Audex AS Series Manual page 11

v. With single phase pumps common wire colours are as follows:
1. Live (hot / active) normally Brown / Black
2. Neutral normally Blue / White
vi. Control cores (usually numbered 5 and 6) are provided for a thermal switch. If this is
fitted, it will remain closed whilst the pump is under the maximum temperature limit, and
opens if the pump overheats. This should be connected into the control panel to cut the
pump off if these cores are not continuous.
vii. Control cores (usually numbered 7 and 8) are sometimes provided for a seal fail sensor.
This is currently fitted as standard on 22kW pumps and larger. These can safely be left
disconnected (no power present), but we recommend that these are connected to a
resistance monitoring device. One core (usually 7) is connected to ground in the pump
casing, and the other (usually 8) is connected to a probe below the motor. As soon as
moisture breaches the seal the resistance will fall between these two cores. The output of a
resistance monitoring relay can then be used to cut the pump off before damage occurs to
the motor.
viii. Ensure that all terminals are tightened sufficiently to ensure arcing is not possible due to
loose connections.
ix. All cable bends should not be sharp. The cables have a minimum bending radius which is
available from Audex or your local distributor if in doubt.
x. The voltage drop in long cables must be taken into account. The pump rated voltage is as
at the pump, not the supply end of the cable. With 20m or less cables, this voltage drop is
usually negligible but if in doubt or if longer cables are used this should be verified. Voltage
tolerance is available from Audex or your local distributor.
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Installation Electrical