METAL OF THE CONDUCTOR - the more reliable the contact between the metal of the twist conductors.

    So that...before voting here ... about the show-offs ... and garbage ... - I recommend not to reproach the author of the article ... but to read at your leisure ... physics textbooks, ledgers on the basics of electrical engineering, and bumping your head on the doorpost on leisure - remember some of Ohm's laws!

    Good luck with the learning process of learning theory and success in acquiring a decent tool for electrical work! And then, as in that joke:
    Until a competent and experienced leader appears on the field, each gopher is AGRONOM! And the tractor clanged ...))) - the gophers dive along the minks and wait ... until the grain ripens something to eat for free ... and then imposingly clever about each other ...))))))))) ))))

     
    Comments:

    # 3 wrote: | [quote]

     
     

    GO !!!! smile By the way, the most common version of cable connections among installers and most often they are only used. And they twist with the hands of the installer with little effort. And not with any special pliers. I wonder how they look even(SaleX), and where are they finally sold wink

     
    Comments:

    # 4 wrote: gaudin | [quote]

     
     

    To spin the imported caps there is a special machine. At a construction site it is very popular when you manually wind 100 caps in one day - your fingers hurt.

     
    Comments:

    # 5 wrote: | [quote]

     
     

    Salex,
    KNOWN ...))) Current flows along the surface of the conductor
    For example, I know that this is true only for high-frequency circuits, which are not discussed here. In apartment wiring, where the voltage has a frequency of 50 Hz, current flows throughout the entire cross section of the conductor.

     
    Comments:

    # 6 wrote: | [quote]

     
     

    No, I don’t trust PPE as much, it’s better to put on a terminal block for twisting, and make the twist more authentic wink As some people like to say - 7 twists replace the sleeve, 9 twists replace the solder, and 13 twists replace the weld ...

     
    Comments:

    # 7 wrote: | [quote]

     
     

    Quote: SaleX
    It is NECESSARY AND NECESSARY to crimp such caps - ONLY with special crimping pliers, and not pliers, side cutters or teeth of the eminent master ... with "Adna thousand ... eleventh year"

    This is how interesting you are going to PLASTIC !! crimp caps with pliers? (or whatever)

     
    Comments:

    # 8 wrote: | [quote]

     
     

    whoever says that, but I do twists like this: the wires are stripped and tightly twisted so that the length of the twist is about 10 cm. then wraps siz and reaches for pliers and isolates all this at the beginning of xb with electrical tape and then pvc. I do not argue, the twisting turns out to be cumbersome, and if there is not enough space in the box, then put the second one next)

     
    Comments:

    # 9 wrote: | [quote]

     
     

    Based on the vast experience in electrical installation work of internal wiring, I can say that it does not replace wires twisted by hands and squeezed with pliers, naturally insulated with PVC tape. Why is evil both cheap and tight. I agree with Oleg: -

    7 twists replace the sleeve, 9 twists replace the solder, and 13 twists replace the weld ...

    PS Buy a cap. And now cool to the cap. And carry around with a hundred caps, or choose a roll of electrical tape in your pocket.

     
    Comments:

    # 10 wrote: | [quote]

     
     

    About the co-workers agree colleagues !!!!!! I do not use electrical tape, heat shrink tube and building hair dryer ..!

     
    Comments:

    # 11 wrote: | [quote]

     
     

    Hello, Alexander! Tell me, where in general does the PUE talk about personal protective equipment? If we talk about the connection by compression, then the springs are not mentioned there at all. We have collapsible and non-collapsible connections and how they are performed is prescribed in GOST 10434-82.

     
    Comments:

    # 12 wrote: Author | [quote]

     
     

    Hello, Eugene.

    The PUE does not say anything about PPE. It is a question of "certified" clamps. And PPE are.

     
    Comments:

    # 13 wrote: | [quote]

     
     

    Good afternoon, people, you argue about different things. There are sisy with a tube inside a plastic cap, they are sometimes crimped by a press. And there are carbolitic ones with a spring inside. They wrap them in any way. The only question is in the installation recommendations that the spring should be twisted after unscrewing the siza. everything happens with aluminum, but the spring does not remain on copper ...... :(

     
    Comments:

    # 14 wrote: | [quote]

     
     

    In fact, the color determines the size of the caps ...

     
    Comments:

    # 15 wrote: | [quote]

     
     

    I don’t know ... I have been scalping twists for 11 years now and don’t bother with all kinds of nonsense like terminal blocks and SIZiks ...

     
    Comments:

    # 16 wrote: MaksimovM | [quote]

     
     

    If you logically think, can a spring wound on a twist ensure reliable contact? I think that normal contact is ensured thanks to twisting, but no less thanks to the spring of the SIZ. It turns out when the twisting weakens, the contact connection is broken. Why then overpay if the PPE acts primarily as an insulating element? You can make ordinary twists and insulate them with electrical tape - the quality of the contact connection will be the same and there will be more space in the junction box.

    If we are talking about those caps (that Vladimir mentioned) that are crimped, then they really provide a reliable contact connection.

     
    Comments:

    # 17 wrote: Dmitriy | [quote]

     
     

    Hello. I am new to this forum, but have been reading articles for a long time. I will express my opinion: when using connections in distribution boxes, I use only PPE. Pre-twist them with pliers, then just wind the PPE. AND EVERYTHING! There has not been a single case of ignition or melting! (Pah-pah-pah).
    As for the length of the twist, there is also an opinion: I tightly tighten it to 4-5 turns, it makes no more sense. This length is enough so that the wires simply do not "disperse", and nothing more is needed! After all, the current flows only at the beginning of the twist, at the first turn (I do not consider twisting when the wires are twisted towards!)

     
    Comments:

    # 18 wrote: Yuri | [quote]

     
     

    For those who twist long strands, advice, try twisting a bundle of wires into a screwdriver ... the twisting is spectacular, customers like it, and the parts of the wire in insulation are also twisted to the base, which makes it easier to put into a box. I make twists of 5 cm and solder with a gas soldering iron, the caps - in my opinion, some sort of nonsense, can be used in serviced boxes, but not for giprok and so on.

     
    Comments:

    # 19 wrote: Alexander | [quote]

     
     

    The caps on aluminum are the most: in five years, aluminum has just spread and now the wires can not be torn off.

     
    Comments:

    # 20 wrote: | [quote]

     
     

    And if 10 wires of aluminum are twisted, then they will spread under the cap?

     
    Comments:

    # 21 wrote: | [quote]

     
     

    Copper with copper: twisting - soldering - PPE - electrical tape = forever. Aluminum with WAGO aluminum with filler, bolt, PPE, welding. WAGO aluminum with filler, bolt (between washer conductors), terminal blocks (only in accessible places). It is unforgettable to check the operability of automatic machines; they protect the cable from overload - heating; we draw separate lines for all power equipment and do not overestimate the rating of automatic machines.

     
    Comments:

    # 22 wrote: | [quote]

     
     

    In industrial installation only soldering and terminals. In household or PPE or terminals.