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	Subject - electrical field isolation bigjohn_1953 I have a question for anyone that can help. I had a heart attack in Dec. last year. I have to have all my electrical motors on my woodworking tools isolated so there's no field to give me shock from my defibrillator that's in my chest. Is there a way to do this? any help would be good. JimmyDee It looks like, from your name, you might be 10 years younger than me. I now feel a little lucky because after my heart attack I didn't have to deal with the electronic stuff in my chest. I don't have the answer for you but I was under the impression only a microwave was a problem with a defibrillator or pace maker. I will wait to see if some on here has some input that will help answer your question. Are you trying to shield the magnetic field by isolating or the radiant energy produced from the switch opening when turning off the power? Welcome to the Electrical Knowledge site and hope you question will be answered. Jim bigjohn_1953 Thanks Jimmy Dee, However,what the doctors tell me is that a large electrical field can cause the defibrillator to think that my heart has stopped giving it the sign to react,which from what they say is a one second kick in the chest to get my heart to go back to normal. microwaves no longer give this affect to this life saving devise. I was told it is possible to buy shields that you put over the motor and then put the shield to ground . But ,at the same time I don't know if the motors I have has a strong enough field to cause this and I'm not ready to turn them on to fine out yet. so,thanks for your help and if you fine anyone with this info let me know. JimmyDee I found a site and these are some of the precautions for your situation: CLICK HERE to go to that site. Another good site Information on mag shielding (1)Always consult your physician prior to any strenuous activities and visit your physician on a regular basis. (2)If you travel by air inform the security forces prior to being scanned by any hand held security scanners. (3)Avoid any strong magnetic fields including any concentration of magnets. (4)Communicate with and inform all medical personal about your condition, verbally and with an ID card letting others know that you have an implantable defibrillator. It looks to me like the one of concern with your question is #3. It appears your Dr.'s concern is with the magnetic fields produced by the motors. I can tell you right off, do not use tools that have their motors encased in plastic cases. I have a grinder and a drill motor that have plastic, double insulated cases and would think this would not be good for you. By encasing a motor is a soft iron cover that was bonded to the case and your case grounded would probably do what you needed it to do. I am going to do some research on totally enclosed motors and see what type of stray magnetism is dissipated by these devices. Please keep in mind, I know nothing about the device you are using and I am not making any type of recommendation about what you need to do to use this equipment. Jim ladyestrogen My Dr. told me in 1999 that I should have a pacemaker-type unit installed to stop a dangerous arythmia (sp?) that I have. I refused, thinking if I got hit on a job even house voltage could kill me. Because of what you said, now I am doubly glad I didn't. My grandfather just had a pacemaker installed, and he uses his metal-working tools all the time. I had no idea it could be a risk, and I don't think he knows either. Can you please let me know what you find out? -Ladyestrogen