myCableEngineering.com

ERA 69-30 sustained current ratings is a nine-volume set of recommendations, published by Edif ERA.  The calculation of cable rating follow t he derating factor method, see  . 

ERA is a UK based organisation, and these standards reflect this.  The user of ERA is particularly popular amongst DNO (district network operators) and supply authorities. 

Each volume covers a particular cable type, for example, part V is for 600/100 V and 1900/33000 V cables with thermosetting insulation. Typically the recommendation cover both three-phase a.c. 50 Hz and d.c. are for in air and buried cable installations.

In addition to current capacity, the recommendations provide estimates of power dissipation and a guide to average soil temperatures within the UK.

Building CodeHub

ERA REPORT 69-30 Current rating standards. PT III Sustained current ratings for 600/1000 V & 1900/3300 V cables with 70°C thermoplastic insulation (ac 50 Hz and dc)

Description.

This report, which is Part III of a series, provides current ratings for 70°C thermoplastic insulated cables. Ratings given in this report are based on the cable dimensions in BS 6346:1969. These ratings are also considered to be applicable to cables having a similar construction.

Ratings are given for cables installed direct in the ground, in underground ducts and in air. The conductor temperature limit of 70°C, on which ratings are based, has been adopted on the recommendations of British cable manufacturers. Ambient temperatures adopted for tabulation are values suitable for most UK installations.

Attention is drawn to the fact that the use of the ratings given in the tables is restricted to circuits provided with excess current protection whose designed minimum operating current does not exceed 1.45 x those ratings when the cables are run in air or in ducts and not more than 1.3 x those ratings when the cables are laid direct in the ground.

When the circuit protection does not comply with this requirement the cable required for a given continuous load current should be chosen in relation to (a) the tabulated ratings and (b) the minimum current at which the excess current protection is designed to operate, in accordance with the directions given in Section five.

For assistance with locating previous versions, please contact the information provider.

This report was revised in 2009

This resource is cited by:

This document is cited by:.

ERA REPORT 69-30 PT III is cited by AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules)

This resource does not cite any other resources.

This resource does not cite any other resources., table of contents.

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electrical research association report no 69 30

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Low Voltage Cables / Current Ratings And Voltage Drop List / Current Rating And Voltage drop for cables & wires Upto and including 600/1000V.

Current rating and voltage drop for cables & wires upto and including 600/1000v..

Current ratings of cables given in tables below are based on the ERA(Electrical Research Association) Report 69-30, Part V(for XLPE cables) and part III(For PVC cables) which is accepted world wide. Single core copper, XLPE insulated armoured / unarmoured cables:

Operating Conditions

Ambient Air temperature   30°C Ground Temperature:       20°C Depth of Laying:              0.5 m Thermal Resitivity of soil: 1.2 K.m/W

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Current Rating Standards for Distribution Cables (ERA69-30) Unknown Binding – 1 Jan. 1977

  • Print length 44 pages
  • Publisher E.R.A
  • Publication date 1 Jan. 1977
  • See all details

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  • ASIN ‏ : ‎ B0018LNT8A
  • Publisher ‏ : ‎ E.R.A (1 Jan. 1977)
  • Unknown Binding ‏ : ‎ 44 pages

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icon-archive Archive of the Electrical Research Association

Archive consisting of Council and committee minutes, research papers, reports and report indexes.

Grace's Guide To British Industrial History

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 162,926 pages of information and 245,514 images on early companies, their products and the people who designed and built them.

electrical research association report no 69 30

Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 147,919 pages of information and 233,587 images on early companies, their products and the people who designed and built them.

Electrical Research Association

electrical research association report no 69 30

Previously known as British Electrical and Allied Industries Research Association

Laboratories at Perivale and Leatherhead.

By 1937 was commonly referred to as Electrical Research Association [1]

c.1956 Opened Leatherhead laboratories; staff and work transferred from the Perivale laboratories

1979 Name changed to ERA Technology Ltd

2003 Acquired by Cobham plc

Sources of Information

  • ↑ Nature 20 Feb 1937
  • Town - Leatherhead
  • Societies and Associations

Grace's Guide web site design is Copyright © 2021 by Grace's Guide Ltd. The text of this web site is available under the Creative Commons Attribution-ShareAlike License ; additional terms may apply. By using this site, you agree to the Terms of Use and Privacy Policy .   Maintained by Sapere Software

Over 100 years of Engineering History.

Founded in 1920 the era has been at the forefront of promoting and supporting british engineering..

Founded in 1920 under the name “The British Electrical and Allied Industries Research Association” and quickly became known as the “The Electrical Research Association” (ERA).

electrical research association report no 69 30

The earliest known ERA logo

The E.R.A quickly established itself as one of the successful co-operative industrial research associations.

It was unique in that it had not only the support of those in and connected with the industry but also those engaged in electricity supply and the users of electrical products.

Previously, the Institution of Electrical Engineers had represented users-interests. The E.R.A gave a voice to both those users-interests and manufacturers. Bridging the gap between the two through the E.R.A Council and Research Committees.

The Association dealt with problems that industry were unable or unwilling to tackle. Working cooperatively with buyers and sellers of Electrical products to drive forward research and technological innovation.

The association was funded jointly by the Governments Department of Scientific and Industrial Research and from subscriptions payments from its member companies. The initial government grant was designed to last only five years.

electrical research association report no 69 30

E.B Wedmore, C.B.E, M.I.E.E, F.Inst.P. ERA Director 1920 – 1944

Initially the association was joint funded by the Governments Department of Scientific and Industrial Research and from subscriptions from its member companies. 

That initial government grant was designed to last only five years; covering its’ initial work developing new technologies for insulators and switches.

As those first five years drew to a close the future of the Association was uncertain. 

In 1924 the ERA did not know whether the government grant that initially funded it would be renewed. 

However, the ERA’s president, Mr Llewelyn Birchall Atkinson, was able to negotiate the continuation of the grant going into 1926 on the condition that the government would meet half of the Association’s costs that year, but gradually reduce its contribution over the following five years to a fraction of that amount.

electrical research association report no 69 30

The ERA Information Bureau functioned as a clearing house for published information on technical and scientific research. Up to date records were maintained in a comprehensive card index that covered extensive data available in the Associations technical reports.

electrical research association report no 69 30

An early Transportable Surge Generator

As the association grew it required more space for its work. In 1936 a new auxiliary laboratory at Perivale was opened by the Duke of York.

Its purpose was to supplement the research services that the Electrical Research Association provided from its headquarters with government support in the interests of the electrical industry and the wider community.

electrical research association report no 69 30

Perivale, Middlesex The Auxiliary laboratory at Perivale supplemented the research services that the Association provided from its headquarters

An ‘Essential Undertaking’

During the Second World War the ERA gave direct assistance to the war effort. The Ministry of Labour clarified it as an “essential undertaking”.

Wartime activities included the development of radar and mine detection equipment.

electrical research association report no 69 30

Part of the ERA integrated computer ( 1956 )

New Laboratories And Offices

In 1957 the headquarters of the ERA were opened in Leatherhead, Surrey. The ERA’s existing staff and work transferred from their previous home at Perivale laboratories

The 18-acre campus included major new laboratories and offices and has continued to the present day with the addition of several large purpose-built facilities.

electrical research association report no 69 30

Switch Gear Laboratories Leatherhead, Surrey

The First Privatised Research Association

Income for the ERA had traditionally come from subscriptions from its member companies and the UK Government grants. In 1969 the ERA began a major restructuring project to reflect the rapidly changing technology base of the UK Engineering sector.

By becoming the first ‘privatised’ research association the ERA was able to generate income from single client and multi-client projects.

electrical research association report no 69 30

High Voltage Laboratory 1970 A new High Voltage Laboratory begins constructions

ERA Technology LTD.

ERA formally changed its name from The Electrical Research Association Ltd to its present name, ERA Technology Ltd in September 1979.

The organisation would act as Britain’s leading independent consulting organisations.

electrical research association report no 69 30

An assistant records loans from the ERA Library

electrical research association report no 69 30

Gone is the index library. Replaced by cutting edge technology like the new Electra computer form printer. The single part computer printout produces multiple collated copies as required. Easily filed in a standard file or bound in book form.

1971 – 1990

During the 1970s, 1980s and 1990s ERA continued to grow and develop into new research areas, including RF technology and electronic systems.

It also expanded into providing a wide range of engineering consultancy services for mechanical as well as electronic and electrical systems.

In doing so it established itself as one of Britain’s leading independent consulting organisations at the cutting edge of technology development.

electrical research association report no 69 30

ERA Braille Transcriber A team demonstrated a new special purpose card reader and Braille transcriber controller and interface

electrical research association report no 69 30

A new computer based information retrieval system is based on paper-tape punch. Developed for the commercial data market-analysis in 1971

electrical research association report no 69 30

The Circuit Design Department The ERA operated a information service on manufacturers products and appliances

The ERA Foundation

In January 2001, ERA’s operation was transferred to a new trading company while the original company, limited by guarantee, was renamed The ERA Foundation.

The trading operation retained the name ERA Technology and was run as a wholly commercial enterprise, responsible to its shareholders.

Sale of ERA Technology

In September 2003, the company announced it would sell the entire issued share capital of ERA Technology to Cobham PLC.

Creation of the ERA Foundation

The proceeds of this sale and sale of the property company formed the basis for the ERA Foundation’s endowment funds and the basis for the Foundation’s continuing support for the electrotechnology sector and encouraging more young people to take up engineering careers.

electrical research association report no 69 30

The ERA Foundation helped support the creation of the Royal Academy of Engineering’s Enterprise Hub In Acknowledgment of the support received the Hub created the ERA Enterprise Fellowships.

Initiatives to Support UK Engineering

The ERA Foundation made major donations to The Royal Academy of Engineering and the Royal Commission for the Exhibition of 1851.

A donation of £8M was given to the Royal Academy of Engineering and £2M to the Royal Commission for the Exhibition of 1851

These endowments enabled both organisations to fund new activities in the general field of engineering and especially those of electrotechnology, telecommunications and IT systems.

Enabling the creation of new prizes, funding of schemes to raise the profile of engineering as a career, and the creation of industrial fellowships.

electrical research association report no 69 30

The ERA Foundation were proud to sponsor a Young Engineers Award for Innovation Attila Emecz, Executive Secretary to the ERA Foundation, congratulates Raphael Njoku from Winchester College in 2017

electrical research association report no 69 30

The ERA awards another round of Arkwright scholarships in 2019

Name Changes

While the ERA Foundations course has remained steady since its creation in 2001, its sister commerical entity, ERA Technology, has underone a number of changes.

In March 2009, ERA Technology, Culham Lightning and Vector Fields assumed a new collective name Cobham Technical Services as part of a rebarnd by its FTSE 100 parent company Cobham.

In March 2011, Cobham PLC divested its engineering consultancy group of Cobham Technical Services to EDIF Group who then returned to the name “ERA Technology Ltd”. This was rapdily followed in November 2011 by a second acquisition with the buyout of NDE Global Technical Services GmbH.

In 2016 EDIF was bought by RINA who folded its newly acquired “ERA engineering consultancy” and the “NDE inspection business” brands into itsown.

This marked the end of the existence of the ERAs commerical brand leaving the foundation to continue its work under the ERA banner.

This year the foundation celebrates its centenary.

Over the last century the foundation’s objectives have remained the same. To ensure the important role that the electech manufacturing sector plays in the UK economy is recognised; to support the next generation of UK engineers, and to encourage entrepreneurship, innovation and technical excellence in individuals and organisations.

The ERA Foundation will strive to continue that mission into the future.

Planning for the future.

Over the next decade, the Foundation will continue to support the UK electech manufacturing sector and to bring more young people into engineering careers

While the foundation’s objectives have remained the same for the last 100 years we are constantly assessing how to best achieve our aims as the political and economic climate evolves.

In response to the development of Local Industrial Strategies, we will be focusing our efforts to better coordinate action between our existing STEM skills partners at a regional and city level. Increasing the impact of existing STEM skills programmes. We believe that this approach allows us to build on unique local strengths and ensures communities reach their economic potential.

We have renewed our support for new policy initiatives which support the high-value manufacturing and electech sectors, while directly supporting initiatives aimed at encouraging small and medium enterprise companies to engage more proactively in the opportunities presented by the growing digital economy.

Over the next decade, the Foundation will continue to support our world-class fellowship programmes with our partners, The Royal Commission of the Exhibition of 1851, The Royal Academy of Engineering and The Royal Society.

Under the Foundations’ Born to Engineer brand, we will sponsor awards and programmes which encourage and recognise star pupils and teachers leading the way of creating the next generation of UK Engineers.

To do all this we will work with organisations who share our principles. Ensuring that all our partners continue to have a significant stake in what we do and how we do it.

If you, your organisation, investment or programme could benefit from working with us, get in touch.

We will keep fighting for all libraries - stand with us!

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COMMENTS

  1. PDF Current Rating and Voltage drop for cables & wires Up to and including

    Current ratings of cables given in tables below are based on the ERA (Electrical Research Association) Report 69-30, Part V (for XLPE cables) and part III (For PVC cables) which is accepted worldwide. Single core copper, XLPE insulated armored / unarmored cables. Nominal Area of Conductor In Air In Ground In Duct

  2. myCableEngineering.com > ERA 69-30

    ERA 69-30. Last updated on 2016-10-07 1 mins. to read. ERA 69-30 sustained current ratings is a nine-volume set of recommendations, published by Edif ERA. The calculation of cable rating follow t he derating factor method, see . ERA is a UK based organisation, and these standards reflect this. The user of ERA is particularly popular amongst DNO ...

  3. ERA REPORT 69-30 PT V Sustained current ratings for 600/1000 ...

    ERA REPORT 69-30 PT V is cited by AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules) ... ERA REPORT 69-30 PT V Sustained current ratings for 600/1000 V & 1900/3300 V cables with 90°C thermosetting insulation (ac 50 Hz and dc). Show what documents this resource is CITED BY Show what documents this ...

  4. ERA REPORT 69-30 Current rating standards. PT III Sustained ...

    ERA REPORT 69-30 Current rating standards. PT III Sustained current ratings for 600/1000 V & 1900/3300 V cables with 70°C thermoplastic insulation (ac 50 Hz and dc) This document is CITED BY: AS/NZS 3000:2007. ERA REPORT 69-30 PT III is cited by AS/NZS 3000:2007 Electrical installations (known as the Australian/New Zealand Wiring Rules) Back

  5. Cable Group Rating

    I have modeled some 11kV XLPE cables according to IEC287 and confirmed the values with the cable manufacturer. However, most cable manufacturers refer to ERA 69-30. The IEC287 models provides ampacity levels up to 15% lower than the manufacturer's derating tables that refer to ERA 69-30 Part 3. I will appreciate any thoughts on this.

  6. Back to the Forum

    The ERA 69-30 report assumes a soil thermal resistivity of 1.2 K.m/W, which corresponds with typical soil thermal resistivity for the UK in Annex A (A.22.2) of BS IEC 60287-3-1 Electric cables - Calculation of the current rating: Operating conditions - Site reference conditions, although this is considered to be a broad-brush statement.

  7. Era Reports 69.30 Part 1 Paper Cables

    ERA REPORTS 69.30 PART 1 PAPER CABLES - Free download as PDF File (.pdf) or read online for free.

  8. Current Rating And Voltage drop for cables & wires Upto and including

    Current ratings of cables given in tables below are based on the ERA(Electrical Research Association) Report 69-30, Part V(for XLPE cables) and part III(For PVC cables) which is accepted world wide. ... Gulf Cables & Electrical Industries Group Co. KSCP. PO Box 1196, Safat 13012, Kuwait. T.: +965 - 24645500 F.: +965 - 24675305, 24675850 E: info ...

  9. Current Rating Standards 69-30

    Current Rating Standards 69-30: Calculation of cyclic and emergency current ratings for cables laid direct in the ground or in ducts for cables up to and including 19/33 kV, Part 4 Volume 74, Issues 3-586 of ERA project Volume 89, Issue 94 of ERA report: Author: Mark Coates: Contributor: ERA Technology Ltd. Engineering Materials Division: Publisher

  10. Electrical Research and Development Association

    We support Electrical Industries to be more competitive by way of customized R&D and access to New Laboratory Infrastructure. Electrical Research and Development Association (ERDA) is a premier Electrical & Power sector Research & Development Organisation of the nation providing services to the Power Sector in three technical areas of ...

  11. Guide to the IET Wiring Regulations: 17th Edition IET Wiring

    Electrical Research Association (ERA) report on armoured cables with external CPCs 17. A4 sample versions of ECA BS 7671 certi˜ cates and forms Guide to the IET Wiring Regulations: 17th Edition IET Wiring Regulations (BS 7671:2008 incorporating Amendment No. 1:2011), First Edition. Electrical Contractors' Association.

  12. Current Rating Standards for Distribution Cables (ERA69-30)

    Buy Current Rating Standards for Distribution Cables (ERA69-30) by Electrical Research Association (ISBN: ) from Amazon's Book Store. Everyday low prices and free delivery on eligible orders.

  13. ERA Foundation Ltd

    ERA Foundation Ltd is the current name of the research association founded as the British Electrical and Allied Industries Research Association in 1920.,By 1925, the association was commonly referred to as the Electrical Research Association (ERA). It was funded jointly by the Department of Scientific & Industrial Research, industry and member companies. Prior to ERA, there had been no real ...

  14. British Electrical & Allied Industries Research Association

    Established in 1920 as the British Electrical and Allied Industry Research Association, but generally known as The Electrical Research Association or ERA, the association was jointly funded by the Department of Scientific and Industrial Research, industry, and member companies. ERA provided research and technology innovation within co-operative electrical research in the UK.,ERA was recognised ...

  15. ERA Technology

    ERA Technology is a UK-based technology organisation with a history dating back to 1920. ERA Technology provides specialist engineering consultancy to owners and operators of large-value capital assets and systems; helping clients to reduce risk, improve operational performance and comply with functional safety and regulatory requirements.

  16. About ERDA

    ERDA is a premier Electrical & Power sector Research & Development Organisation of the nation providing services to the Power Sector in three technical areas of "Testing & Evaluation", "Field Services", and "R&D and Expert Services". These services are provided through its 28 state-of-the-art centres located at its head office in ...

  17. Archive of the Electrical Research Association

    The Electrical Research Association collection is made up of five series': Council minutes, research, indexes, a volume combining council minutes and research, and miscellaneous. The research minutes constitute the main body of the collection and comprise thirty sub-series of various research areas.

  18. Electrical Research Association

    Electrical Research Association - Graces Guide. Registered UK Charity (No. 115342) Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 162,870 pages of information and 245,382 images on early companies, their products and the people who designed and built them.

  19. History of the British Electrical & Allied Industries Research Association

    2003. 2005. 2016. 2020. 1920. Founded in 1920 under the name "The British Electrical and Allied Industries Research Association" and quickly became known as the "The Electrical Research Association" (ERA). The earliest known ERA logo. The E.R.A quickly established itself as one of the successful co-operative industrial research ...

  20. 1967 Steam Tables, Thermodynamic Properties of Water and Steam

    The Electrical Research Association. Publication date 1967-01-01 Publisher Edward Arnold Collection printdisabled; internetarchivebooks; inlibrary Contributor Internet Archive Language English. Notes. inherent skewed page. Access-restricted-item true Addeddate 2023-03-07 00:00:11

  21. eProc-Suite

    Tender Id :69657. Name Of Work : Supply and installation Fully Automated Solar Sun Simulator with Temperature Controlled Chamber. Corrigendum : Extension of bid due date. Estimated Contract Value : 46200000.00. Last Date & Time For Submission : 24-05-2024 17:45:00. Total No:10. PIND-2324-01569. ERDA-Electrical Research and Development Association.

  22. Vendor Registration

    Head Office ERDA, Vadodara ERDA Road, GIDC, Makarpura, Vadodara - 390 010 Gujarat, India. Tel.: +91 265 3043129-3043131, 3043133, 2642942, 2642964, 2642377 Toll Free ...

  23. PDF ELECTRICAL RESEARCH AND DEVELOPMENT ASSOCIATION ffi

    Certificate No, : T{071 ELECTRICAL RESEARCH AND DEVELOPMENT ASSOCIATION (Accredited by the National Accreditation Board for Testing and Calibration Laboratories, Go\rt. of lndia) ERDA Road, Makarpura Industrial Estate, Vadodara-390 010, India. ffi EPABX Fax E-mail Web +91 (0265) 2642942,2642964,2642372,3043128 / 29 I gO I 31 / 39. +91 (0265 ...