Summit PHC115G - Manuel (Page 6)

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 The marked electrical rating of the detachable power-
supply cord or extension cord should be at least as great
as the electrical rating of the appliance;
 If the appliance is of grounded type, the extension cord
should be a grounding type 3-wire cord; and
 The cord should be arranged so that it will not drape over
the countertop or tabletop where it can be tripped over,
snagged, or pulled on unintentionally, especially by
children.