Electrical shock and overload protection
Electric shock normally caused either touching conductive part that
is normally live, touching exposed conductive part made live by
a fault.2
0.1).15
0. Similarly, person contact with 400V must released in
15ms avoid being harmed.
10 80100
Voltage (volts) 230V 400V
150 200 300 500
15ms
40ms
0.5
0.8
1
2
3
4
6
8
10
20
40
30
Danger zone
Safe zone
Time
(seconds)
FIGURE 6.05
0.04
0.03
0.
Supplementary bonding described Chapter this book.4
0.Basic Electrical Installation Work
134
A permanent label must also fixed visible position near the
point connection the bonding conductor with the words ‘Safety
Electrical Connection Not Remove’ (IEE Regulation 514.1
0.06
0. 6.8 shows that person contact
with 230 must released from this danger harmful effects are
to avoided.01
0.3
0.
.02
0.6
0. The touch voltage curve Fig.8
Touch voltage curve.13.08
0
