electrical ideas

1. SOKOINE UNIVERSITY OF AGRICULTURE
DEPARTMENT OF AGRICULTURAL ENGINEERING
AND LAND PLANNING
AE 110: WORK SHOP TRAINNING
Electrical Training
DOTO, MUSA GESE
IWR/D/2016/0011
Instructor:Eng Catherine kilasara
DATE OF SUBMISSION:MONDAY,10th
April 2017

2. QN: How much current can kill human being?
Answers:
The amount of damage done by the electric shock depends not only on the magnitude of the
current, but it also on which portions of the body that the electric current is flowing through. The reason
for this is that different parts of the body have difference resistances, which can lead to an increase in
current. The following are effects of electrical current on the body: 1-4mA cause just faint tingles, 5mA
the slight shock felt it’s not painful and most of people can let go however strong involuntary movement
can causes injuries. 6- 40mA causes painful shock then muscular control is lost therefore this is the
range where freezing currents start and it may not be possible to let go. 50-150 milliamps cause
extremely painful shock, respiratory arrest (breathing stops), and severe muscle contractions. Flexor
muscles may cause holding on, extensor muscles may cause intense pushing away. Death is possible.
1,000-4,300 milliamps (1-4.3 amps) Ventricular fibrillation (heart pumping action not rhythmic) occurs.
Muscles contract, nerve damage occurs. Death is likely. 10,000 milliamps (10 amps) Cardiac arrest and
severe burns occur. Death is probable.