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  1. #1
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    Capacitance between human body and all 110-V wiring in a 10'x10' room

    Human body picks up 60-Hz noise from main supply 110-v wiring in rooms. It should be from electrostatic mode coupling.

    Is there any article estimated how much parasitic C is between human body and the wirings? Or estimate how much 50-60 Hz voltage noise will human body normally carries in a regular living space?

    Regards,
    Neo

    •   Alt12th August 2017, 19:42

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  2. #2
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    Re: Capacitance between human body and all 110-V wiring in a 10'x10' room

    It's about 20 to 100pF depend on the environment (more metal objects around - 100pF)



    •   Alt12th August 2017, 20:43

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  3. #3
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    Re: Capacitance between human body and all 110-V wiring in a 10'x10' room

    Quote Originally Posted by luben111 View Post
    It's about 20 to 100pF depend on the environment (more metal objects around - 100pF)
    I believe it is the entire C from human to earth, like in HBM model.

    I am more curious about partially to wiring of 110v main supply only?



    •   Alt12th August 2017, 23:11

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  4. #4
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    Re: Capacitance between human body and all 110-V wiring in a 10'x10' room

    I just did one of my favorite tests with my oscilloscope. Touching my finger to the signal lead only, I see 2V amplitude of 60 cycle hum. (This is in a normal apartment residence with some appliances running.)

    Since the scope has 1 megohm input impedance, it implies 2uA of current traveling through my body. Supposedly I pick this up via capacitance from house wiring. There are the basic raw calculations if you are looking for a Farad value. Probably in the pF range as suggested in post #2.


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