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WDG SENSOR TYPE
WDG HPII (O2 only)
WDG HPIIC (combustibles)
Table 3-2.
Required sensor cable wiring
(minimum acceptable grades).
3-24 | Thermox Series 2000 WDG-HPII / HPIIC - ATEX
General Wiring and Conduit Requirements
This section describes general wiring and conduit requirements:
•
Sensor wiring conductors must be rated at a minimum of 80°C. All
other wiring conductor ratings should be for the minimum tempera-
ture required for the equipment being connected to the analyzer, but
not less than 60°C.
•
Use only the applicable NEMA approved conduit fittings or cable fit-
tings to maintain the NEMA rating for the Series 2000 controller or
sensor enclosure. If not using a conduit entry, leave the factory NEMA-
approved plugs intact. Never leave any holes unplugged.
•
Follow all applicable electrical codes for your location.
•
Follow proper grounding, shielding and noise protection practices as
described in this section.
•
Use twisted-pair cable with an overall braided shield, or twisted-pair
cable in rigid metal conduit for all sensor and signal wiring.
•
For AC mains supply wiring, use between 12 and 14 American Wire
Gauge (AWG) or equivalent metric between 3.3 mm
all signal wiring, use 18 to 22 AWG (0.82 mm
shows the required sensor cable types for various WDG-style sensors.
•
Use the conduit entry point closest to the connections you are making.
Do not add any additional conduit entry holes!
•
You may use 1" conduit with a 3/4" adapter at the entry to the Series
2000 controller for signal and sensor wiring.
6 (to 40 feet)
8 (to 1000 feet – must use
NUMBER OF TWISTED
PAIRS NEEDED
4
remote sense)
2
2
and 2.1 mm
2
2
to 0.33 mm
). Table 3-2
GAUGE OF WIRE
22 AWG (to 250 ft.)
18 AWG (250 to 1000 ft.)
18 AWG
. For
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