Allen&Heath Scepter USER GUIDE - Manual (Page 7)

Audio Owner Manual Section 1
Mains electricity is dangerous and can kill. Mains voltage is present within the
power unit but not the Scepter unit. Check your mains wiring and earthing before
connecting up and switching on.
The purpose of the “earth” (ground) connection in a mains supply is for the
prevention of electric shock from the mains voltage present. It is usual for the
chassis of mains powered equipment to be connected to earth to prevent the metal
parts becoming “live” and causing electric shock. Some are “double insulated” and
do not require an earth connection.
The Scepter power supply must be connected to a suitable mains
earth through the designated earth wire in the mains cord.
The power supply mains earth is not connected to the Scepter earth. The unit
should be connected via a different path to mains earth. (see CHASSIS GROUND
LIFT section)
Equipment will continue to function if it is not connected to mains earth.
This does not mean that it is safe. GOVERNMENT AND INSURANCE
UNDERWRITERS ELECTRICAL CODES MUST BE OBSERVED. These codes
take precedence over any suggestions in this manual.
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