Network Meter Block Installation, Operation, & Maintenance Manual
Installation 12
3.2 Electrical Installation
3.2.1 Evaluation Standards Used
The following electrical standards were used in the evaluation of the NMB:
• General: IEC 60079-0 7
th
Edition, EN 60079-0:2018, UL 60079-0 7
th
Edition, CAN/CSA C22.2 No.
60079-0:2019
• Zone 1: IEC 60079-1 7
th
Edition, EN 60079-1:2014, UL 60079-1 7
th
Edition, CAN/CSA C22.2 No.
60079-1:2016
• Zone 2: IEC 60079-7 5
th
Edition, EN 60079-7:2015, UL 60079-7 5
th
Edition, CAN/CSA C22.2 No.
60079-7:2016
3.2.2 North American Installations
When installing in the United States, the NMB must be installed in accordance with the National Electrical
Code (NEC) NFPA 70 following the specific requirements for the zone or division area declared.
When installing in Canada, the NMB must be installed in accordance with the Canadian Electrical Code
CSA C22.1 following the specific requirements for the zone or division area declared.
3.2.3 ATEX and IECEx Zone 1 Installations
The following information is specific to NMB models purchased with an explosion-proof instrument housing
(with “XP” or “SS” in the model code) that will be installed in Zone 1 locations:
• Cable entries must be in accordance with IEC 60079-1 Section 13.
• For wiring systems using cable glands, the gland or thread adapter must be Ex d IIB IP66 certified. The
cable end must be securely installed and, depending on the cable type, must be properly protected
from mechanical damage.
Figure 5: Genesis Meter with NMB Enclosure
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