Which standard ensures physical compatibility between racks, enclosures, and rack mounted equipment?

Question

Options

• ARoHS
• BEIA-310
• CNFPA 70
• DASTM A653

• A
  4% (2)
• B
  82% (46)
• C
  4% (2)
• D
  11% (6)

Explanation

EIA-310 is the Electronics Industries Alliance standard that defines the physical dimensions for racks, enclosures, and rack-mounted equipment - including mounting hole spacing, rack unit (U) height increments, and width specifications - ensuring that equipment from different manufacturers fits and mounts compatibly. RoHS (Restriction of Hazardous Substances) is an environmental directive limiting dangerous materials like lead and mercury in electronics, not a physical compatibility standard. NFPA 70 is the National Electrical Code governing electrical wiring and safety in buildings, unrelated to rack dimensions. ASTM A653 is a materials specification for galvanized steel sheet, covering coating and mechanical properties rather than equipment form factors.

Memory tip: EIA-310 governs the "310 rack" - the standard 19-inch rack you see in nearly every data center. If you remember that EIA sets the rules for rack dimensions, you can reliably connect EIA-310 to physical rack compatibility on the exam.

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