4-3 Grounding
A WARNING
ELECTRIC SHOCK by leak can kill.
S Improper grounding may lead to death due to electric
“ T V
shock.
J 8 %
* Be sure to execute the grounding of the machine and the
load according to the local rule.
Grounding
Execute the grounding certainly to prevent the electric shock
by leak.
(1) Case grounding of the machine
Use the grounding wire which sectional area conforms to the
local rule.
Provide the grounding rod to satisfy the grounding resistance
which conforms to the local rule.
(2) Case grounding of the load
Execute the grounding for the load similarly. Provide the
grounding rod to satisfy the grounding resistance which
conforms to the local rule.
(3) Precaution in grounding
Ф Select a shady and highly moist place, and burry the
grounding rod in such way that its top end is completely
hidden in the ground.
© If burying the grounding rod on the place that many
pedestrians walk on, clamp the lead wire to prevent
catching on it.
© If the lead wire is not long enough for the connection,
connect it as directed below:
(1) Connect the lead wire and the extension wire by
soldering or sleeve coupling securely and apply
insulating tape to the connection.
(2) Do not burry the connection in the ground.
@ Avoid burying of grounding rod within 2m of grounding
location for lightning conductor.
(D Do not use a telephone set grounding conductor.
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