Potential Metallic Particulate Contamination - HP J class 3 Supplementary Manual

CAUTION
Figure 1-3
Chapter 1
PDU power limitations
To reduce the risk of overload, do not exceed the rated load of any single
PDU. In addition, do not load a single NEMA 5-15 (see Fig. 1-3)
receptacle with more than 15 Amperes and any single IEC 320-1/C13
receptacle with more than 10 Amperes. In general, make sure that the
power source circuits are able to safely provide the current that will be
required by all components drawing power from them. This document
assumes that 220V and 240V cables are used.
NEMA 5-15 Receptacle

potential metallic particulate contamination

Metallic particulates can be especially harmful around electronic
equipment. This type of contamination may enter the data center
environment from a variety of sources, including, but not limited to,
raised floor tiles, worn air conditioning parts, heating ducts, rotor
brushes in vacuum cleaners or printer component wear. Because metallic
particulates conduct electricity, they have an increased potential for
creating short circuits in electronic equipment. This problem is
exaggerated by the increasingly dense circuitry of electronic equipment.
Over time, very fine whiskers of pure metal can form on electroplated
zinc, cadmium, or tin surfaces. If these whiskers are disturbed, they may
break off and become airborne, possibly causing failures or operational
interruptions. For over 50 years, the electronics industry has been aware
of the relatively rare, but possible, threat posed by metallic particulate
contamination. During recent years, a growing concern has developed in
computer rooms where these conductive contaminants are formed on the
bottom of some raised floor tiles.
safety information
safety warnings
Do not load this
connector with
more than 15 Amps
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