Specifications

METTLER TOLEDO Weigh Module Systems Handbook
(12/99)14-26
NEMA Type Description Requirements/Design Tests*
7 Indoor use in locations classified as Class I, Groups A, B, C, and D,
as defined in the National Electrical Code.
ANSI/UL 698, ANSI/UL 877, ANSI/UL 886,
ANSI/UL 894
8 Indoor or outdoor use in locations classified as Class I, Groups A,
B, C, and D, as defined in the National Electrical Code.
ANSI/UL 698, ANSI/UL 877, Rain
9 Indoor use in locations classified as Class II, Groups E, F, and G,
as defined in the National Electrical Code.
ANSI/UL 698, ANSI/UL 877, ANSI/UL 886,
ANSI/UL 894
10 Constructed to meet the applicable requirements of the Mine Safety
and Health Administration.
In accordance with the Mine Safety and
Health Administration
*ANSI/UL 698, Industrial Control Equipment for Use in Hazardous Locations.
ANSI/UL 877, Circuit Breakers and Circuit-Breaker Enclosures for Use in Hazardous Locations, Class I, Groups A, B, C, and D, and
Class II, Groups E, F, and G.
ANSI/UL 886, Outlet Boxes and Fittings for Use in Hazardous Locations, Class I, Groups A, B, C, and D, and Class II, Groups E, F,
and G.
ANSI/UL 894, Switches for Use in Hazardous Locations, Class I, Groups A, B, C, and D, and Class II, Groups E, F, and G.
Table 14-18: Hazardous Area Enclosures
The International Electrotechnical Commission (IEC) provides international
classifications (IP Codes) of enclosures for electrical equipment. Table 14-19 can be
used to convert NEMA Enclosure Type Numbers to IEC Enclosure Classification
Designations. However, since NEMA Types meet or exceed the test requirements for the
IEC Classifications, this table cannot be used to convert IEC Classifications to NEMA
Types.
NEMA Enclosure Type
Number
IEC Enclosure
Classification
Designation
1 IP10
2 IP11
3 IP54
3R IP14
3S IP54
4 and 4X IP56
5 IP52
6 and 6P IP67
12 and 12K IP52
13 IP54
Table 14-19: Conversion of NEMA Type Numbers to IEC Classification Designations