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I'd like to install this (Manufc. Page) 20A GFCI pop-up electrical box in the kitchen floor to allow cookware (microwave, blender, air fryer) to be plugged in. I will build a kitchen island cart to house the microwave and store the other cookware.

I need to make a plunge cut for a hole through a 12"x12" 5/16"-thick ceramic tile and through the subfloor underneath to house the outlet and run a 20A line to the breaker box.

I have a wired Fein Multimaster oscillating tool but there isn't any literature on what blade to use to cut ceramic tile. I have an angle grinder, which I know could do the job, but the circular blade means I can't make a complete cut at a corner.

Minh Tran
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1 Answers1

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Drill the corners, Score & Break the sides

With a handheld "tile scoring tool" you can also score a rectangle after drilling the corners, and tap with a hammer to break up the tile within the rectangle.

Select a bit that is small enough so that the face plate covers the curve. Carefully tap away anything that remains, using a hammer and a mason chisel or maybe an old wood chisel.

Angle Grinder, Drill the corners

Or you can use the angle grinder for round or rectangular holes, as you stated. Since you don't have access to both faces of the tile, you will have over/under cut. As with the score & tap approach, the trick is to drill the corners.

Hole Saw for wire only

For a round hole you can use a "Tile Hole Saw" for this:

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This would allow passage of the wire. The outlet could then be on a raised box, with a cover or faced sideways, to prevent liquids from flowing in. This is especially important if it is located in the "wet area" of the kitchen: near sinks, stove, and dishwasher, within reasonable flooding area. If it is not in a tripping area you could raise it even just by 0.5 inch.

P2000
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