Badger Meter B3000 - Manual (Page 42)

Compact Digital Flow Monitor, Model B3000
Page 42 March 2014
EXPLOSION-PROOF ENCLOSURE
The ExDirect instrument enclosure is designed to house instrumentation and control equipment as well as act as a conduit
Installation
1 ExDirect instrument enclosures are furnished with three 3/4 in NPT offset through-feed cast hubs for conduit entries
2 Secure the enclosure to the conduit system If the enclosure has mounting feet, select a mounting location that will
provide sufficient strength and rigidity to support the enclosure as well as the enclosed device and wiring
WARNING
ELECTRICAL POWER MUST BE “OFF” BEFORE AND DURING INSTALLATION AND MAINTENANCE.
CAUTION
SELECT A MOUNTING LOCATION SO THAT THE ENCLOSURE WILL NOT BE SUBJECTED TO IMPACT BY HEAVY OBJECTS.
IMPACTS CAN DAMAGE ENCLOSED DEVICES OR GLASS LENS.
3 Install sealing fittings as required by Section 501-5 and/or 502-5 of the National Electrical Code® and Section 18 of the
Canadian Electrical Code or any other applicable IEC 60079-14 codes and when enclosure is installed in Class I Group B
hazardous locations (For CSA Group C applications, unsealed conduit lengths must not exceed 5 ft or 152 cm )
3.35 [85.1]
2.25 [57.1]
0.33 [8.4]
5.25 [133.4]
5.65 [143.5]
Figure 32: Ex-proof enclosure dimensions
4 Loosen set screw on instrument cover with a 2 mm Allen wrench
5 Un-thread instrument cover and carefully set aside to prevent damage to the cover threads and glass lens
6 Pull wires into enclosure making certain they are long enough to make the required connections and to remove the
instrument or power supply if servicing is required Install instrument and power supply, if applicable, and make all
electrical connections
7 Test wiring for correctness by checking continuity and also check for unwanted grounds with insulator resistance tester
Make sure test equipment being used will not damage instrument to be housed in the ExDirect instrument enclosure
8 Carefully re-thread cover to enclosure housing Tighten cover until cover flange contacts body face