The well-known crack of a rifle, whose ball came skipping along the placid surface of the strait, and a shrill yell from the island, interrupted his speech, and announced that their passage was discovered.
An arc fault circuit interrupter (AFCI) is a circuit breaker that breaks the circuit when it detects an electric arc in the circuit it protects to prevent electrical fires. An AFCI selectively distinguishes between a harmless arc (incidental to normal operation of switches, plugs, and brushed motors), and a potentially dangerous arc (that can occur, for example, in a lamp cord which has a broken conductor).
GFCI Outlets. Protect against accidental electrocution. Ground-fault circuit interrupters (GFCI) is an electrical outlet with an extra line of defense against electrocution. A GFCI immediately removes electricity from the circuit when it detects a difference in the amount of energy passing through and returning back to the device.