AccuLoad IV Installation & Maintenance Manual
Installation
18
•
For wiring systems using cable glands, the gland or thread adaptor must be Ex d certified. The cable
ends must be securely installed and, depending on the cable type, be properly protected from
mechanical damage. Requirements outlined in Section 10.4 of IEC 60079-14 should be followed.
•
For wiring systems using conduit, an Ex d certified sealing device must be immediately at the entrance of
the enclosure. Any unused entry must be suitably blocked with an Ex d IIB IP 65 certified plug for ATEX
and IECEx applications. For North American Zone applications, the plug must be listed close up type.
Requirements outlined in Section 10.5 of IEC 60079-14 shall be followed.
3.2.5 Cover Fasteners
Cover bolts are required to be M8 x 1.25-6g, DIN 912, steel grade 12.9.
3.2.6 Grounding
The touch-screen user interface (if provided) is protected by an intrinsic safety barrier; the enclosure must
be grounded in accordance with national electrical code regulations; for example National Electrical Code
(NEC) or Canadian Electrical Code (CEC).
Equipment bonding should be provided at the external grounding facility terminal; an external connection is
not required when using metallic conduit or armored cable.
The external grounding facility terminal wire range is 10 to 12 AWG (5.26 mm
2
to 3.31 mm
2
wire).
3.3 UL Brazil INMETRO-Approved Installations
The following information is specific to AccuLoad models ST and QT to be installed in Brazil, which
requires INMETRO standards to be followed.
3.3.1 Hazard Warnings
To prevent the ignition of explosive atmospheres and to avoid electric shock, disconnect the power circuits
before opening the Ex d enclosure. Keep the enclosure tightly closed when circuits are alive.
The AccuLoad contains internal battery-powered internal circuits; to prevent the ignition of an explosive
atmosphere, do not open the enclosure unless the area is known to be non-hazardous. Substitution of
components may impair intrinsic safety.
3.3.2 Special Conditions for Safe Use
Special conditions for safe use include:
•
Cables and cable glands should be suitable for operation at 81 °C.
•
For information about the dimensions of flame-proof joints, contact TechnipFMC at the address provided
on the back page this manual.
The maximum ambient temperature for the enclosure is 60 °C for INMETRO-approved applications.
Summary of Contents for Smith Meter AccuLoad IV
Page 7: ...AccuLoad IV Installation Maintenance Manual Introduction 2 Figure 1 AccuLoad IV ST ...
Page 9: ...AccuLoad IV Installation Maintenance Manual Introduction 4 Figure 3 AccuLoad IV QT ...
Page 11: ...AccuLoad IV Installation Maintenance Manual Introduction 6 Figure 5 AccuLoad IV N4 ...
Page 14: ...AccuLoad IV Installation Maintenance Manual Introduction 9 Figure 8 AccuLoad IV SA FCM ...
