Yes the wiggy was between an ungrounded conductor and non-current carrying metal parts.
Originally Posted by mull982
I am not sure what resistance is normally used for these types of calculations. The current will be limited by the impedance of the path and the available voltage. I think it would be almost impossible to get 100s of amps to flow through a person.
Is 500ohms a typical value that is used for the human body for such rough calculations? I thought I have seen this number used somewhere before?
So using this resistnace value the maximum current that will flow through the body at 277V will be about .554A? I have heard others state that 100's of amps would flow through body which I never chose to believe.
Yes the impedance only comes into play when there is enough current flowing that it limits the amount of current that can flow. With a person as the load in the circuit you only look at the voltage across the person and the impedance of the path through the person. The impedance of the system itself does not enter into this.
Does the impedance of the system then only come into play for a bolted fault condition? For such faults with a fault resistance there is no need to consider upstream impedance? Therefore shock would be that same at 480V MCC bus as it would at a 480V lighting circuit?
The code only applies to T&M work....it does not apply to contract work.