Answer / protagonist

A human body can withstand a current of 10ma to 11ma. Above
11ma it may be dangerous or may lead to severe shock.

Answer / hussain

current greater than 15 mA can cause death. this why hand
held tools are 42 V or 110V ac with centre tap ( means 55
V ) and human resistance at 50V is 4000 ohms and that
produces 12.5 mA ( less than 15 ma).
Most ideal to use is 42 V where human reistance is 4200
ohms resulting in 10 mA the safest.

Answer / shailesh

It is 50mA, and for human safety, Mostly we are using 30mA
ELCB or RCCB in the circuits.

Answer / prakash

Human body can with stand upto 30 mA of current . If the person is obese his sustainning capacity is less than 30ma for slim person it will be upto 40 ma.

bit confused - am i correct in thinking that to determine line to line voltage in a star config 110v 3 phase 4 wire distribution system i would use a voltmeter? I have a circuit configured as an unbalanced load, consisting of three incandescent lamps (1x40w, 1x60w, 1x100w - all 110v rated)connected in a star configuration to a 110v 3 phase 4 wire distribution system. I want to find out what types of meters i would use to obtain: a) each line to line voltage b) the line to neutral voltage across each load c) current flowing in each line and load d) current flowing in the neutral conductor e) power supplied to the loads im assuming i would be using ammeters in series along each line and voltmeters in parallel across each line to neutral? Also how could i predict these meter readings before taking them and with which formulae? Any help would be greatly appreciated A.

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