![]() Firstly, they provide slack that reduces any mechanical stresses on the power lines. The conduct Tails (or drip loops) serve two purposes. The service drop is attached to the mast at the mast knob. The term Mast refers to the conduit and weather head that extend upward from the roof. A mast service drop is illustrated in Figure 3. There are two types of overhead service drops, mast, and clevis. This concept is illustrated in Figure 2.įigure 2: Service Drop Voltages Mast and Clevis Service Drops This is why the service is identified as a 120/240V service. Between the two hotlines, there is a difference of potential 240V. Each hotline as a potential of 120V to the neutral line. The three conductors comprising the service drop consist of two hotlines and one neutral. The three lines may be independent conductors or housed in a three conductor cable called a triplex cable (As shown in the figure). The service drop illustrated in Figure 1 has two 120V lines and a neutral conductor. An overhead power connection from the utility lines to the service entrance is called the Service Drop. ![]()
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