Honda EB11000 Owner's Manual page 19

Observe the following precautions to ensure proper GFCI operation
and to reduce shock hazards:
Use grounded 3-conductor extension cords, tools, and appliances,
or double-insulated tools and appliances.
Inspect cords and plugs, and replace if damaged.
Do not use cord lengths greater than 164 feet (50 meters), and do
not use multiple tools and appliances with built-in noise filters. Such
use may activate the GFCI and trip the circuit breaker.
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