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Azrinbme,
I’m not really familiar with IEC 601.1, but the requirements here in the US are specified by the NFPA (National Fire Protection Association) (http://www.nfpa.org/index.asp ) in the NFPA Code 99 (http://tinyurl.com/5wcgd2).
NFPA 99 states that acceptable leakage currents are <300 uA for Patient Care Areas and <500 uA for Non-Patient Areas (ie. labs).
I have come across lab equipment with higher than the acceptable 500 uA of leakage, a simple fix has been to install a redundant ground. To do this simple run insulated wire between the chassis of the unit and a grounding point such as the grounded outlet plate where you plug the unit in. When you do this you will find that the leakage will fall to a very low value… and dont be surprised if the leakage value return is 0 uA.
I hope this helps.
Thank you for your explanation. Just my doubt as you told to put extra wire between ground and chassis actually bypassing existing any bad resistance in chassis and ground. Actually testing leakage is to leakage on machine as it is without any modification. Just my 2 cents though.
For Lab equipments, the standard is IEC 61010 and not 601.1.
Thank you for correct me. I will appreciate if you provide details parameters to check electrical safety on ICE 61010
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Hi there..
I need a little help! In Malaysia we are using IEC601.1 parameters for electrical safety. Can you help seek information what parameters in IEC601.1 can used for lab equipment. We found that current leakage always failed for lab equipment.