Connection Notes; Connection; Extension Cord Notes - Yamaha EF12000DE Owner's Manual

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9 Connect the Ground (earth) terminal to a
ground source. In order to prevent electrical
shock, the generator must be grounded when
using an electrical device with a ground plug.
1 Ground (earth) terminal
G-385

CONNECTION NOTES

9 Avoid connecting the generator to commercial
power outlet.
9 Avoid connecting the generator in parallel with
any other generator.
1 Correct
2 Incorrect
G-440

CONNECTION

WARNING
Before the generator can be connected to a build-
ing's electrical system, a licensed electrician must
install an isolation (transfer) switch in the build-
ing's main fuse box. The switch is the connection
point for generator power and allows selection of
generator or main line power to the building. This
will prevent the generator from charging the main
power line (backfeeding) when the main power
supply has failed or has been turned off for line
repair. Backfeeding can electrocute or injure line
743-013
maintenance personnel. Also, generator and build-
ing electrical system damage can occur when nor-
mal operating power returns if unit is used without
an isolation switch.
G-387

EXTENSION CORD NOTES

9 When using an extension cord, its total length
should not exceed

60 meters for cross section of 1.5 mm square

and

100 meters for cross section of 2.5 mm


square.
9 This extension cord should be protected by a
tough flexible rubber sheath (IEC 245) or the
equivalent to withstand mechanical stresses.
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