Cableway frames manufactured by T.E. Mayra, S.L., is a patented system for the installation in openings that have to be carried out on class “A” divisions, to allow for the passage of cables, where it is necessary to re-establish the integrity and/or isolation characteristics of the division carried out in the opening.
A cableway frame consists of a framework, box or metallic pipe with a sealing packaging system for cables, with our modules system (patented), a singularly manufactured piece, whose mounting is quick and easy and stable in every position; vertical, horizontal etc., as the cable is fixed once it has been inserted, avoiding undesired displacements.
Components of a basic type “E” sealed cableway are: framework for welding, bolting or embedding and its corresponding modules, guiding plates (retention) and final closure packaging.
Cableway frames and their homologated components are designed so that the cables required for electrical installation can go through this electrical installation which will have to be protected by complying with the specific normative for A-60 class.
A cableway can be completely, partially or even without sealing, depending on the applicable normative of each particular case.
Cableways frames and their modules are homologated as isolating protection for fire water, gas…, for cable passage to the different compartments of a naval or industrial electrical installation, bulkhead, class “A” decks or civil engineering ceilings or walls, according to IMO-RES -A.754 (18) normative, on board ships, sea platforms, electrical generators and transformers, control and distribution protection centres, cranes, cabins and underground electrical troughs, telephony etc…
These protection elements must be compulsory installed in Class “A” divisions when there is a risk factor in the passage of electrical conductors and the normative requires so.
Service output election for a simple Cableway or Pipe Frame.
The established homologated service output normative for our simple frames is that of 4 sizes (1-2-3-4-) Type E-11, E-12, E-13 y E-14.
In the attached plan the service output of the frames is shown on a grid surface in mm. (each square 10mm).
Assembly is usually started from the bottom of the frame. A service output example could be; if cable diameter is 36 mm., then we would use type PC 60-36 cableway modules and this will take up 6×6=36 squares, half of the service output of the row, then, only two PC 60 modules could be installed PC 60-…, on the other hand if cable diameter is 6 to 16 mm., a 6 module line type PC 20 -…could be used, the same calculus would be made for PC 30, PC 40, PC 90 etc..
For guiding plates (retention), there is no need to leave room.
In the following plan we can see an example of how the service output of a frame is used.