Conductive dust
NOTE: Applies to data center and non-data
center environments.
Air must be free of conductive dust, zinc whiskers,
or other conductive particles.
Corrosive dust
NOTE: Applies to data center and non-data
center environments.
• Air must be free of corrosive dust.
• Residual dust present in the air must have a
deliquescent point less than 60% relative
humidity.
Table 22. Gaseous contamination specifications
NOTE: Maximum corrosive contaminant levels measured at ≤50% relative humidity.
Copper coupon corrosion rate
<300 Å/month per Class G1 as defined by ANSI/
ISA71.04-1985.
Silver coupon corrosion rate
<200 Å/month as defined by AHSRAE TC9.9.
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