2.23
Capacitance and inductance or inductance to resistance (L/R) ratio must not exceed the following
values:
For O
2
not exceeding 21% (CENELEC certification)
Gas group Capacitance Inductance or L/R ratio
: F mH : H/ohm
IIC
IIB
IIA
0.35
1.05
2.8
2.5
7.5
20.0
64
192
512
See certification details in Supplementary manual 01100 008A for conditions of use, in particular
Certificate BAS No Ex 842393/2 (10 February 1988).
2.8.1.3 F.M. Certification Requirements - Division 1
This cable should conform to ANSI/ISA RP12.6-1987 " Installation of Intrinsically Safe Instrument
Systems in Class 1 Hazardous Locations". See certification details in Supplementary Manual
01100008A for conditions of use, in particular system wiring schematic 01100/898 FM.
See Figure 2.8(a) for installation details of this cable to the Control (or Interface unit). The cable
must enter the Control unit by the gland hole in the top of the unit and be retained by the metal
cable shield. The cable screens are terminated to the earth (ground) lug on the gland locknut as
close as possible to the cable gland. If individual wire pairs are also screened these should be
terminated to the earth (ground) bus bar.
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