Electrical QC Course of Conduit and Cable Sealing Requirements

This article is about Electrical QC course based on Aramco standards, international standards and codes. This complete series consists of lot of MCQs and questions which are useful for QC interview and also CBT exam of Aramco. In this article we discuss about conduit and cable sealing requirements of electrical installation.

Electrical QC Course

Quiz on Quality Management System

1. What type of sealing fittings are not allowed for conduits according to the supplement to NEC Articles 501 and 502?

A) Barrier type
B) Conduit sealing
C) Non-barrier type
D) Flameproof

Answer: B

SAES-P-104 15.1 states that conduit sealing fittings shall not be used.

2. 2. Where should conduits that cross hazardous location boundaries terminate?

– A) Inside the building
– B) Below grade
– C) In the open air
– D) In the control room

Answer: C

SAES-P-104 15.2 specifies that conduits must terminate in the open air at both ends.

3. What type of cable glands are required for sealing cables entering enclosures as per the NEC?

– A) Non-barrier type
– B) Explosion-proof
– C) PVC conduit
– D) Non-sealed type

Answer: B

SAES-P-104 15.3 requires the use of barrier type cable glands with sealing compound, known as explosion-proof glands.

4. What material should be used for sealing conduits penetrating the wall of a building basement or underfloor space?

– A) Steel conduits
– B) PVC conduits
– C) Metal conduits
– D) Rubber conduits

Answer: B

SAES-P-104 15.4.1 specifies that penetration should be via short horizontal sections of PVC conduits.

5. How should the inside of PVC sleeves be treated to ensure safety?

– A) Left unsealed
– B) Sealed for fire retardancy
– C) Sealed with water-proof material
– D) Encased with metal

Answer: B

Paragraph 15.4.2 states the inside of the sleeves should be sealed to provide fire retardancy.

6. For how long should cables outside the building be buried?

– A) 1 meter
– B) 1.5 meters
– C) 2 meters
– D) 3 meters

Answer: C

SAES-P-104 Paragraph 15.4.3 specifies that cables outside the building should be direct buried for at least 2 meters.

7. What must be intact when making multi-conductor cable penetrations?

– A) Individual conductors
– B) Cable jackets
– C) Cable ends
– D) Cable insulation

Answer: B

SAES-P-104 Paragraph 15.4.4 specifies that multi-conductor cable penetrations shall be made with intact cable jackets.

8. Where should the sealing be done if individual conductors are required to be sealed by other standards?

– A) Outside the building
– B) At the control room
– C) At the most convenient location inside the building
– D) At the entry point

Answer: C

SAES-P-104 Paragraph 15.4.4 states the sealing should be done at the most convenient location inside the building.

9. What type of cable glands are not acceptable without sealing compound?

– A) Barrier type
– B) Non-barrier type
– C) Flameproof (EEx d) non-barrier type
– D) Explosion-proof barrier type

Answer: C

SAES-P-104 Paragraph 15.3 specifies that flameproof (EEx d) non-barrier type cable glands without sealing compound are not acceptable.

10. What should be done if cables or conduits entering buildings are required to be sealed by the NEC?

– A) They should be left unsealed
– B) They should be sealed using any available method
– C) They must meet the requirements of the NEC and paragraphs 15.1, 15.2, and/or 15.3
– D) They should be encased in metal

Answer: C

The commentary for paragraph 15.4 states that if sealing is required by the NEC, it must meet the NEC and specified paragraphs.

Electrical QC Course

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