1977-02 February IBEW Journal.pdf - International Brotherhood of ...

Use The Best Ground Available
A Rule To Live By
•
INDUCED VOLTAGE CAN KILL
1
FI ELD
CURRENT
When working on de.energized
conductors or equipment, some of
Ihe principal threots 10 the sofety of
the workman include:
1. Induced voltage.
2. Accidenlol energizing.
3 . lightning.
4 . Sialic eleclricity (chorge).
The margin of safety from these
will be increosed by good ground-
ing procedures.
Induced vo/toge con be Ihe result
of high curren I values in parallel lines
of any voltage or from high· ... oltage
transmission lines parallel 10 the deenergized
conductors being worked
on. Pictured above is Ihe lop revel
of 0 twin verticol circuit pole line. If
either of Ihe circuits is de-energized,
it may have a voltage induced in it
due 10 curren I in the other circuit.
Transmiuion lines con induce danger.
ausly high potentials even though
they may be carrying small currents.
Induced voltage is not and should
nat be referred to as static electricity.
Induced voltage on de-energized lines
is a result of air core transformer
coupling and is a source of electricol
power and can be used to light a
home, run on electric motor or kill
peopl e.
The teast understood threot is induced voltage
which - in error - is sometimes called static electricity