Cable Installation

Question 1

What is the definition of a Confined Space?

Answer 1

A confined space can be any space which is substantially, but not always entirely enclosed where there is a risk of death or serious injury from hazardous substances or dangerous conditions e.g. a lack of oxygen.

Question 2

Name four examples of a Confined Space?

Answer 2

Chamber, 
Tank, 
Vat, 
Silo, 
Pit, 
Trench, 
Pipe, 
Sewer, 
Flue, 
Well,
Other similar space in which, by virtue of its enclosed nature.

Question 3

What are the four principles of a Safe System of Work?

Answer 3

• Planned
• Organised
• Performed
• Maintained and revised as appropriate so as to be, so far as is reasonably practicable, safe and without risk to health.

Question 4

What is the maximum period a Permit to Work can be issued for?

Answer 4

Until the end of the shift or 8 hours.

Question 5

What training is required to undertake Confined Spaces work?

Answer 5

CS Training which is suitable and sufficient information, instruction.

Question 6

What are three responsibilities of the Person in Charge of a Confined Spaces task?

Answer 6

Control the entry into a confined space,
Raise an emergency rescue plan,
Raise a Risk Assessment.

Question 7

What four pieces of documentation is associated with Confined Spaces work?

Answer 7

• Hazard and Work Risk Assessment
• Safety Programme (Method Statement)
• Permit to Work
• Standing Instructions

Question 8

Under what circumstances should a Person in Charge enter a Confined Space?

Answer 8

Under No circumstances

Question 9

What are the responsibilities of the Work Team?

Answer 9

a. Work to the PiC in accordance with the safety rules and procedures and any agreed Standing Instruction or Permit to Work.
b. Take reasonable care in the promotion of the health and safety of themselves and of any other person who may be affected by their actions or omissions
c. Only use equipment for which they have been trained and in the manner in which they have been trained
d. Report to the PiC any defects found in the tools, plant and equipment to be, or being, used in the works
e. Where more than one member of a Work Team enters a confined space, one person is to be nominated by the PiC to lead the entry team and be in direct control of their activities in the confined space. This function is separate from the PiC role.

Question 10

Under what circumstances would a Standing instruction be used?

Answer 10

A Standing Instruction (SI) can be used for a one off task or repeat tasks and can be issued for a period of up to 12 months after which point it will be reviewed by the AP(CS).

Question 11

Under the Health and Safety Regulations, what is required to be displayed when working within Confined Spaces?

Answer 11

Safety Signage;

Question 12

Which Joint Service Publication can you find additional information relating to Confined Spaces?

Answer 12

• JSP 375, Part 2, Vol 1, Chap 28 Confined Spaces

Question 13

What factors should be considered prior to conducting an installation task?

Answer 13

• CIDA/SCIDA Compliance
• Gas Testing (if work involves confined spaces).
• Bonding and Grounding.
• Fire Stopping.
• Installation techniques for the optical fibre.

Question 14

The abbreviation CIARFRE is used to ensure MOD Installation Standards are achieved, what does this stand for?

Answer 14

Confidentiality.
Integrity. 
Availability. 
Resilience.
Flexibility. 
Economy.

Question 15

BS 50173-1 states there are four phases for the successful installation of information technology cabling, state the four phases?

Answer 15

• Design.
• Specification.
• Installation.
• Operation.

Question 16

When conducting gas testing of an enclosed space, where should test be conducted with the gas tester?

Answer 16

Outside Top
Inside Top
Middle
Bottom 
any Ducts

Question 17

Define the Bonding and Grounding of external cables?

Answer 17

Bonding;

Bonding is the process whereby electrical conductors are connected together to equalise the potential difference across components

Grounding;

Grounding is the process whereby conductive equipment is connected to a ground electrode to dissipate any potential difference to earth.

Question 18

What four elements often cause breaches to the building’s Fire Resistant Elements?

Answer 18

• Risers
• Containment
• Cables
• Pipes

Question 19

State four products that can be used as fire stopping materials?

Answer 19

Fire Stop Collars;
Fire Stop Bricks;
Fire Stop Plugs;
Fire Stop Pillows;
Tapes and Putties

Question 20

State four factors that should be considered when installing optical fibre cabling?

Answer 20

• Fibre stress
• Bend radius
• Mechanical strength
• Cable ties
• Spare cable
• Cable labelling
• Cable end protection
• Pits and Ducts

Question 21

How is the minimum bend radii calculated of an optical fibre cable?

Answer 21

The minimum bend radii is 4x the diameter of the outer jacket.

Question 22

When working in cable pits, at which locations should a cable be labelled?

Answer 22

As they enter and leave each and every bore.

Question 23

What media should be installed within a cable pit?

Answer 23

Multimode, Singlemode and Coaxial Cable.

Question 24

Why are pits and ducts network the preferred method when installing external cabling?

Answer 24

For the preservation of data confidentiality, availability and integrity.

Question 25

On which occasions and by who’s agreement can an aerial system such as catenaries be used when installing external cabling?

Answer 25

An aerial system for external cable infrastructure is therefore only to be considered under the most exceptional circumstances, and then, only with the agreement of the relevant SCIDA or CIDA.

Question 26

What is the maximum interval of a cable pit?

Answer 26

100 metre intervals,

Question 27

What distance should a pit be located to a Building Entry Point?

Answer 27

Normally within 5 metres

Question 28

Each duct should provide how much spare capacity to afford future installations?

Answer 28

Each entry duct shall provide 50% spare capacity, or approximately 12 cables and shall be sealed at both the Building Entry Facility (BEF) and the cable chamber pit.

Question 29

Ducting within pits adjacent to building entry points and within the building should be what on completion of the installation task?

Answer 29

???Sealed???

this is a guess?

Question 30

State five different types of installation equipment?

Answer 30

• Duct ropes
• Duct rod
• Fused swivel
• Fibre socks
• Turning wheels
• Cable guide
• Fleeting technique
• Capstan winch
• Rollers and Jacks
• Lubricant
• Communication.

Question 31

Explain the process and reasons for “Fleeting” cable?

Answer 31

If there are no suitable turning wheels available on a bend then enough cable should be pulled through and fleeted to complete the route. Make sure that the figure of eights are large enough and spread the cross-over points to avoid stress on the cable.

Question 32

Explain the term “Rainbow Cable”?

Answer 32

SDIP 29 states the RED and BLACK information should not be transmitted within the same multicore fibre optic cable. However, operational theatres, as part of the backbone ICT infrastructure, have introduced a 144 core fibre optic cable (commonly referred to as Rainbow cable) to carry all security classifications of data.