[R-390] R 390 problem

Gord Hayward ghayward at uoguelph.ca
Wed Mar 8 09:59:55 EST 2006


>  1.. Chassis is hot at 80 V AC


The line filters usually have caps from each side of the line to the chassis.
This acts as a voltage divider making the chassis hot either way the plug goes
in.  I've been zapped a few times by this and have had a computer interface
smoke too.  Thats also why some trip GFIs.  Make sure you have a good ground
connected.

Cheers, Gord.


-- 

Gordon L. Hayward, Ph.D., P.Eng.,
Associate Professor, Biological Engineering,
School of Engineering, University of Guelph,
Guelph, Ontaro, N1G 2W1.




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