DCI Copper Installation 5

Question 1

What is the minimum separation distance between copper data cables and electrical conduit carrying circuits of 2–5 kVA in open runs?

Accepted Answer

5 inches

Answer

ANSI/TIA-569 requires a minimum 5-inch (127 mm) separation between data cables and electrical conduit carrying 2–5 kVA to prevent EMI.

Question 2

What test verifies that each pair in a copper cable has approximately the same propagation delay?

Accepted Answer

Propagation delay skew

Answer

Propagation delay skew measures the difference in signal travel time between the fastest and slowest pairs, which must be within 45 ns for Cat6/6A.

Question 3

A technician is pulling Category 6A cable in a conduit. The conduit fill is already at 40%. What should the technician do?

Accepted Answer

Install a larger conduit or a parallel conduit run

Answer

NEC and TIA-569 limit conduit fill to allow cable pulling without damage; at 40% fill adding more cable would exceed limits and risk damaging all cables.

Question 4

When testing a newly installed copper link, a 'FAIL – Return Loss' result most likely indicates what problem?

Accepted Answer

Impedance discontinuities caused by kinks, tight bends, or bad terminations

Answer

Return loss failures are caused by impedance discontinuities in the cable path, such as kinks, excessively tight bends, over-tightened cable ties, or poor terminations.

Question 5

What is the function of a gel-filled splice case in copper outside plant (OSP) installations?

Accepted Answer

To protect copper splice joints from moisture ingress

Answer

Gel-filled splice cases enclose and seal copper cable splices in outdoor environments, preventing water intrusion that would degrade performance or cause shorts.

(DCI) Data Cabling Installer Practice Test

(DCI) Data Cabling Installer Practice Test

DCI Copper Installation 5