Typical strings for fibre optic cables
2. Extension link
4. Helical dead-ends
5. Earthing connector
To consult details about steel fittings, earthing connectors and guy grip dead end diagrams, please consult next pages.
2. Twisted chain link
3. Sad adjuster link
5. Helical dead-ends
6. Earthing connector
Para detalles sobre herrajes, conexiones de puesta a tierra y retenciones helicoidales preformadas, consultar páginas siguientes.
Dead end set for fibre optic cables
The dead end sets have the main function to fix the fibre optic cables to poles or metallic towers. First it is put a protection splice to protect the fibre optic cable. On this splice is assembled the dead end. In F.O. OPGW cables, the lay direction of the protection splice is the opposite to the outer layer of the cable, the lay direction of the dead end is the same to the outer layer of the cable. In the all dielectric self supporting cables, the lay direction of the protection splice is left hand lay and the lay direction of the dead end is right hand lay. The area of the loop of the dead end must be protect with a suitable thimble.
SAPREM has created a denomination that together with the number of rods, diameter, length and colour code will allow us to recognize the fitting.
The denomination ofSAPREM for the dead ends is the following:
Retención de Anclaje=dead end with two letters meaning the raw material,which they are made from, ACS, following with the letters F.O.(Fibre Optic), and with the numbers that they show the diameter for which it has been made the dead end. As you can see in the attached tables (SEE PDF document), each dead end has an application diameter range, it is the addition of the diameter of the cable and twice the diameter of the rod (from the protection splice).
La denominación de SAPREM para sus empalmes de protección es la siguiente:
Empalme de Protección=Protection splice with two letters meaning the raw material which they are made from, AL (Aleac. aluminio=aluminium alloy), ACS, with two letters F.O.(Fibre Optic), and the numbers that they show the diameter for which it has been made the protection splice. As you can see in the attached tables (SEE PDF Document) each prtection splice has an application diameter range.
Example: EPAW FO 15/I/2600 is a protection splice for a cable F.O.(fibre optic) type OPGW, it is fastened with a dead end RAAW FO 21,5/D. Because the dimeter ѓ of the cable + 2 б ѓ rod of the protection splice (15+6,52 = 21,52)
Besides the colour code of the dead end, is marked the crossover marks, indicate starting point for application on the protection splice. In the splices the colour code is marked in the centre of the fitting. This denomination is completed with the letter D if the lay direction is right hand lay,or with the letter I if it is left hand lay.
VERY IMPORTANT: The lay direction of the dead end, must be identical to the outer layer of the specified cable, and the lay direction of the protection splice must be the opposite.
Finish and Appearance
The rods of the dead end sets must be refaced in the ends to avoid damages in th application and to the specified cable. All the dead ends are gritted inside with a non-slip material under SAPREM specification ESP. 06.01.08.