Domestic Electrical Installation Certificate Explained And UnexplainedDomestic Electrical Installation Certificate Explained In DetailAmendment Number 3 to BS7. Wiring Matters. Geoff Cronshaw provides us with a look ahead at the proposals of Amendment 3 to BS 7. Requirements for Electrical Installations – and the resulting changes on the design, erection and verification of electrical installations. Introduction. The National Wiring Regulations Committee, JPEL 6. BS 7. 67. 1: 2. 00. November 2. 01. 4. The Draft for Public Comment (DPC), which sets out the proposed changes, was made available for comment 1. December 2. 01. 3 and 7 March 2. I outline the draft proposals below. It’s important to note although I refer to the changes in the affirmative, they remain proposals (despite the comment period being closed) and not all of the proposals may be included in the final version of Amendment Number 3 - inclusion of proposals is at the discretion of JPEL 6.
Part 2 Definitions. Definitions will be expanded and modified. For example, the definition for . It was also decided that the definition for a . The Committee also proposed to modify the definition of . For example, Regulation 1. Electrical equipment shall be installed in accordance with the instructions provided by the manufacturer of the equipment. Download the 2016 Electrical Installation Guide: The practical guide for the design of electrical installations according to IEC standards. The Part P assessments are designed for installers that carry out electrical installation work in dwellings under the supervision of a Qualified Supervisor. The installation of electrical equipment shall take account of manufacturers’ instructions. This will apply to a cable, irrespective of the depth of that cable, in a partition where the construction of the partition includes metallic parts other than fixings. The exception for cables that form part of a SELV or PELV circuit will be retained. Section 5. 57 Auxiliary Circuits. A new section, Section 5. Auxiliary circuits are defined as circuits for the transmission of signals intended for the detection, supervision or control of the functional status of a main circuit, such as circuits for control, signalling and measurement. Auxiliary circuits for fire and intruder alarms, traffic lights, etc (where specific standards exist) are excluded. This is a completely new section. The current requirements for auxiliary circuits in BS 7. Regulation 5. 37. These units may be self- propelled, towed or transportable containers or cabins, for example, technical and facilities vehicles for the entertainment industry, medical services, advertising, firefighting, workshops, offices, and transportable catering units. There are many risks associated with such units, arising from: a loss of connection to earth because of temporary cable connections; the connection to different national and local electricity distribution networks; the impracticality of establishing an equipotential zone external to the unit; open- circuit faults of the PEN conductor of PME supplies, raising the potential of all metalwork (including that of the unit) to dangerous levels; shock from high functional currents flowing in protective conductors; andvibration while the vehicle or trailer is in motion, or while a transportable unit is being moved – causing faults within the unit installation. Some of the current Requirements that aim to reduce these risks included: Regulation 7. RCD. Regulation 7. Regulation 7. 17. Changes introduced by Amendment 3. Regulation 7. 17. CENELEC HD. The Regulation will require an insulation monitoring device to be installed so that automatic disconnection of the supply is provided in the case of a first fault or an RCD, and an earth electrode to be installed so that automatic disconnection is provided in the case of failure of the transformer to provide electrical separation. Regulation 7. 17. It also prohibits the interconnection of different earthing systems unless special precautions have been taken, as set out by Regulation 5. This reinforces the general rules in Parts 1 to 6 of BS 7. Regulation 7. 17. This also reinforces the general rules in Parts 1 to 6 of BS 7. Changes will be made to the figures that show examples of connections associated with the mobile or transportable units. Sections 5. 59, 7. In 2. 00. 8 additional requirements for general lighting were included for: protection against fire; connection of luminaires to the fixed wiring; fixing of the luminaires; through- wiring in a luminaire; control gear, for example, ballasts; compensation capacitors; andthe need to give consideration to stroboscopic effects. Amendment 3 will introduce a number of notable changes to align the BS 7. IEC and CENELEC standards. Examples of these intended changes include: moving the requirements for outdoor lighting and extra- low voltage lighting installations from Section 5. Section 7. 14 and Section 7. UV radiation effects within luminaires; andintroduction of the requirements for protection against electric shock for display stand for luminaires. Section 7. 15 Extra- low Voltage Lighting. The particular requirements apply to installations that are supplied from sources with a maximum rated voltage of 5. V a. c. BS 7. 67. SELV); protection against the risk of fire due to short circuit; types of wiring systems, including special requirements where bare conductors are used; the types of transformers and converters; andsuspended systems. Amendment 3 will make a number of notable changes to align the latest IEC requirements with CENELEC requirements, including: the types of wiring systems permitted; voltage drop in consumer’s installations; andrequirements for isolation, switching and control. Section 7. 14 Outdoor Lighting Installations. In 2. 00. 8 some major changes to the requirements for outdoor lighting installations were introduced, covering requirements for: car parks; gardens; parks; places open to the public; illumination of monuments; andfloodlighting. These will be retained in Amendment 3, along with the recommendations for additional protection by a 3. A RCD for telephone kiosks, bus shelters, advertising panels and town plans. Amendment 3 will make only minor changes to outdoor lighting installations. One important change will be that individual circuits will be required to be isolated. Chapter 4. 1 Protection Against Electric Shock. References to . The notes to the Tables will be changed to reflect maximum permitted operating temperature. In addition, Regulations 4. Cmin factor. Chapter 4. Protection Against Thermal Effects. Regulation 4. 21. This new Regulation is being introduced to help to protect against fire that can result from the overheating of connections within consumer units. Overheating can arise from loose connections and connections that have not been made correctly, for example, the connection of a cable over the insulation. Appendix 6 Model Forms for Certification and Reporting Appendix 6 contains the electrical installation certificate, the minor works certificate and the electrical installation condition report (used for reporting on the condition of an existing electrical installation) as required by Part 6 of BS 7. Condition report. The condition report has a series of inspection schedules. The inspection schedules provide a detailed breakdown of the inspection that is required on each aspect of an installation so that the work is carried out in an organised and efficient manner. For example, the schedule for domestic and similar premises will include over 6. Each item that is listed on the schedule as requiring checking will be accompanied with the relevant regulation number of BS 7. In addition, the form provides a facility to indicate the outcome of the inspection of each item with either a tick (acceptable condition), a code C1 or C2 (unacceptable condition), NV (not verified), Lim (limitation) or NA (not applicable). Amendment 3 will make a small number of changes to the electrical installation condition report and associated notes, including a requirement to carry out an inspection within an accessible roof space where electrical equipment is present in that roof space. Amendment 3 will make a significant change to the certification of new work: the schedule of inspections (for new work only) has been replaced by examples of items that require inspection during initial verifications (which must be appended to the electrical installation certificate). More information. Important: this article does not include all of the changes that are expected in Amendment Number 3 to BS 7. Edition of the IET Wiring Regulations. For more information refer to the DPC on the IET website. To identify at a glance those changes that might affect you, please see our checklist of changes (see Download section in right- hand column, above). Requirements for Electrical Installations qualifications and training courses. Last Updated: 3. 1 May 2. This qualification ensures that you are up- to- date with the latest industry regulation on wiring and the safe use and operation of electrical equipment and systems. It covers the 1. 7th edition of the IEE Wiring Regulations, which came into force in June 2. These regulations are recognised by the British Standards Institute as a British Standard (BS7.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
August 2017
Categories |