ground connectors

Hostmaster Hostmaster at
Fri Jun 8 03:49:19 CDT 2007

Hi Rob,


Assuming I am understanding your reference to internal and external frames
correctly, I would get the PDU's and the cab individually grounded to earth,
however I thoroughly suggest that you consult a qualified electrical engineer if
not 100% certain of what you are doing. If an electrical fault develops and
things aren't as they should be, the results will either be: 


a) Expensive,

b) Fatal, or 

c) a combination of a) and b) 


I certainly wouldn't leave things un-earthed, not only from a safety point of
view, but from a technical perspective as well - I recently had some very
difficult to diagnose issues with a KVM which turned out to be a ground fault!

Best Regards, 

Richard Garner (A+, AMBCS, MOS-O) 


From: rchamberland [mailto:rchamberland at] 
Posted At: 07 June 2007 17:14
Posted To: Microsoft Office Outlook Embedded Message
Conversation: ground connectors
Subject: ground connectors


This may be slightly off topic, I apologize if it is.


I've just installed a bunch of PE2950's on a non-Dell el cheapo 12U rack
enclosure which doesn't have an internal and external frame.  I'm also putting
in a number of Dell PDU's which will be powered by a 2200VA UPS.  The PDU's have
a threaded grounding hole to which a ground wire is to be attached.  The PDU
manuals assume a Dell rack enclosure and want the PDU ground wires attached to
the external frame of the enclosure.


I'm not an electrical engineer but perhaps some of you may have experience with


1) What should I attach the ground wires to if I don't have an external frame on
my rack enclosure?


2) Is it assumed that the frame is to be grounded too?


Any suggestions would be greatly appreciated.


Rob Chamberland









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