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Page 47
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INSTALLATION
A533-23-880 Issue C
3.15.2
Connect the electrical supply to the iF system
Notes:
On an iF1800 system, the earth (ground) installation must ensure that there is an equipotential zone around
the iF system: the voltage between the protective earth (ground) stud on the iF system and any other
conducting surface within 2 metres of the iF system must be < 30 V r.m.s.
If you connect the electrical supply to an iF1800 system through ELCB relays, they must be suitable for the
protection of equipment with a d.c. component in the fault current, and suitable for short-duration
switch-on surges, and for high leakage current (for example, type B, according to prEN50178). The
iF1800 system is for use only with equipment that has no accessible terminals.
Use the following procedure to connect the electrical supply to the iF system. When you make your electrical supply
cable, ensure that the earth (ground) conductor is longer than the phase conductors. This will ensure that if the cable
is accidentally dragged and the strain relief bush on the electrical supply connector mating-half fails, the earth
(ground) conductor will be the last conductor to be pulled from the connector.
1. Refer to Figure 19. Remove the connector block (8) from the cover (7) of the mating-half supplied for the
electrical supply connector, then pass a suitable cable (6) through the strain relief bush (5) on the cover (7).
Refer to Section 2 for suitable cable sizes.
2. Connect the cable phase wires to the pins in the connector block (8) as shown in Table 14.
3. Connect the earth (ground) wire of the cable to one of the two earth (ground) screws (4) on the side of the
connector block (8).
4. Refit the cover (7) to the connector block (8), then tighten the strain relief bush (5).
5. Fit the mating-half to the electrical supply connector (9) on the Electrics Box (10).
6. Connect the other end of the electrical supply cable to your electrical supply through a suitable isolator.
7. On iF1800 systems, you must fit a second protective earth (ground) conductor to the protective earth (ground)
stud on the Electrics Box (Figure 4, item 11) and connect the other end of this conductor to your factory earth
(ground).
3.15.3
Connect an additional RF earth (optional)
An earth (ground) cable is connected to the rear of the M6 RF earth (ground) stud on the rear panel of the iF system
(Figure 4 item 6). If you will operate the iF system in an area subject to high RF (radio frequency) emissions, in
accordance with good RF installation practise, we recommend that you:
Use a star washer to connect the end of the earth (ground) cable connected to the iF inlet to one of the bolts
that you use to secure the inlet-flange (refer to Section 3.8).
Connect an additional earth (ground) cable to the M6 RF earth (ground) stud. You must use a suitable low-
impedance cable (for example, use braided cable).
WARNING
Connect the iF system to the electrical supply through a suitably rated isolator/connector for your
iF system (refer to Section 2 and the notes below).
WARNING
Ensure that the iF system and your electrical supply cable are suitably protected against earth
(ground) faults and that the earth (ground) conductor of the electrical supply cable is longer than
the phase conductors in the connector. On an iF1800 system, you must fit a second protective
earth (ground) conductor (with a cross-section of at least 10mm
2
) to the protective earth (ground)
stud on the Electrics Box.
