An island brings an extra counter and space for storing to a kitchen. If the countertop space is bigger than 12 by 24 inches, which is true for the standard island, the National Electrical Code requires the island to possess an electrical receptacle. the simplest method to urge the wiring to the receptacle is to run it under the ground, but which will not be possible if the ground is concrete otherwise you can't get underneath it. therein case, you'll run it through the attic and down an ornamental pillar.

Under the ground
1
Install the electrical box for the outlet at the specified location. It is often a maximum of 12 inches below the counter.

2
Drill a hole through the rock bottom of the island's cabinet and therefore the subfloor with a drill and a 1-inch bit. Pass a length of electrical conduit through the opening and fasten the conduit to the box with appropriate fittings. Terminate the conduit under the ground with an elbow that points within the direction of the facility source.

3
Feed a cable into the box and thru the conduit until the top emerges from the fitting under the ground. Pull it to the extent where you'll feed it up through the ground and connect it to power. If you're attracted directly from the panel and therefore the panel is on an equivalent floor, feed the cable to the panel.

4
Staple the cable to the undersides of the ground joists with wire staples.

Through the Attic
1
Incorporate one or more decorative pillars into the island design that reach from the ceiling to the highest of the counter. Construct one among the pillars with a lengthwise notch or hole large enough to contain and conceal a cable. Drill a hole through the countertop to permit you to tug the cable through.

2
Run the cable through the attic from the panel or from another point of connection to the pillar. Cut a hole within the ceiling drywall directly above the notch that's large enough for the cable.

3
Feed the cable down through the pillar and pull out enough from the opposite end to form connections. Staple the cable to the ceiling joist nearest the pillar and to the opposite joists along its path.

4
Drill a hole within the top plate of the wall that contains the facility source -- whether it is the panel or another receptacle. Feed the cable through the opening to the facility source and make connections.

The dishwasher should be on a separate circuit. There are also NEC requirements on how many open receptacles are required based on the island dimensions, sink location, etc., that the above comment does not address.