What's the RECOMMENDED twisted pair cable slack length to be left at the work area outlet location to enable the possibility of future changes in the Horizontal Cabling System?

Question

Options

• A= 0.152 m (0.5 ft)
• B= 0.3 m (1 ft)
• C=1 m (3 ft)
• D= 5m (16 40 ft)

• A
  7% (3)
• B
  77% (34)
• C
  14% (6)
• D
  2% (1)

Explanation

Option B (0.3 m / 1 ft) is correct because the TIA/EIA-568 standard specifically recommends leaving approximately 0.3 m (1 ft) of slack at the work area outlet - enough to allow future reterminations, moves, or adjustments without needing to pull new cable.

Why the distractors are wrong:

• A (0.152 m / 0.5 ft) is too short - barely enough to reterminate a connector once, leaving no practical margin for future changes.
• C (1 m / 3 ft) is excessive for the outlet end and would waste cable while potentially bunching up inside the wall box, causing signal degradation.
• D (5 m / 16.4 ft) far exceeds any reasonable slack allowance and would eat significantly into the 90 m horizontal cable limit, possibly violating channel length specifications.

Memory tip: Think "1 foot = future-proof." The single foot of slack at the outlet is the standard's minimum practical buffer - just enough to re-punch or replace a connector without touching the rest of the run. If you remember "one foot at the outlet," you've got it.

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