Ametek Thermox CEM O2/TM, User Manual

Page: 37 / 168

Installation
|
3-15
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
fittings 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
2
and 2.1 mm
2
. For
all signal wiring, use 18 to 22 AWG (0.82 mm
2
to 0.33 mm
2
).
•
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.
Figure 3-15.
Recommended sensor
cable wiring (minimum
acceptable grades).
SENSOR TYPE NUMbER OF TWISTED
PAIRS NEEDED
GAUGE WIRE
CEM O2/TIM 4 22 (TO 250 ft)
18 (250 TO 1000 ft)