Multi-Cable Transit System


Components of a SIC Multi-Cable Transit System

The cables pass through a frame which has been properly welded on a bulkhead or embedded on a wall or ceiling. Frames are supplied in standard sizes according to a modular system.

The empty spaces in between the inside of the frame and the cables are filled with insert blocks made from elastic material resistant to fire. Cables and insert blocks are placed in rows inside the frame according to their diameter. On this way, using spare blocks if necessary, the whole set is sealed.

In between each row of blocks it is advisable to insert an anchoring plate. This will keep the blocks in position and help the distribution of the pressure through the frame. Insert blocks are compressed by a press plate which assures the necessary tightness. The resulting empty space is filled with an end closure, also made of elastic material, which will complete the system.

SIC Multi-Cable Transit System Certifications

The SIC multi-cable transit systems are certified for naval applications No. 07043180 EC.
The SIC multi-cable transit systems (REF 120) are certified for other applications No. 07/32304347.

Frames Types

There are different types of frames depending on the future use of the multi-cable transit and the type of construction on which they are going to be used.

Frames materials:

  • Steel (zinc coated or red lead coated)
  • Aluminium
  • Stainless steel


PB Frames

For welding on metallic bulkheads or decks. Especially useful on shipbuilding.

Type Measurements (mm)
PB-01 140×124
PB-02 140×183
PB-02 140×241
PB-04 140×300


PB1 Frames

For welding on metallic walls, in those cases where the cables are already laid. After welding the frame, the loose plate is welded into the frame and wall.

Type Measurements (mm)
PB-101 140×124
PB-102 140×183
PB-103 140×241
PB-104 140×300


PB2 Frame

For building in or casting. The frame has a collar to facilitate its installation.

Type Measurements (mm) Frame (mm)
PB-201 132×124 241×221
PB-202 132×183 241×280
PB-203 132×241 241×338
PB-204 132×300 241×397


PB3 Frame

For building in or casting in those cases where the cables are already laid.

Type Measurements (mm) Frame (mm)
PB-301 132×124 241×221
PB-302 132×183 241×280
PB-303 132×241 241×338
PB-304 132×300 241×397


PBM Frame

Multiple frame made of combinations of two or more PB, PB1,PB2 or PB3.

Type N Frames Measurements (mm)
PBM-21 2 x PB-01 270×124
PBM-22 2 x PB-02 270×183
PBM-23 2 x PB-03 270×241
PBM-24 2 x PB-04 270×300
PBM-31 3 x PB-01 400×124
PBM-32 3 x PB-02 400×183
PBM-33 3 x PB-03 400×241
PBM-34 3 x PB-04 400×300
PBM-41 4 x PB-01 530×124
PBM-42 4 x PB-02 530×183
PBM-43 4 x PB-03 530×241
PBM-44 4 x PB-04 530×300
PBM-51 5 x PB-01 660×124
PBM-52 5 x PB-02 660×183
PBM-53 5 x PB-03 660×241


PBR Frame

Circular step frame.

Type Measurements (mm) Diameter (mm)
PBR-50 30×30 50
PBR-70 40×40 70
PBR-100 60×60 100
PBR-150 90×90 150
PBR-200 120×120 200
Required on walls less than 60 mm

Insert Blocks

The SIC multi-cable transit system has a wide range of insert block sizes in order to seal the most usual cables from 4 to 100 mm. Under demand insert blocks for cables with diameters up to 200mm can be manufactured.

The insert blocks are developed according to a modular system that permits all types of combinations between cables.

In the table drawing bellow, “A” indicates the type of module. Two units of each PP are needed for each cable.

MOD 15 Cable (mm)
PP-154 3,6-4,5
PP-155 4,6-5,5
PP-156 5,6-6,5
PP-157 6,6-7,5
PP-158 7,6-8,5
PP-159 8,6-9,5
PP-150/10 9,6-10,3

MOD 20 Cable (mm)
PP-204 3,6-4,5
PP-205 4,6-5,5
PP-206 5,6-6,5
PP-207 6,6-7,5
PP-208 7,6-8,5
PP-209 8,6-9,5
PP-210 9,6-10,5
PP-211 10,6-11,5
PP-212 11,6-12,5
PP-213 12,6-13,5
PP-214 13,6-14,5
PP-215 14,6-15,3
PP-216 15,4-16,0

MOD 30 Cable (mm)
PP-309 8,6-9,5
PP-310 9,6-11,2
PP-312 11,3-12,5
PP-313 12,6-13,5
PP-314 13,6-14,5
PP-315 14,6-15,5
PP-316 15,6-,16,5
PP-317 16,6-17,5
PP-318 17,6-18,5
PP-319 18,6-19,5
PP-320 19,6-20,5
PP-321 20,6-21,5
PP-322 21,6-22,5
PP-323 22,6-23,5
PP-324 23,6-24,5
PP-325 24,6-25,3
PP-326 25,4-26,0

MOD 40 Cable (mm)
PP-413 12,6-14,2
PP-415 14,3-15,5
PP-416 15,6-16,5
PP-417 16,6-17,5
PP-418 17,6-19,2
PP-420 19,3-21,2
PP-422 21,3-23,2
PP-424 23,3-25,3
PP-426 25,4-27,2
PP-428 27,3-29,2
PP-430 29,3-31,2
PP-432 31,3-33,2
PP-434 33,3-35,2

MOD 60 Cable (mm)
PP-628 27,3-29,2
PP-630 29,3-31,2
PP-632 31,3-33,2
PP-634 33,3-35,2
PP-636 35,3-37,2
PP-638 37,2-39,32
PP-640 39,3-41,2
PP-642 41,3-43,2
PP-644 43,3-45,2
PP-646 45,3-47,2
PP-648 47,3-49,2
PP-650 49,3-51,2
PP-652 51,3-53,2
PP-654 53,3-55,2

MOD 90 Cable (mm)
PP-950 49,3-51,2
PP-952 51,3-53,2
PP-954 53,3-54,2
PP-955 54,6-55,6
PP-956 55,7-57,2
PP-958 57,3-59,2
PP-960 59,3-61,2
PP-962 61,3-63,2
PP-964 63,3-64,5
PP-965 64,6-65,5
PP-966 65,6-67,2
PP-968 67,3-69,2
PP-970 69,3-71,2
PP-976 75,3-77,2

MOD 120 Cable (mm)
PP-1260 59,3-61,2
PP-1265 64,3-64,5
PP-1270 69,3-71,2
PP-1272 71,3-73,2
PP-1274 73,3-74,5
PP-1275 74,6-75,5
PP-1276 75,6-77,2
PP-1278 77,3-79,2
PP-1280 79,3-81,2
PP-1285 84,3-86,2
PP-1288 87,3-89,2
PP-1290 89,3-91,2
PP-1292 91,3-93,2
PP-1295 94,3-96,2
PP-12100 99,3-101,2
PP-12110 109,3-111,2
PP-12114 113,3-115,2

Spare Blocks

Wide range of modular spare blocks for filling empty spaces.

Spare Blocks

End Closure

Once all the blocks are in place and the system has been compressed by the action of the pressure blot of the press plate, an end closure is installed in order to fill any empty spaces between the press plate and the frame. There are different types of end closures depending on the type of frame used and how this frame is installed.


To be used with PLC1 and PLC2 press plates on those cases where the frame can be accessed by both sides.


To be used with PLC1 and PLC2 press plates on those cases where the frame can be accessed only by one side.

PEC60 y PEC120

To be used without PLC press plates. It is closed by the pressure of the front end bolts.

PEC-R: PEC-50R, PEC-70R, PEC-100R, PEC-150R y PEC-200R

For use on cylindrical recesses or with PBR frames. It supports the blocks as well as the final closure element.

Press Plates


Their mission is to transmit the pressure made by the pressure bolt to the insert blocks. Their interior is made of brass, steel or aluminium and the outside part is made of a special rubber with very high resistance to fire.


These plates fulfil the same mission as the PLC1, but the pressure bolt is already incorporated on the plate. They are used on frames without pressure bolt.

Anchoring Plates

These components are to be used in between each row of insert blocks. They serve two missions:

  • To maintain the insert blocks on the proper position.
  • To distribute and compensate the pressure exerted over the insert blocks.

They are manufactured in steel, aluminum or stainless steel in two measures PLR1 and PLR2, for frames of 120 and 60mm wide, respectively.

Anchoring Plates

How to install a Multi-Cable Transit System


The cables are drawn through the open frame. Because of the relatively large space of the frame cable pulling and is easy and there is no risk of damaging the cables
Classify the cables according to the order they will follow in the multi-cable transit system. Be careful that the cables do not cross over each other near the multi-cable transit.

Try to avoid significant changes of direction of the cables near the proximity of the multi-cable transit system.


Start packing the cables with the largest diameters first, according to the diagram previously drawn.

It is advisable to sort out the cables and tie those to be packed in the upper part of the frame.
In order to make the installation easier you can apply a light coating as lubricant to the inside surface of the frame and to the outside of the insert blocks.


An anchoring plate is inserted in between every complete row of insert blocks.
This will keep the blocks in the proper position and help distribute the pressure throughout the frame.


Before packing the last row of insert blocks, the press plate is inserted and pressed against the top end of the frame.

When the last row is packed, the compression bolt is tightened against the press plate (in case that the frame has a compression bolt).


Insert the end closure. Tighten the two bolts of the end closure until the frame is sealed completely.
Once this is done, the compression bolt is then backed off about 1/8 turn.
The installation of the SIC multi-cable transit is finished.