66
Reference Manual
00809-0100-4530, Rev DD
May 2016
4.2
Cable/conduit entries
The electronics housing has two entries for ½ - 14 NPT. Optional M20×1.5, minifast
®
and
eurofast
®
adapters are also available. The connections are made in accordance with local or
plant electrical codes.
Make sure that unused ports are properly sealed to prevent moisture or other
contamination from entering the terminal block compartment of the electronics housing.
Note
Use the enclosed metal plug to seal the unused port. The orange plastic plugs mounted at
delivery are not sufficient as seal!
4.3
Grounding
The housing should always be grounded in accordance with national and local electrical
codes. Failure to do so may impair the protection provided by the equipment. The most
effective grounding method is direct connection to earth ground with minimal impedance.
There are two grounding screw connections provided. One is inside the field terminal side
of the housing and the other is located on the housing. The internal ground screw is
identified by a ground symbol:
.
Figure 4-1. Ground Screws
A. Internal ground screw
B. External ground screw
High voltage that may be present on leads could cause electrical shock.
Avoid contact with leads and terminals.
Make sure the main power to the Rosemount
™
5300 Transmitter is off and the
lines to any other external power source are disconnected or not powered while
wiring the gauge.
Probes covered with plastic and/or with plastic discs may generate an
ignition-capable level of electrostatic charge under certain extreme conditions.
Therefore, when the probe is used in a potentially explosive atmosphere,
appropriate measures must be taken to prevent electrostatic discharge.
A
B
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