What is a demarcation point?
A. This is the point where your internal wiring meets the lines coming from the road. In a residential home it is usually a grounded protection block or lightning arrestor near where your line comes into the building. In a commercial building it is almost always in the main electrical room or a separate communications closet. Service providers use demarcation points to determine where their responsibility for service ends and the customers responsibility starts. Note: The Demarcation is not always inside, some are located under decks, in crawl spaces, behind shrubs or even in finished drywall ceilings.
