RCDD Cabling Infrastructure and Pathways 3

Question 1

What is the recommended separation distance between telecommunications cables and fluorescent lighting fixtures to minimize EMI?

Accepted Answer

130 mm (5 in)

Answer

305 mm (12 in)

Answer

50 mm (2 in)

Answer

600 mm (24 in)

Question 2

In an underfloor duct system, what is the required minimum depth for a flush-mount service fitting?

Accepted Answer

Flush with finished floor surface

Answer

19 mm (3/4 in) below finished floor

Answer

25 mm (1 in) above the subfloor

Answer

13 mm (1/2 in) recessed below finished floor

Question 3

Which cable type is required for plenum (air-handling) spaces in the US per NEC Article 800?

Accepted Answer

CMP (Communications Plenum)

Answer

CMR (Communications Riser)

Answer

CM (Communications Multipurpose)

Answer

CMX (Communications General)

Question 4

What is the maximum weight load typically supported by a cable tray rated for medium-duty service?

Accepted Answer

50 lbs per linear foot

Answer

25 lbs per linear foot

Answer

75 lbs per linear foot

Answer

100 lbs per linear foot

Question 5

When routing cables through a fire-rated wall, what is required at the penetration?

Accepted Answer

A UL-listed firestop system rated equal to or greater than the wall's fire rating

Answer

A standard conduit sleeve with no additional treatment

Answer

Foam insulation packed around cables

Answer

A non-metallic bushing to protect cable jackets

Question 6

What is the purpose of a pull box in a long conduit run?

Accepted Answer

To provide an intermediate access point to reduce cable tension during pulls

Answer

To act as a grounding junction for the conduit system

Answer

To house intermediate splices for copper cabling

Answer

To filter EMI from adjacent electrical conduits