Safety Yamatake Corporation
6 ST3000 Smart Transmitter Series 900 Electronic Differential Pressure/Pressure Transmitter
2. Class I, Division 2 locations
2.1 (a) Threaded metal conduit, or (b) cables approved for hazardous locations
with associated cable glands approved for the particular location, or (c)
Type TC cable installed in cable tray, or (d) Type ACWU cable with associ-
ated cable glands approved for the particular location, can be used.
2.2 Seals must be provided in conduit or cable systems to prevent passage of
gases, vapours or flames.
2.2.1 The seal is located in each run of conduit entering the apparatus enclosure as
close as practicable to and in no case more than 450 mm from the enclosure;
2.2.2 The sealing in Class I, Division 2 locations conforms to 1.3.2.
3. Class II, Division 1 locations
3.1 (a) Threaded rigid metal conduit, or (b) cables approved for hazardous loca-
tions with associated cable glands approved for the particular hazardous
location, can be used.
3.2 Where a raceway provides communication between the apparatus enclosure and
an enclosure that is not required to be dust-tight, the entrance of dust into the
former enclosure through this raceway must be prevented by (a) a permanent and
effective seal, or (b) a horizontal section not less than 3 m long in the raceway, or
(c) a vertical section of raceway not less than 1.5 m long and extending down-
ward from the dust-tight enclosure.
4. Class II, Division 2 locations
4.1 (a) Threaded metal conduit, or (b) cables approved for hazardous locations
with associated cable glands approved for the particular location, or (c)
Type TC cable installed in cable tray, or (d) Type ACWU cable with associ-
ated cable glands approved for the particular location, can be used.
4.2 Sealing of raceways conforms to 3.2.
5. Class III, Division 1 locations
5.1 Wiring methods
(a) Threaded rigid metal conduit or (b) cables approved for hazardous loca-
tions with associated cable glands approved for the particular hazardous
locations, can be used.
5.2 Sealing
Sealing means are not required.
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