TDW PIG-SIG V, Operating And Maintenance Instructions Manual

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14
Section II – Introduction
Type 9 enclosures are for use indoors in locations classified as Class II,
Groups E, F, or G, as defined in the National Electrical Code.
•
Group E – Atmospheres containing metal dust.
• Group F – Atmospheres containing carbon back, coal dust, or coke
dust.
• Group G – Atmospheres containing flour, starch, or grain dust.
Table 9. Conforming International Standard
Type of Protection NEMA IEC
Rain Tight
Type 3 IP-63
Water Tight
Type 4 IP-65
Submersible
– IP-67
Oil Tight/Dust Tight
Type 13 –