2.3.4 Electrical conduit installation precautions
• Conduit cutoffs must be cut at a 90-degree angle. Cutoffs must be made by a cold
cutting tool, hacksaw, or by some other approved means that does not deform the
conduit ends or leave sharp edges.
• All conduit fitting-threads, including factory-cut threads, must be coated with a metal-
bearing conducting grease prior to assembly.
• Temporarily cap the ends of all conduit runs immediately after installation to prevent
accumulation of water, dirt, or other contaminants. If necessary, swab out conduits
prior to installing the conductors.
• Install drain fittings at the lowest point in the conduit run; install seals at the point of
entry to the gas chromatograph (GC) to prevent vapor passage and accumulation of
moisture.
• Use liquid-tight conduit fittings for conduits exposed to moisture.
When a conduit is installed in hazardous areas, follow these general precautions for
conduit installation:
• All conduit runs must have a fitting, which contains explosion-proof sealing (potting)
located within 3 in. (76.2 mm) from the conduit entrance to the explosion-proof
housing. The seal should have a minimum IP rating of IP54 or equivalent NEMA
®
/Type
rating on the conduit sealing devices.
• The conduit installation must be vapor tight, with threaded hub fittings, sealed conduit
joints and gaskets on covers, or other approved vapor-tight conduit fittings.
WARNING
Failure to observe precautionary signs may result in serious injury or death to personnel.
Observe all precautionary signs posted on the certified explosion-proof equipment.
Consult your company's polices and procedures and other applicable documents to
determine wiring and installation practices that are appropriate for hazardous areas.
Installation and start-up Quick Start Guide
July 2020 00825-0100-3770
20 Emerson.com/Rosemount
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