E&I QA QC

Electrical QC Notes of Saudi Aramco Part-3

101. What is chapter 4 in National Electrical Code (NEC)?
Ans. Equipment for General Use
102. What is chapter 5 in National Electrical Code (NEC)?
Ans. Special Occupancies
103. What is chapter 6 in National Electrical Code (NEC)?
Ans. Special Equipment

104. What is chapter 7 in National Electrical Code (NEC)?
Ans. Special Conditions
105. What is chapter 8 in National Electrical Code (NEC)?
Ans. Communication Systems
106. What is chapter 8 in National Electrical Code (NEC)?
Ans. Tables
107. In what article of the National Electrical Code (NEC) for Class 1, Class 2 and Class 3 Remote Control, Signaling and Power-Limited Circuits?
Ans. Article 725
108. What is the minimum pad mounting installation requirement of switchgear equipment placed a top level of a concrete above natural grade?
Ans. 100 mm
109. What is the minimum working clearance on all side of a switchgear?
Ans. 2 Meters
110. What is the minimum working clearance on equipment having doors or access panel?
Ans. 3 Meters
111. What are the switchgear outdoor enclosure requirements with in the perimeter of process unit?
Ans. NEMA 250/NEMA ICS 6 type 4, or NEMA type 3 Manufactured copper free cast aluminum (0.4 of 1% Max.) or IEC 60529 type IP66
112. What are the switchgear outdoor enclosure requirements outside the perimeter of process unit?
Ans. NEMA Type 3 or 4 0r IEC 60529 Type IP54
113. What is the enclosure requirement in outdoor Plant and other industrial areas located in severe corrosive environment?
Ans. NEMA Type 4X
114. Switchgear Bus shall be tested for insulation resistance test with a 1 Minute test (Phase to Phase and Phase to Ground) with KV Megohmmeter?
Ans. 1 KV
115. What term when the maximum current, in amperes, that a conductor can carry a continuously under the conditions of use without exceeding its temperature rating?
Ans. Ampacity
116. What does it mean if you are acceptable to the authority having jurisdiction?
Ans. Approved
117. A device intended to provide protection from the effects of arc faults by recognizing characteristics unique to arcing and by functioning to de-energized the circuit when an arc fault is detected?

Ans. Arc-Fault Circuit Interrupter (AFCI)

118. A generic term for a group of nonflammable synthetic chlorinated hydrocarbons used as electrical insulating media?
Ans. Askarel
119. It is connected to establish electrical continuity and conductivity?
Ans. Bonded
120. A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected?
Ans. Bonding Conductor or Jumper
121. The connection between two or more portions of the equipment grounding conductor?
Ans. Bonding Jumper, Equipment
122. A device designed to open and close a circuit by non-automatic means and to open the circuit automatically on a predetermined over current without damage to itself when properly applied with its rating?
Ans. Circuit Breaker
123. A device or group of devices that serves to govern in some predetermined manner, the electric power delivered to the apparatus to which it is connected?
Ans. Controller
124. A conductor having no covering or electrical insulation what so ever?
Ans. Conductor Bare
125. A separate portion of a conduit of tubing system that provides access through a removable covers to the interior of the system at a junction of two or more sections of the system or at a terminal point of the system?
Ans. Conduit Body

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Electrical QC Notes of Saudi Aramco Part-2

51. What is the minimum Thickness of a cable tray?
Ans. 1 mm
52. What is the minimum elevation of a cable tray above the main substation floor from the bottom of the lowest interior?
Ans. 2.67 Meter
53. What is the minimum clear space distance above the cable tray?
Ans. 300 mm
54. What should be the minimum support distance of a cable tray?
Ans. 600 mm
55. What type of terminal block to be used for all field instruments connection requirements?

Ans. Screw type terminal block
56. How many percentage minimum spare circuit breakers requirements for a furnished distribution panels?
Ans. 20%
57. What is the minimum size of bonding jumpers copper wire and connected to a Safety ground bus?
Ans. 4 mm²
58. What is the minimum size of two copper bonded conductors and connected from The safety ground bus to a single tie point on the safety ground grid in a closed loop configuration?
Ans. 25 mm²
59. For lighting system what is the type of Photocell Switches required?
Ans. Twist lock
60. What is the measurement requirements of Flood Lights installed on steel tower with steel platform from lights to platform?
Ans. 1.5 Meter
61. What type material being used for Lighting Poles in a process Area?
Ans. Hot-Dipped Galvanized Steel
62. What is the international reference standard for Lighting design?
Ans. IESNA RP-7
63. What is the international reference standard for lighting design of parking facilities?
Ans. IESNA RP-20
64. What are the voltages required designs for single phase 3 wires lighting system?
Ans. 120/240 Volts
65. What are the Lighting pole wiring compartment height requirement from the base?
Ans. 150 mm nor more than 900 mm
66. What is the Installation distance of Lighting Poles installed from roads having speed limit access of 50 km/h and up to 65 km/h?
Ans. 5 Meters
67. What is the minimum time duration of emergency lighting?
Ans. 1½ Hrs.
68. What is the minimum depth burial requirement of direct buried cable for 600 Volts and below?
Ans. 610 mm
69. What is the minimum depth burial requirements of direct buried cable for 600 Volts and below in a direct buried PVC. Sleeve or Duct bank?
Ans. 460 mm
70. What is the minimum depth burial requirements direct buried cable for 600 Volts to 35 KV?
Ans. 920 mm
71. What is the minimum depth burial requirements direct buried cable for 600 Volts to 35 Kv in a direct buried PVC. Sleeve?
Ans. 610 mm
72. What is the minimum depth burial requirements direct buried cable for 600 Volts to 35 KV. In a Duct Bank?

Ans. 460 mm
73. What is the minimum depth burial requirement of direct buried cable for over 35 KV?
Ans. 1070 mm
74. What is the minimum depth burial requirement for direct buried cable for over 35 KV. In a direct buried PVC. Sleeve?
Ans. 760 mm
75. What is the minimum percentage requirement of spare ducts for the duct banks?
Ans. 20%

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Electrical QC Notes of Saudi Aramco Part-1 

1. What is the minimum size of control cable in a multicore type of conductors in Saudi Aramco Engineering Standard?
Ans. 18 AWG
2. What is the minimum size of control cable in a single core type of conductor in Saudi Aramco Engineering Standard?
Ans. 16 AWG
3. What are the minimum size of control cable conductor rated 600 Volts and Below in Aramco Standard?
Ans. 2.5 mm² or 14 AWG
4. What is the minimum size of power conductor rated 600 V. and Below in Aramco Standard?
Ans. 4 mm²
5. What is the minimum size of power conductor rated 5 KV. in Aramco Standard?
Ans. 10 mm²
6. What is the minimum size of power conductor rated 15 KV. in Aramco Standard?
Ans. 35 mm²
7. What is the minimum size of power conductor rated 35 KV. in Aramco Standard?
Ans. 50 mm²
8. What is the minimum size of power conductor rated 69 KV. in Aramco Standard?
Ans. 120 mm²
9. What is the maximum size of power conductor rated below 69 KV?
Ans. 500 mm² or 1000 Kcmils
10. What is the minimum requirement of a grounding grid conductor in Saudi Aramco Standard?
Ans. 75 mm²
11. What is the minimum requirement of a ground conductor from equipment to grid in Aramco Standard?
Ans. 25 mm²
12. What is the minimum size requirement of a conduit in Aramco Standard?
Ans. ¾ Inch.
13. What are the maximum percentage requirements of a conductor crossing in a junction?
Ans. 40%
14. What are the minimum spacing requirements of a power and control conduit?
Ans. 150 mm
15. What are the minimum spacing requirements of an underground power and control cables?
Ans. 300 mm
16. What are the maximum required support distances of a GRS conduit?
Ans. 3.0 Meter
17. What is the minimum distance requirement of a conduit fastening?
Ans. 900 mm

18. What is the minimum sand bedding requirement of a directly buried cable trench?
Ans. 150 mm
19. What is the minimum sand filling requirement after cable laying?
Ans. 300 mm
20. What is the minimum required distance of underground cable warning marker post in a straight situation?
Ans. 30 Meters
21. What is the minimum required length of a grounding rod?
Ans. 2.4 Meters
22. What is the minimum diameter requirement of copper or copper jacketed steel grounding rods?
Ans. 16 mm
23. What is the minimum diameter requirement of galvanized steel grounding rods?
Ans. 19 mm
24. What Class of a circuit that complying with NEC Article 725, Part II?
Ans. Class 1 Circuit
25. What Class of a circuit that complies with NEC Article 725, Part III?Ans. Class 2 Circuit and Class 3 Circuit

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