Rice Lake EL232 XPCD Explosion Proof Remote Serial Display - Manual (Page 12)

8 EL232 XCPD Installation Manual
2.2 Sealoff Fittings
The utmost care must be taken to completely seal the inside of the remote display off from the outside world. To
do this all wiring into and out of the enclosure must be in conduit using sealoff fittings between the remote
display and the conduit. The sealoff fittings ensure that the hazardous atmosphere does not travel either through
the conduit or through insulation or wiring back to the safe area. The graphic shown below illustrates the location
of sealoff fittings.
These fittings, once installed and sealed are very difficult to remove so make sure all the wiring has been double
checked before beginning. If rigid conduit is not being used for connection to the scale base, be sure to install an
approved strain relief fitting to avoid pulling the wires out of the sealoff fittings in an accident. Doing so would
open a flame path to the enclosure and defeat its purpose.
Note: The inside of an explosion proof enclosure is considered a Division II area when the enclosure has
been properly sealed.
SEAL FITTING
18" MAX.
FROM BOX
MAKE SURE THE MOUNTING SUPPORT IS CAPABLE
OF HOLDING CONDUIT TIGHT AGAINST IT. NO
STRAIN MUST BE PLACED ON THE SEALOFF
FITTING ASSEMBLY.
WHEN USING FLEXIBLE CONDUIT, USE
MULTIPLE PIPE STRAPS TO SECURE
R I G I D C O N D U I T T O T H E S U P P O R T
STRUCTURE. ATTACH THE FLEXIBLE
CONDUIT TO THE RIGID CONDUIT ONLY
AFTER MULTIPLE STRAPS HAVE BEEN
ATTACHED TO PREVENT ANY STRAIN
FROM REACHING THE SEAL-OFF FITTINGS.
CLASS I
DIVISION 2
GROUP
C & D
CLASS II DIVISION 1
GROUP
E F & G
TO PREVENT IGNITION OF
HAZ.
ATMOS.,
DISCONNECT
ORE OPENING
. KEEP
CIRCUIT IS
ALIVE
FROM SUPPL
Y BEF
ASS'Y TIGHT WHILE
CA
UTION:
REMOTE WEIGHT DISPLAY
LBS KGS GROSS NET NO SIGNAL
MADE IN U.S.A.