4
2.1) Equipotential connection and earthing system
2.1.1) Earthing the pump
Between the pump and earth there must be a connection with an earth conductor.
For this purpose a
Cembre
earth cable must be used. This earthing device is availble as an optional
accessory (Part. no
EK 100
).
One end of the earth cable must be connected to the earth terminal of the pump, the other end
must be connected to the surrounding environmental potential (e.g. grate, steel sheet, etc.).
2.1.2) Earthing the cutting head
In
Germany
(see BGI 845) no earth conductor must be connected to the cutting head.
In some European countries, the earth connection is used to favour the intervention of single phase
short circuit protective devices.
For countries other than
Germany
contact the electricity supply utility.
Should it be needed, the earthing device, comprising a 5m long cable and an earth rod, may be
ordered from
Cembre
(Part. no
EK 500P
).
Whatever the case, the earthing device must be approved by
Cembre
.
For earthing the cutting head, proceed as follows:
– Unscrew the nut of the earth terminal on the head.
– Connect the 5 m earth cable to the cutting head and tighten the nut.
– Tighten the nut hard.
– Fully unwind the earth cable.
– Ram the earth rod deep into solid ground.
– Connect the cable to the earth rod and tighten the nut of the cable terminal.
n
ut
e
arthing
terminal
e
arth
Cable
(5
meters
)
C
utting
head
C
able
lug
`
ENGLISH
