Restrict personnel / equipment entering the work areaĥ.7. Place barricade and warning sign boards in applicable locations.
Conduit field offset or bend will be done as per approved field method.ĥ.6. Conduct job safety talk before starting the work.ĥ.5. All personnel involved in the activities shall wear complete personal protective equipment (PPE) in accordance with safe work requirements.ĥ.4. Ensure all applicable work permit is approved related to underground conduit duct bank installation.ĥ.3. Ensure that the JSA job safety analysis is approved prior to start the activity work related to duct bank.ĥ.2. SAES-P-100 Basic Power System Design Criteriaĥ.1. SAPOD : SAUDI ARAMCO POWER OPERATION DISTRIBUTION SAPID : SAUDI ARAMCO PROJECT INSPECTION DIVISION GAC E&I QC inspector ensure that the construction method of procedures is adhered to the ARAMCO standard with reference to approved project specifications. The scope covers the step to be followed for the installation of below grade concrete encased conduit duct bank installation for electrical, instrumentation and telecom works intended for permanent installation in the plant. The purpose of this QCP is to ensure that all works regarding below ground concrete encased conduit duct bank installation for instrumentation, electrical and telecom works and their fittings shall be done in accordance with the ARAMCO standards and all other applicable international codes and standards. However, since control, instrumentation and communication cables run in separate steel conduit which - if it will be well bonding could create, also, a grounding effective path for power cables in the same duct bank.QUALITY CONTROL PROCEDURE FOR CONCRETE ENCASED CONDUIT DUCT BANK INSTALLATION
However, in this case, grounding with individual cable ground conductors (see 5.5.3.2) should be considered to avoid installation and bonding complications." When the cable is run underground, this grounding conductor should be located in the same direct burial or duct bank run as the cable. It is important that the ground conductors be run as close as possible to the circuit conductors, since this reduces the reactance of the fault current return path. The separate grounding conductor is run in the same conduit or cable duct as the outgoing power cable and is also used to ground the conduit or cable duct. Where a single cable leaves the cable tray, a branch grounding conductor is added and connected to the common grounding conductor and to the equipment enclosure or motor terminal box. It is usually a bare stranded copper conductor connected to the main ground bus and fastened to the cable tray. A common equipment grounding conductor could be used for all cables in the same tray (it may also be used to ground the cable tray). From this main ground bus, a grounding conductor is run within the same raceway as the circuit conductors. It should be noted that in systems with impedance grounding, the grounding conductors should be connected to the neutral ground and not to the transformer neutral. This may be the switchgear or the motor control center ground bus to which the supply transformer neutral is connected (solidly or through impedance) and that is solidly connected to the grounding grid. "It is recommended that a main ground bus be provided.
I am sure it could be also in other standards however this is what I found in "my collection".įrom IEEE-665 GENERATING STATION GROUNDING 5.5.3.1 Grounding with common equipment grounding conductor run to the neutral ground.
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