Ground fault circuit interrupters and arc fault circuit interrupters sound as though they’re very similar, but their functions and purposes are very different. The primary purpose of ground fault circuit interrupters is to protect people from electrical shock. Arc fault circuit interrupters are intended to limit the possibility of an electrical fire caused by an arc. The way each device functions is also very different. GFCI Devices Ground fault devices compare the current in the ungrounded (black) and grounded (white) conductors. If there is a difference over 5 milliamperes (5ma) ...
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