Bonding And Grounding; Equipotential Bonding (Eb); 13Bwarnings - Mettler Toledo IND560x Guide D'installation

3.6.

Bonding and Grounding

All grounding and equal potential bonding connections must be made according to local
regulations based upon the country of installation. Refer to local codes and the control drawings in
the Appendix section of this manual for more specific information regarding grounding.
It is typical that local regulations will require that all connected pieces of equipment in the system
be bonded together and grounded to a single point. A special external ground screw designed for
equal potential bonding is provided on the IND560x terminal (Figure 3-46).
3.7.

Equipotential Bonding (EB)

Equipotential bonding must be installed by an electrician authorized by the owner. METTLER
TOLEDO Service performs only a monitoring and consulting function for this procedure.
Connect equipotential bonding of all devices (power supply unit, weighing terminal, interface
converter and weighing platform) in accordance with the terminal diagram and all country-specific
regulations and standards. In the process, it must ensured that:
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•
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3.7.1.

13BWarnings

3.7.1.1. 20BCENELEC
3.7.1.1.1. Connection of EB per Country-Specific Regulations
It must be ensured that the housings of all devices are connected to the same potential via the EB
terminals. No circulating current may flow via the shielding of the intrinsically safe cables.
3.7.1.2. 21BcFMus
3.7.1.2.1. Connection of EB per ANSI/NFPA 70, Article 504, and ANSI/IA RP 12.06.01 or Canadian Electric Code C22.2
It must be ensured that the housings of all devices are connected to the same potential via the EB
terminals. No circulating current may flow via the shielding of the intrinsically safe cables.
3-38 METTLER TOLEDO IND560x Terminal Installation Manual
Figure 3-46: IND560x Terminal Grounding Screw: Harsh (left), Panel (right)
All device housings are connected to the same potential via the EB terminals.
No circulating current flows via the cable shielding for intrinsically safe circuits.
The neutral point for equipotential bonding is as close to the weighing system as possible.
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