PROCEDURE FOR CABLE TRANSIT INSTALLATION

PROCEDURE FOR CABLE TRANSIT INSTALLATION

Tools and equipment needed should be in good condition and must be checked by Instrument Supervisor prior to· use in the construction area. These includes but not limited to:

• Set of Instrument Hand Tools
• Welding machine
• Electric Power Tools (i.e. electric drill, etc.)
• Portable 120VAC, 60 Hz Gasoline Powered Generator

General Requirements

1. All PIB’s, AFD, and CCR shall be cable entry through transit frames i.e. (MCT).    
2. The cables outside the building shall be direct buried for a distance of at least 2 meters. (Direct buried cables and conduits shall be installed in a single layer, except where rearrangement is necessary at transitions to multi-layer concrete encased duct banks or for entering buildings).
3. Multi-conductor cable penetrations shall be made with intact cable jackets.  If individual conductors are required to be sealed by other International standards or Saudi Aramco standards, the sealing shall be done at the most convenient location inside the building.
4. Multi Cable Transit (MCT) is a block system which provides sealing for cable penetration from hazardous area to non-hazardous area (such as from field to Control Room) and cable penetration through gas tight or fire walls.
5. Multi Cable Transit (MCT) also provides protection from fire, smoke, water, gas, chemical liquid and pressure at the point where cables penetrate building walls and floors.
6. Multi Cable Transit (MCT) mainly comprises of frame, sealing block module, stay plate and wedge.
7. Frame is the housing into which the blocks, stay plate and compression unit are fitted.
8. Sealing block module is an adaptive module, which is to hold cable. Some type of block has a unique feature to fit the cable by peeling the layers from the core of the seal to suit the cable size.
9. Stay plates are placed between rows of modules to prevent the possibility of module pull out.
10. Wedge as compression unit which applies pressure to the assembly sealing block and stay plate creating an airtight seal.
11. MCT Frame shall be bonding to the service equipment or grounding electrode system.
12. At the entry point of the MCT (outside PIB/AFD/CCR) a cable marker shall be installed, SS316 with permanently marked alphanumeric characters i.e. raised or stamped characters.