Page 13 - paruzzi-magazine-en-23

voltage drops

With the 6 V installation it all

gets a bit worse when the con-
nections are not in good condi-

tion. For starters there is only

half of the voltage available to
the ignition coil, starter motor, ...

to power them. So any voltage

loss will be felt more strongly in

a 6 V installation.

Another problem with 6 V in- In 6 V installations, the current

stallations is that twice as much is greater to develop the same
current is needed to develop the power, so the conductors (elec-

same power, as can be seen in tric cables) must be thicker to

this formula: offer less resistance.

Voltage losses will also generate
P = U x I
extra heat. If we take again that

If the voltage U is half, namely 1.1 Ω from our previous exam-

6 V instead of 12 V, then the cur- ple, this extra resistance would
rent must be twice as large to consume about 1 W of power.

develop the same power. The So all the connections together

power required from the starter form a loss of 1 W with the corre-

motor to run the engine remains sponding unnecessary heat.
the same, as well as the power

required from the ignition coil,

whether it is 6 V or 12 V (well,
about the same).

Paruzzi Magazine 23 13

CLASSIC CAR PARTS