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0000108497 00000 n 3. 600, the disconnecting means is permitted to be located elsewhere on the premises [225.32 Ex 4]. 0000105081 00000 n 7.0 CLEARANCES . National Fire Protection Association. What is the minimum clearance of overhead electric service drop wires Aerial lift operators must have a minimum clearance of 10 ft. from power lines, according to OSHA. /Info 168 0 R Can anything else be attached to a service mast for overhead electric service besides the service cables? All rights reserved. 0000103730 00000 n What is a reliable way to tell if the electrical service is 3 phase or single phase? Give timely information to the operator so that the required clearance distance can be maintained. 600, Top Changes to the 2023 National Electrical Code, Illustrated Catastrophes: Lousy Use of Lamp Cord, NEC: Air Conditioning and Refrigerating Equipment Part 5. PDF Nesc 234 Clearances to Other Structures - Ojua Otherwise, use Art. Should not run electric lines over other above-ground fuel storage tanks. Heat or ice load can affect the sag of the electrical line. The rule specifies that signs must be located so that: persons working on them are not likely to come into contact with overhead lines; no part of a sign or its support will interfere with normal work . Outdoor conductors present dangers from possible contact that indoor conductors dont. This line is an owner line not a utility line. These are: Systems designed for connection to multiple sources of supply for the purpose of enhanced reliability. There are four exceptions to this rule: 1) If documented safe switching procedures are established, maintained, and monitored by qualified persons, the disconnecting means can be located elsewhere on the premises [225.32 Ex 1]. Also, What is the electrical "service point" of a house? The secondary conductors must be as short as possible. Methodically walk through your design, looking at all of the clearances for conformance to Art. TIP 4 Before digging contact Sask 1st Call for underground line locating services - 1-866-828-4888 or TIP 5 Use extreme caution Then install the disconnect within sight of or in the same enclosure with the controller [600.6(A)(2)], and ensure the disconnect is capable of: Disconnecting the sign or outline lighting and the controller from all ungrounded supply conductors. Required Clearance for Electrical Lines Over Buildings - both vertical One of the exceptions is the most common type of residential overhead electric service type, so we will start with it. overhead lines between buildings and structures To obtain the correct overhead clearance for conductors, measure from the maximum water level to the overhead conductors [680.8]. If the disconnecting means consists of more than one switch or circuit breaker, the combined ratings must be no less than the calculated load as determined per Art. Cranes Overhead power lines and cranes can be a disaster waiting to happen for crane operators and crew members.