IBM x3690 X5 Service Manual page 18

Attention: This server is suitable for use on an IT power distribution system
whose maximum phase-to-phase voltage is 240 V under any distribution fault
condition.
Important: Maschinenlärminformations-Verordnung - 3. GPSGV, der höchste
Schalldruckpegel beträgt 70 dB(A) oder weniger.
United Kingdom - Notice to Customers:
This apparatus is approved under approval number NS/G/1234/J/100003 for
indirect connection to public telecommunication systems in the United Kingdom.
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System x3690 X5 Types 7147, 7148, 7149, and 7192: Problem Determination and Service Guide