ECS Electrical Wiring and Cable Installation 2

Question 1

Which cable type is specifically rated for direct burial underground installation?

Accepted Answer

UF-B (Underground Feeder)

Answer

UF-B cable is rated for direct underground burial because it has a moisture-resistant, sunlight-resistant outer jacket.

Question 2

Why are cables sometimes installed with armoring in electrotechnical work?

Accepted Answer

To protect against physical damage in industrial or hazardous environments

Answer

Armored cables (such as MC cable) have a metal sheath that protects the conductors from physical impact and abrasion in demanding environments.

Question 3

What is the purpose of cable trunking in an electrical installation?

Accepted Answer

To organize and protect multiple cables running along the same route

Answer

Cable trunking provides an organized raceway that protects, contains, and routes multiple cables neatly through a building.

Question 4

How should cables be identified in a multi-circuit electrical installation?

Accepted Answer

Using color-coded insulation and circuit labels or tags

Answer

Cables must be identified using standardized color codes and circuit labeling so that any electrician can safely identify circuits during maintenance.

Question 5

What is the function of a cable gland in an electrical installation?

Accepted Answer

To provide a secure, sealed entry point where a cable enters an enclosure

Answer

A cable gland clamps onto the cable sheath to provide strain relief and an IP-rated seal at the point where the cable enters a junction box or panel.

ECS - Electrotechnical Certification Scheme Practice Test

ECS - Electrotechnical Certification Scheme Practice Test

ECS Electrical Wiring and Cable Installation 2