Electrical Installation - Hach POLYMETRON 8544 Manuel D'utilisation

Electrical installation

Electrocution hazard. Always remove power to the instrument before making electrical connections.
Wiring for power
Electrocution hazard. Protective Earth Ground (PE) connection is required.
Electrical shock and fire hazards. Make sure to identify the local disconnect clearly for the conduit
installation.
Potential Electrocution Hazard. If this equipment is used outdoors or in potentially wet locations, a
Ground Fault Interrupt device must be used for connecting the equipment to its mains power source.
Electrical shock and fire hazards. Make sure that the user-supplied power cord and non‐locking plug
meet the applicable country code requirements.
Install the device in a location and position that gives easy access to the disconnect device and its operation.
Supply power to the instrument with conduit or a power cable. Make sure that a circuit breaker with
sufficient current capacity is installed in the power line. The circuit breaker size is based on the wire
gauge used for installation.
For installation with conduit:
• Install a local disconnect for the instrument within 3 m (10 ft) of the instrument. Put a label on the
disconnect that identifies it as the main disconnect device for the instrument.
• Make sure that the power and safety ground service drops for the instrument are 18–12 AWG and
the wire insulation is rated for 300 VAC or higher.
• Connect equipment in accordance with local, state or national electrical codes.
• Connect the conduit through a conduit hub that holds the conduit securely and seals the enclosure
when tightened.
• If metal conduit is used, make sure that the conduit hub is tightened so that the conduit hub
connects the metal conduit to safely ground.
For installation with a power cable, make sure that the power cable is:
• Less than 3 m (10 ft) in length
• Rated sufficient for the supply voltage and current. Refer to the requirements in
on page 3.
• Rated for at least 60 °C (140 °F) and applicable to the installation environment
• Not less than 18 AWG with applicable insulation colors for local code requirements
• A power cable with a three-prong plug (with ground connection) that is applicable to the supply
connection
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Specifications
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