Cable/Conduit Entries; Grounding - Emerson 5301HxxxxxxxxxxxxxxZZ Series Reference Manual

Electrical installation
April 2019
4.2

Cable/conduit entries

The electronics housing has two entries for ½ - 14 NPT. Optional M20×1.5, minifast
eurofast
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

Make sure grounding is done (including IS ground inside Terminal compartment)
according to Hazardous Locations Certifications, national and local electrical codes.
Note
Grounding the transmitter via threaded conduit connection may not provide sufficient
ground.
Note
In the explosion-proof/flameproof version, the electronics is grounded via the transmitter
housing. After installation and commissioning make sure that no ground currents exist
due to high ground potential differences in the installation.
Transmitter housing grounding
The most effective transmitter housing grounding method is a direct connection to earth
ground with minimal (< 1 Ω) impedance. There are two grounding screw connections
provided (see
Figure 4-1: Ground Screws
A. Internal ground screw
B. External ground screw
Signal cable shield grounding
Make sure the instrument cable shield is:
94
®
adapters are also available. The connections are made in accordance with local
Figure 4-1).
Reference Manual
00809-0100-4530
®
Rosemount 5300 Level Transmitter
and