Definition of panelboard
1 : a drawing board with an adjustable outside frame that is forced over paper so as to hold and strain it
2 : a strong rigid paperboard used for paneling in automobile bodies and in building construction
3 : an electrical panel containing switches and fuses or circuit breakers controlling branch circuits (as for lights or fan motors) that is enclosed in a metal cabinet and usually placed in or against a wall —called also distribution board
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