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Power Wiring
January 2009 UDA2182 Universal Dual Analyzer Product Manual 17
4.3 Power Wiring Considerations
Recommended wire size
Observe all applicable electrical codes when making power connections. Unless locally
applicable codes dictate otherwise, use 14-gauge (2.081 mm
2
) wire for ac power,
including protective earth.
Power supply voltage and frequency within specs
The power supply voltage and frequency must be within the limits stated in the
specifications in Section 2.
4.4 Installing Power Wiring
Procedure
WARNING
Turn power off at mains before installing AC Power Wiring.
Do not remove boards with power ON.
CAUTION
To avoid damage to the case when connecting to a rigid metallic conduit system, the
conduit hub must be connected to the conduit before the hub is connected to the
enclosure
Table 4-1 Procedure for installing AC Power Wiring
Step Action
1
Check the tag on the outside of the case to be sure that the voltage rating of the unit
matches the input voltage at your site.
ATTENTION
The Unit may be damaged if you apply power with the wrong voltage.
2 With Power off, open the case:
• Loosen the four captive screws on the front of the bezel.
• Grasp the bezel on the right side. Lift the bezel gently and swing the bezel open to the left.
3
Refer to Figure 7-1 for the location of the printed wiring board retainer. Loosen the two
WARNING
The ground terminal must be connected to a reliable earth
ground for proper operation and to comply with OSHA and
other safety codes. If metal conduit is used, connect a bonding
wire between conduits. Do not rely upon the conductive coating
of the instrument case to provide this connection. Failure to
observe this precaution may result in serious personal injury.