What kind of pipes are suitable for hidden lightning rod into facade?

According to the old, no longer valid standard, a non-metallic unbreakable pipe having a lightness (inside diameter) of min 29 mm had to be used for the hidden lightning rod.

This standard has not been valid for many years, but still many people demand pipes.

As a producer, we recommend using pipes with a medium mechanical resistance of 750N / 5cm.

The most suitable flexible wiring pipe is SUPER MONOFLEX 1240, which has an internal diameter of min. 31.2 mm.

What kind of boxes can we mounting into the wood (flammable substrates)?

What is wood really? And can we install the box in C3? Our answer is:

Currently it is difficult to install the box on or into the C3 materials because the standard ČSN 33 2312 / Z1 provide with respect to ČSN EN 13 501-1 the end of sorting of materials to the degree of flammability and converts this classification into reaction to fire classes. Uncertainty about whether I can install wiring boxes comes from C3 materials, we mention the transfer of C3 flammability materials. We only mention the transfer of C3 flammability grade materials. Since June 2005, these materials have been identified as materials of the reaction class E or F.

The wood has never been in this category. Hard wood, such as beech or oak, was even hardly flammable in the C1 flammability grade. It is understandable that each wood is finally surface-treated and this surface can increase its flammability. In order to avoid similar assumptions, we will always have in mind materials of reaction to fire class F. This classification must be provided by each manufacturer of the construction product.

And now to the standard ČSN 33 2312 Electrical equipment in and on flammable substances. The above-mentioned amendment to Z1 introduces a paragraph in the introductory paragraph of the original standard ČSN 33 2312 of 8.5.1985, which refers to the current validity of this standard together with the standard ČSN EN 60670-1-Box and complete covers for electrical accessories for residential and similar solid electric installation. This standard will replace the standard from 1.10.2007 for the standard ČSN 33 2312. For 7 years now, the wiring box has been complyed with another standard than the electrotechnical public think about.

Classification 7.2 according to the method of installation - 7.2.1 Embedded, semi-enclosed or put in such as flammable walls, flammable ceilings or flammable floors to be followed by sorting according to, such as hollow walls, hollow ceilings, hollow floors or furniture. We have mentioned these sorts just because KOPOS KOLIN a.s. produce wiring boxes into hollow wall (in ocher color), tested and classified according to these classifications. From the 850 ° C flaming loop test and the above classification, we can clearly recommend mounting on wiring boxes into hollow walls to materials of reaction to fire class F.

And because, according to the standard, there is no more flammable substance, there is no concern about the possibility of installing our boxes into hollow walls on the construction material with any reaction to fire.

What is the minimal bend radius of wiring conduits?

The minimal bend radius of wiring conduits KOPOS is expressed in millimetres and relates to the inner central axis of the tube (see the figure).

Nominal dimensionMinimal bend radius (mm)
16 60
20 80
25 100
32 120
40 170
50 220
63 250

What is the minimal bend of corrugated tubes KOPOFLEX?

KOPOFLEXOuter diameter (mm)Inner diameter (mm)Minimal bend radius (mm)Package (m/kg)Package dimensions (cm)
KF 09040403223050 / 9,580 x 25
KF 09050504135050 / 13100 x 30
KF 09063635235050 / 15,790 x 46
KF 09075756135050 / 18,7120 x 40
KF 09090907540050 / 27125 x 45
KF 091101109440050 / 34,5120 x 70
KF 0912012010050050 / 37,5150 x 60
KF 0912512510850050 / 39150 x 70
KF 0916016013665050 / 46190 x 80
KF 0917517515070050 / 64200 x 65

What is the different between mars and jupiters cables?

These names are distinguished by dimensional series of cable trays.

MARS cable trays have the traditional dimensions used on the Czech market with a side height of 50 and 100 mm and widths of 62, 125, 250 and 500 mm. The total length of the trays is 2.1 m.

The JUPITER cable trays are produced according to standard European dimensions. These trays have a side height of 35, 60, 85 or 110 mm and are available in widths of 50, 100, 150, 200, 300, 400, 500 and 600 mm. The standard length of the tray is 3 m.

What is the definition of self-extinguishing?

Self-extinguishing is the flame spread resistance, which divide by product group (boxes, trunkings, pipes). Each group is different and its exact definition is given by the appropriate standards. In general, the product or material is self-extinguishing if the flame time is extinguished after the flame source is removed beyond the standard.

What is the capacity for inserting the number trunking for wiring trunking and pipes?

Examples of arrangement are shown in the table; it is calculated with the utilization of 60 % of the inner diameter.
For more information click here.

What conditions must be completed for installation of trunkings and trunking boxes on flammable substrates?

Cable trunkings KOPOS can be mounted on any substrate materials of flammability class A to C3. A condition, however, must be completed that the cable led through the trunking is not joined, interrupted or clamped anywhere along the line.
Trunking boxes can be mounted directly on surfaces of flammability class A to C2. In case of installation on a material of flammability class C3, it is necessary to use a thermal-insulation pad under the box.

What class of flammambility belongs wood?

The different types of wood differ in assembling and properties, so it rage into different groups. For completeness, we provide summary of all the most well-known types of materials and their assignment to flammability classes.
For more information click here.

What are the possibilities to install double sockets into the trunking boxes?

The KOPOS assortment includes several trunking systems that can be fitted with double sockets. They are LK 80X28 2ZK, LK 80X28 2R, LK 80X28 2ZT and halogen-free LK 80X28 2ZKHF and LK 80X28 2ZTHF.
The LK 80X28 2R trunking box allows the installation of 2 units (eg single socket) or the installation of one device and the VLK 80 / R lid with terminal plates. The box is also suitable for a double socket together with the terminal plates and the VLK 80 / 2R cap. If the box permits the installation of a double socket, this is marked by the appropriate symbol in the catalog.

What are the classes of possibilities to fiill with soil protectors KOPOFLEX or KOPODUR?

The standard ČSN 73 30 50 divided soil into a total of 7 following classes. The summary gives a simplified feature.

ClassSoil characteristics
1Compact soil of soft consistency and incompact loose soil with gravel grains up to 5 cm (max. 10 % volume)
2Compact soil of ridgit consistency and medium lying down of soil with gravel grains up to 10 cm
3Compact soil of solid - ridgit consistency, clay soil with soft – ridget consistency and incompact lying down of soil, gravel grains up to 10 cm, cement gravel and weathered rock
4Clay gravel solid – ridget consistency, rough gravel with grains up to 25 cm and bouldery component up to 0,1 m3, gravels with clay cement, weathered rock
5Rough gravel grains 10 – 25 cm, incompact soil of 4 th class with clay cement solid consistency. Healthy weathered rock
6Strengthened weathered rock, incompact soil with bouldery up to 0,1 m3
7Healthy rocks

Accurate definition of 1st class according to KOPOS KOLIN a.s. recommends that the KOPOFLEX and KOPODUR shields are covered with soil with grains up to 50 mm in a maximum volume of 10% in soil. The detailed conditions are determined by EN 1610, which replaces an already invalid ČSN 73 30 50. Here is a description of the soil, which is already ivalid according to the standard but it describes the exact nature of the soil.

a) Compact, soft consistency. E.g. arable land, clay, sand clay, muddy sand
b) incompact, loose grains of up to 20 mm with grains over 20 to 50 mm in volume up to 10% of the total volume of first class soil eg sand, sand with gravel, sand gravel, small and medium gravel or gravel with stones
c) construction waste and weights of a similar nature to soil classified as first class

What are new classes of flammable material?

How much practical pressure can be used in blowing conduit HDPE protectors?

HDPE Optical Cable Protectors are tested at 1.5 MPa for 1 hour. When blowing, a pressure of 1 to 1.2 MPa is used in practice.

How many meters are used KPS - cover of cable clamps SONAP?

Every 3.5 m (going up the floor) and it is only a mechanical barrier against spontaneous cable breakage in case of fire (does not use as a fire plug).

How can you divide and shield the power and data networks in parapet channels?

KOPOS offers several solutions for dividing, shading and arranging ways in parapet trunkings: plastic partitions PEKE 60 and PEP 60, plastic partition with PKS 70/60 metal foil, PEP 60 / K metal partition and SK 40X20 and SK shading channels SK 40X33:

  1. The partition PEKE 60 uses to divide the inner space of the electrical installation canal, and thus to better handling of the cables and their organized.
  2. PKS 70/60 metal foil is a modification of the PEKE 60 partition. Due to the thin layer of the metal foil, it has similar properties to the metal partition but is considerably lighter. Individual partitions PKS 70/60 must be connected. For this purpose, the PLSK connection cable is used.
  3. PEP 60 is a new type of plastic partition that clicks into the inner rails located at the bottom of the parapet trunkings. The partition is hang up and its dividing plane is shifted. The partitions in the parapet trunking are more efficiently distributed.
  4. The PEP 60 / K metal partition is a shape like plastic partition PEP 60 - its dividing plane is also moved to the point of attachment carried out with the help of PSK 1 clamps. The individual partitions PEP 60 / K must be interconnected. For this purpose, the PLSK connection cable is used.

Shielding canal s SK 40X20 and SK 40X33 ensure good shielding of the elongated cable and uses similarly to partitions for dividing inside space of the parapet trunking.
The shielding can only be effectively shielded by closing the conductor into a metallic "casing". For this purpose, the SK 40X20 and SK 40X33 shielding canals are used, similar to the partitions for dividing the inner space of the parapet trunking and in addition provide good shielding of the elongated cable. The individual parts are connected by a PLSK connecting cable.

Do you have a fire resistant dowels into the gypsum walls?


Do you comply with cable trays water conduct requirements?

The tray system is designed to provide good interconnection when joining individual trays. This is achieved with a fixed connection using special NSM 6X10 screws.

The claim is based on the test report concerning cable routes and cable ladders classed under to ČSN EN 61357 standard pursuant to Article 6.3.2 as cable routes with the characteristics of electrical continuity to ensure protective bonding and ground connection. Under to Article 11.1.2, an AC current of 25 ± 1 A with a frequency of 50 Hz to 60 Hz is fed along the length of the test samples. The test performed under this article was compliant. Impedance on the circuit board is less than 50 Mω. The cable trays and cable ladders were also found to be compliant during the test.

Can we use Omega clamps and clamps 67xx as a rising route?


Can we connect more cores into one fire resistant ceramic clamp?


Can kopos fire resistant systems mounted on material another producer?

Yes, if the anchor element has a fire resistence certification.

What is the halogen-free material? What is the differrent between halogen-free and PVC material?

The halogen-free material is a material that does not contain a group of halogen elements (fluorine, chlorine, bromine, iodine, and astat). These fire elements release substances that are toxic to humans in the form of toxic fumes but also cause corrosion of metals. Halogen-free plastics are safer, and products from them are particularly convenient to collection and escape routes (public spaces, railway stations, theaters, cinemas, shopping centers, etc.). PVC or polyvinyl chloride is not a halogen-free material because it contains chlorine.