Electrical Connection - Wilo Stratos Notice De Montage Et De Mise En Service

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7.2 Electrical connection

Warning! Electrical shock hazard
Dangers caused by electrical energy must be excluded.
• Electrical work by a qualified electrician only!
• National Electrical Codes, local codes and regulations must be strictly
followed.
• All electrical connections must be performed after the electrical supply has
been switched off and secured against unauthorized switching.
• For safe installation and operation a proper grounding of the pump to the
power supply's grounding terminals is required.
• Suitable mains fuse is required to protect the motor per local electrical codes.
• The operating voltage and frequency are marked on the rating plate.
• The pump must be connected with a power supply equipped with a grounded
plug-connection and a main power switch.
• A minimum cable size of 14 AWG should be used (refer to the local code for
wiring restrictions).
CAUTION! Possible damage of the pump
All conductors must be for at least 167°F (75°C).
• The electrical cable must be installed so that it never touches the pipework and/
or the pump and motor housing.
• The connecting cable can be fed through the cable entry below or beside the
terminal box, depending on it's orientation. It is advisable to install the screwed
cable glands with the entrance of the conduit pointing downwards. The cable
entry which is not used must be closed by a blind plug (fig. 5).
• Watertight screwed cable glands and conduit connections must be used to
prevent any entrance of water to the terminal box.
• Connect power as shown in fig. 5.
• Mains fuse: see rating plate
• Pump/installation must be grounded in compliance with regulations.
CAUTION! Possible damage of the pump
In insulation tests with a high-voltage generator the pump is to be
disconnected on all poles from the mains in the control module. The free
cable ends are to be insulated in accordance with the voltage of the high-
voltage generator.
26 Subject to technical alterations! WILO AG 05/2007