If you can’t get the information this way, visit the Library of Congress website at http://www. loc. gov/pictures/collection/hh/ to see if historical records pertaining to the building are available. Helpful historical documents could include building plans or contracts.
Keep in mind that this may not be the most reliable way to get information, and double check any information you get from your neighbors if you can.
Before deciding on a plan for electrical work, get price estimates from different electricians for the work they propose.
This marking should be visible every 12 inches (30 cm) on the plastic tubing. These cables may also be visible between open floor joists or at the electrical panel of the building.
