Raritan PX3-4000 series, User Manual

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Chapter 9: In-Line Monitors
509
Plug Selection
If a plug is to be attached to the flexible cord, the plug’s rated ampacity is
chosen as follows:
 In the United States, as specified in UL 60950-1, the plug’s rated
ampacity must be 125% greater than the Raritan product’s rated
ampacity. In some Raritan products, such as 35A 3-phase delta
wired PDUs, an exactly 125% rated plug is not available. In these
cases, choose the closest plug that is more than 125%. For example,
a 50A plug is the closest fit for a 35A 3-phase PDU.
 For all other locations, subject to local regulatory agency policy, the
plug’s rated ampacity is the same as the Raritan products rated
ampacity.
Receptacle Selection
For Raritan in-line monitors, any receptacle fitted to the outlet flexible
cord must have identical ratings as the plug attached to the inlet flexible
cord.
Derating a Raritan Product
Lower rated plugs, receptacles and flexible cords may be connected to a
Raritan product. This results in a derated (reduced) ampacity rating for
the product.
Derating guidelines:
1. Choose the plug and use its rated ampacity to determine the derated
ampacity.

In the United States, as specified in UL 60950-1, the derated
ampacity is 80% of the plug’s rated ampacity. For example, a
30A plug would result in a derated ampacity of 24A.

In other geographic locations, subject to local regulatory agency
approval, the derated ampacity is the plug’s rated ampacity.
For example, using a 16A plug would result in a derated
ampacity of 16A.
2. The derated ampacity must be marked on the Raritan product so the
new reduced rating can be easily identified.
3. For in-line monitors, the receptacles used must have the same
voltage and ampacity rating as the plug chosen in step 1.