AccuLoad IV Installation & Maintenance Manual
Installation 19
3.3.3 Cable Entries
All cable entries must meet the requirements of ABNT NBR IEC 60079-1, summarized as follows:
• Any installation accessories used in the cable entries (such as cable glands, adapters, or bushings) must
be Ex d certified. The cable ends must be properly installed and adequately protected against
mechanical damage.
• For wiring systems using conduits, a certified sealing unit must be used immediately at the entrance of the
enclosure. Any unused input must be correctly closed with a certified device that guarantees the type
and degree of protection (IP65).
3.3.4 Cover Fasteners
The EX d enclosure requires cover mounting bolts to be M8 x 1.25-6g, DIN 912, steel grade 12.9.
3.3.5 Grounding
The touch-screen user interface (if provided) is protected by an intrinsic safety barrier, the Ex d enclosure
must be grounded in accordance with national electrical code regulations.
The ground connection must be made through the external ground terminal of the Ex d enclosure. An
external connection is not necessary when using metal conduits or shielded cables.
The cross section of the external ground wiring must be 10 to 12 AWG (5.26 mm
2
to 3.31 mm
2
wire).
3.4 ALIV SA Installations
The AccuLoad IV SA model is comprised of the following units:
• One FCM unit that contains all of the I/O control electronics connected to peripheral hardware, such as
meters, valves, and permissives
• One or two MMI units that act as the operator control panels
North American Division 2 and Zone 2 installation requirements must be followed for the installation of
the AccuLoad IV N4 and SA equipment; substitution of components may void safety certifications.
Compliance with local codes is mandatory.
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