HANDBOOK REQUIREMENTS - Central Maine Power Company

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Provision must be made so that the cabinet can be securely sealed with a padlock type seal when the cover is closed. Only Company owned devices may be installed in any cabinets housing meter connection devices or instrument transformers. All instrument transformer cabinets must be mounted on substantial wood backboards or contain suitable mounting provisions (inside) such that the instrument transformers can be readily installed and removed. Transformers shall be mounted so that a clearance of at least 2 inches is provided between all transformers, cables and the sides and top of the cabinet. All line conductors, including the neutral, shall pass through the instrument transformer cabinet. In addition, all line conductors in the cabinet must be clearly identified (by the customer/electrician), as to, "phase" and "line" or "load." A neutral connector shall be installed by the customer to provide for connection of the metering neutral. The customer shall mount all instrument transformers and make all primary connections. Secondary (metering) wires are furnished and installed by the Company. A separate 1 1/4 inch minimum metallic conduit for metering wires between instrument transformer cabinets and meter mounting devices shall be furnished and installed by the customer. This conduit shall be either rigid metal conduit (RMC) or intermediate metal conduit (IMC) and be properly bonded to provide an effective ground-fault current path (per Section VII and NEC Article 250). Advance approval must be obtained from the Company for special construction before installing conduit runs in excess of 35 feet. Where danger of plow or traffic damage exists, barriers consisting of concrete filled 6 inch IPS steel posts set a minimum of 48 inches deep must be installed for protection of the meter/meter mounting equipment. The posts shall be located so as 63 63
64 64 not to interfere with the opening of doors/covers or restrict access to enclosures. For locations where the service voltage exceeds 480 volts, advance Company approval of the instrument transformer installation is required. See paragraph 814 for Switchgear Installations. 812. MAST OR BUILDING MOUNTED CT INSTALLATION Mounting of CTs / VTs on the customer's service mast or on the building adjacent to the weatherhead is not permitted. Note: Except for the case of primary metering, CTs shall not be mounted on poles or pole mounted brackets. 813. PADMOUNT TRANSFORMER INSTALLATIONS Provided there will be only one customer served from the padmount transformer, the CTs may be mounted inside the padmount transformer enclosure. VTs shall not be installed in the padmount transformer enclosure. The VTs may, with prior Company approval, be installed in a separate weatherproof cabinet adjacent to the meter enclosure. 814. SWITCHGEAR INSTALLATIONS When instrument transformers are to be installed in switchgear, advance Company approval of transformer compartment plans is required. Following are the requirements for switchgear instrument transformer compartments: • “Hot sequence” metering is the standard arrangement.
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HANDBOOK OF REQUIREMENTS FOR ELECTR
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To contact us for information or as
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CENTRAL MAINE POWER TOWNS SERVED TO
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TABLE OF CONTENTS I. INTRODUCTION 1
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501. Conductor Identification 502.
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XI. UTILIZATION EQUIPMENT SPECIFICA
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25. [364-9 & 364-10] Large 9’ x 9
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2 102. REVISIONS OF REQUIREMENTS Th
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4 II. General Requirements 200. APP
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6 Dwelling Application is used when
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8 be any duty or obligation on the
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10 214. CUSTOMER'S RESPONSIBILITY 1
Page 27 and 28: 12 be provided with suitable automa
Page 29 and 30: 14 219. CUSTOMER CONSTRUCTED/OWNED
Page 31 and 32: 16 16 • Provide the Company a pla
Page 33 and 34: 18 III. STANDARD CHARACTERISTICS 30
Page 35 and 36: 20 20 service (whenever possible) f
Page 37 and 38: 22 22 304. TRANSFORMER VAULTS AND M
Page 39 and 40: 24 recommended to provide adequate
Page 41 and 42: 26 Refer to paragraph 219 for the r
Page 43 and 44: 28 Company requirements. Following
Page 45 and 46: 30 conductor to the neutral. Meteri
Page 47 and 48: 32 ith outlets used as mobile home
Page 49 and 50: 34 34 protection shall be installed
Page 51 and 52: 36 36 conductors must extend at lea
Page 53 and 54: 38 505. SERVICE MAST CONSTRUCTION U
Page 55 and 56: 40 40 of sufficient size to readily
Page 57 and 58: 42 42 double-throw switch or other
Page 59 and 60: 44 VII. GROUNDING AND BONDING 700.
Page 61 and 62: 46 2. Metal frame of building or st
Page 63 and 64: 48 electrode/conductor or metallic
Page 65 and 66: 50 building or structure grounding
Page 67 and 68: 52 test switches and control cable
Page 69 and 70: 54 54 804. POLE MOUNTED METERS Pole
Page 71 and 72: 56 56 identify the area served by e
Page 73 and 74: 58 58 “connected to the grounded
Page 75 and 76: 60 by-pass requirements and the res
Page 77: 62 Meter mounting devices shall be
Page 81 and 82: 66 66 The mounting of Company meter
Page 83 and 84: 68 68 901. CUSTOMER RESPONSIBILITY
Page 85 and 86: 70 acceptable to mount the riser(s)
Page 87 and 88: 72 72 The Company will make all con
Page 89 and 90: 74 other distribution system exists
Page 91 and 92: 76 76 In cases not meeting the prec
Page 93 and 94: 78 78 Primary service requiring hig
Page 95 and 96: 80 80 Section 321 B. During back-fi
Page 97 and 98: 82 82 Customers electing to install
Page 99 and 100: 84 84 determined (in consultation w
Page 101 and 102: 86 service only if it is built to C
Page 103 and 104: 88 X. SERVICE FROM UNDERGROUND MAIN
Page 105 and 106: 90 XI. UTILIZATION EQUIPMENT SPECIF
Page 107 and 108: 92 B. Overload protective devices s
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HANDBOOK REQUIREMENTS - Central Maine Power Company

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