Archive for electrical rough in

Custom Home Construction (Electrical and Plumbing Rough In)

It’s a busy week at the site of the new home construction in Carrolltown, PA and this week some electrical and plumbing work began.

Electrical Rough In

Electrical Rough In

The electricians are on-site and started the work on the electrical rough in.  Following the house plans, electrical wires are pulled and outlet and switch boxes are installed.

At this point, the house is still connected to temporary power.  The new meter box was attached to the house and a main disconnect was installed and inspected.  The new service wires will be run underground, through conduit, to the location of the new pole.  Penelec will be installing the new pole, transformer and underground feed wires this week.  The permanent new electric service can then be turned on to the house.

With our new home construction in Carrolltown, PA, the conduit was run under the driveway.  In this case, we used SCH80 conduit as it is a thicker and stronger pipe than SCH40.  From the pole, we are using 3” conduit for the electric into the house and 2” conduit for the phone and communication lines.

The wiring used throughout the house is a 12 gauge standard Romex wiring.  However, 14 gauge wire was used to connect the hard wired inter-connected smoke alarm system.

The electrical rough in needs to be completed and pass inspection prior to adding insulation or installing dry wall.

The plumbing rough in was also completed.  The plumber installed supply pipes that will deliver clean water into the house and to the plumbing fixtures like sinks, toilets, etc.  He also installed waste pipes that will drain the water and waste from the fixtures.  These pipes will later be

Plumbing Rough In

Plumbing Rough In

connected to the fixtures that you will see and use throughout the house.

Supply pipes can be iron, copper or numerous varieties of plastic.  Wilkins Contracting used PEX, or crosslinked polyethylene, pipe for this new home construction.  This pipe has several advantages over metal pipe or plastic pipe, like PVC.  PEX pipe is flexible and resistant to scale and chlorine so it won’t corrode or develop pinholes over time.  It also has a higher burst strength than copper pipe.

DWV, or Drain Waste Vent, pipe was also run.  This is a SCH40 pipe and is the system that removes sewage and greywater from the house.  It also regulates air pressure in the waste system pipes, which facilities flow.  Waste that is produced at fixtures, like toilets, sinks and showers, exit the fixture through a trap, which is a dipped section of pipe that always contains water.  The traps are necessary to prevent sewer gases from leaking into the house.  The traps are connected to waste lines which will take the waste gases to a soil stack, or soil vent pipe.  This vent pipe is attached and rises (usually inside a wall) to and out of the roof.  Waste is removed from the house through drains that take them to the sewage line or septic system.

As with the electrical rough in, the plumbing rough in needs to be completed and inspected prior to adding insulation or installing drywall.  The plumber will cap the system and pump compressed air into the pipes to assure there are no leaks.  If the air holds for 24 hours, there are no leaks and the inspection is complete.

A lot more work is happening this week.  The guys have started siding the house.  So, stay tuned for the next post and more photos!