A type of extension
cord that has two set of duplex
Edison (
NEMA 5-15) outlets (a total of 4 total outlets, hence the name "quad" box). Typically all outlets are on the same
circuit. Also known as a "1900 box," as 1900 is/was the model number by one manufacturer of a two-
gang box. Today, the pre-punched knock-outs make such a box unsuitable for anything other than an in-wall installation.
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