nvent ERICO System 3000, Инструкция по установке, эксплуатации и обслуживанию, Страница: 47 / 56

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To Upper
Termination
2 . 5 mm
2
( 12 AWG)
Wire Temporarily
Disconnected
Ground Resistance
Meter
LP Downconductor
(Disconnected from
LP Ground)
Structure Bonding Cable
(Disconnected from L P Ground)
LP Grounding System
To Upper
Termination
2 . 5 mm
2
( 12 AWG)
Wire Temporarily
Disconnected
Ground Resistance
Meter
LP Downconductor
(Disconnected from
LP Ground)
Structure Bonding Cable
(Disconnected from L P Ground)
LP Grounding System
Figure 41 : Grounding and downconductor continuity testing
I
H
G
At the lower
termination of the
downconductor,
disconnect the
2 . 5 mm 2 ( 12 AWG)
bonding wire
from under the
hose clamp.
G
If possible, measure the continuity
between the center conductor at the lower
and upper end of the downconductor,
(this should be low ohms).
I
With a multimeter, measure the continuity
between the center conductor and the
copper screen of the downconductor.
(This should be greater than 1 , 000 ohms).
H
Figure 40 : Grounding and downconductor continuity testing
F
Reconnect the structure ground
bonding cable to the lightning
protection ground system, then
measure & record in column 3 of
ground resistance readings.
F