Check this link for some interesting info on this subject (EMI). Please let us know of any interesting things you find out. http://www.fda.gov/cdrh/emc/emcref.html
As an interesting side note, This link came up in discussion that started off requesting information on known effects of electric wheelchair EMI on multiple sclerosis patients. Someone touched breifly on how the wheelchairs themselves have to be tested for effects from EMI
I also found it interesting that the manual specifically stated that the wheelchair also was compliant with a 20 V/M field from (IIRC) 30 MHz to 1000 MHz. That's nice, since personal electronic emitters (cell phones, PCS, handheld CB sets) typically generate about 5 to 10 V/M at about 1 to 2 meters distance. That increases the chances that the wheelchair user can safely use a cell phone without spinning in circles (or worse).
I hope that you don't mind this slight tangent.
[This message has been edited by Bill Addiss (edited 06-06-2001).]