Yokogawa GD40 Gas Density Detector - Manual (Page 29)

<2. Installation, Wiring and Piping>
2-6
IM 11T3E1-01E
2.2.2 GD402T (FM Explosion-proof Approval)
Sealing Fitting
Conduit
475 mm (18") Max.
NON-HAZARDOUS
LOCATIONS
HAZARDOUS
LOCATIONS
GD402T
F0202.ai
Figure 2.4
1. GD402T Gas density converter for use in hazardous (classified) locations:
• Explosion-proof for Class I, Division 1, Groups B, C and D;
Dust Ignition-proof for Class II, III, Division 1, Groups E, F and G
• Enclosure Rating: NEMA 4X
• Temperature Code: T6
• Ambient Temperature: -10 to 55°C
2. Wiring
• All wiring shall comply with National Electrical Code ANSI/NFPA 70 and Local Electrical
Codes.
WARNING
Seal all conduits within 475 mm (18 inches). Refer to Figure 2.4.
3. Operation
• Note a warning label worded as follows.
WARNING
Open circuit before removing cover.
• Take care not to generate mechanical spark when access to the instrument and
peripheral devices in hazardous locations.
4. Maintenance and Repair
• The instrument modification or parts replacement by other than authorized representative
of Yokogawa Electric Corporation is prohibited and will void the approval of Factory Mutual
Research Corporation.