Page 196 - Electrical Safety of Low Voltage Systems
P. 196
Extra-Low-V oltage Systems 179
FIGURE 10.11 Double-fault and indirect contact.
In FELV systems, while it is important to ground the ECPs, it is
not advisable to earth the secondary winding of the source, because
the accidental loss of protective conductors may cause hazardous sit-
uations under double-fault conditions (Fig. 10.12).
In the worst-case scenario, persons are exposed to a prospective
touch voltage equal to V G + V FELV .
FIGURE 10.12 Earth connection of the supply.
