Lecture 3 Requirements for Electrical Installation 1

Shop Practice with Electrical Code: Requirements for Electrical Installation Part 1 Jayson Bryan E. Mutuc, REE, RME BSEE-PUP MSEE, Major in Power Systems -MIT (candidate)

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Article 1.10 – Requirements for Electrical Installation Article 1.10 sets the stage for how you’ll implement the rest of the PEC. This article contains a few of the most important and yet neglected parts of the Code. For example: • How should conductors be terminated? • What kinds of warnings, markings, and identification does a given installation require? • What’s the right working clearance for a given installation? • What do the temperature limitations at terminals mean? • What are the PEC requirements for dealing with flash protection?

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Article 1.10 – Requirements for Electrical Installation 1.10.1.1 Scope This article covers general requirements for the examination and approval, installation and use, access to and spaces about electrical conductors and equipment, enclosures intended for personnel entry and tunnel installations

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Article 1.10 – Requirements for Electrical Installation 1.10.1.2 Approval (p.35) The conductors and equipment required or permitted by this code shall be accepted if only approved.

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Article 1.10 – Requirements for Electrical Installation 1.10.1.3 Examination, Identification, Installation and Use of Equipment (p.3536) (1) Suitability for installation and use in accordance with the PEC (2) Mechanical strength and durability (3) Wire-bending and connection space (4) Electrical insulation (5) Heating effects under all conditions of use (6) Arcing effects (7) Classification by type, size, voltage, current capacity, and specific use (8) Other factors contributing to the practical safeguarding of persons using or in contact with the equipment

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Article 1.10 – Requirements for Electrical Installation 1.10.1.3(b) Installation and Use. Listed or Labeled equipment shall be installed and used in accordance with any instructions included in the listing and labeling

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Article 1.10 – Requirements for Electrical Installation Failure to follow product listing instructions, such as the torquing of terminals and the sizing of conductors, is a violation of this Code rule.

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 Electrical Connections (p.39) Conductor terminal and splicing devices must be identified for the conductor material and they must be properly installed and used 8

Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (A) Terminals (p.39) Conductor terminals must ensure a good connection without damaging the conductors and must be made by pressure connectors (including set screw type) or splices to flexible leads. 9

Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (A) Terminals

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (B) Splices

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (B) Splicing

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (B) Splicing

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (C) Temperature limitations. The temperature rating associated with the ampacity of a conductor shall be selected and coordinated so as not to exceed the lowest temperature rating of any connected termination, conductor, or device.

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (C) (1)(a) Equipment provisions (p.40) Termination provisions of equipment for circuits rated 100 amperes or less, or marked for 2.0 mm2 (1.6 mm dia) through 38 mm2 conductor, shall be used only for one of the following: 1) Conductors rated 60 degrees celcius

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (C) (1)(a) (3) Conductors with higher temperature ratings if the equipment is listed and identified for use with such conductors.

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Article 1.10 – Requirements for Electrical Installation 1.10.1.14 (C) (1)(b) Termination provisions of equipment for circuits rated over 100 amperes, or marked for condcutors larger than 38mm2 shall be used only for one of the following: 1. Conductors rated 75OC 2. Conductors with higher temperature ratings, provided the ampacity such conductors does not exceed 75OC ampacity of the conductor size used, or up to their ampacity if the equipment is listed and identified for use with such conductors

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Article 1.10 – Requirements for Electrical Installation 1.10.1.16 Flash Protection (p.41) Electrical equipments that are likely to require examination adjustment, servicing, or maintenance while energized shall be field mark to warn licensed electrical practitioner or non licensed electrical practitioner under supervison of a licensed electrical practitioner of potential electric arc flash hazards. 18

Article 1.10 – Requirements for Electrical Installation 1.10.1.22 Identification of Disconnecting Means (p.42) Each disconnecting means shall be legibly marked to indicate its purpose unless located and arranged so the purpose is evident. The marking shall be sufficient durability to withstand the environment involved. 19