By Barry Stone
Dear Barry,
My wife and I purchased a 15 year old home and have two concerns regarding the electrical system. We've noticed that the wires run through the attic, with no means of protection. They just lay exposed on the framing. Is this ok, or should the wires be run in pipes? Also, the main service panel is located on the far side of the attached garage. Therefore, wires that go to the other end of the house have to run a long distance. Could these long runs cause a loss of power? -Scott
Dear Scott,
The wiring you noticed in your attic is probably the type commonly known as "romex." It typically consists of three or four wires contained in a plastic sheathing, usually white or black. Installation of romex wiring in the attic of a residence is acceptable in many areas of the U.S., as long as it is secured in ways that comply with applicable safety standards. Some municipalities require protective piping, known as conduit, but running wires through an attic without conduit complies with standards set forth in the National Electrical Code, as long as your local building department approves such use.
As to your second question, significant voltage reductions only occur when wiring extends for considerably long distances, such as between separate buildings. Wire runs extending from one end of your home to the other should not pose a problem in this regard. However, if you've noticed symptoms that concern you, such as dimming lights, have the system checked by a licensed electrician.
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