KROHNE BM 100A Handbook - Manual (Page 18)

18 Handbook BM 100 A
2.2 Electrical installation instructions
2.2.1 Wiring general notes
Read these instructions carefully!
Wiring must comply with any existing local regulations. Use appropriate wiring methods, conduits
and fittings to maintain a NEMA 6-6P / IP 67 rating.
1. Always disconnect the mains power supply before opening the housing,
2. unscrew the terminal compartment using the special wrench provided,
3. use the top cable entry port for the power supply (see “Principal gauge components”),
4. use a metal cable gland for input power leads to minimise RFI (radio frequency interference) /
EMI (electromagnetic interference) effects,
5. use a reinforced cable for the outputs,
6. do not cross or loop wires in the signal converter wiring box,
7. do not kink cables close to the glands. Cover with a metallic sheath at this point if necessary,
8. make U-bends in the cable to provide water with run-off points,
9. earthing the device shall be done according to the local applicable installation standards (EN
60079.14 in Europe),
10. and make sure that the cover thread in the housing is well greased and the O-ring is in good
condition before replacing the cover.
Shutting off the power supply : non-hazardous zones
Remember to disconnect the power supply before opening the housing.
Shutting off the power supply : hazardous zones
Wait before opening the housing cover. Refer to Supplementary Installation
and Operating Instructions for the BM100 A/Ai KEMA 01 ATEX 1078X
Gauge for the time required.