Safety Bulletin B336 Issue 01 Change In Approved Procedures DSR 01 020

DSR 01 020 – Connecting Cables to LV Boards – v7.0 in the Approved Procedures was superseded by Connecting Cables to LV Boards, LV Pillars & Transformer Mounted Feeder Cabinets (TMFCs) v8.0 on the 1st June 2025. 

Safety Bulletin B336 - Issue 01 - Change in Approved Procedures - DSR 01 020

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<div>UK Power Networks (Operations) Limited standard terms for carrying out connections work can be found at <a rel="noopener" href="https://www.ukpowernetworks.co.uk/internet/en/our-services/public-highway/Connection%20T&amp;Cs%20Sept2016%20v7.pdf" target="_blank">Connection and Diversionary Works Terms and Conditions</a> or obtained by request in writing to Head of Connections Services, Highway Services, Disconnections, General Enquiries and Smart Metering, UK Power Networks (Operations) Limited, 5, York Way, Borehamwood, Hertfordshire, WD6 1DJ. These Terms and Conditions will be the basis for any work carried out following this request.</div>

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<div>UK Power Networks (Operations) Limited standard terms for carrying out connections work can be found at <a rel="noopener" href="https://media.umbraco.io/uk-power-networks/g0mjuzgy/connection-tcs-sept2016.pdf" target="_blank" title="Metered Connections Terms and Conditions">Connection and Diversionary Works Terms and Conditions</a> or obtained by request in writing to Head of Connections Services, Highway Services, Disconnections, General Enquiries and Smart Metering, UK Power Networks (Operations) Limited, 5, York Way, Borehamwood, Hertfordshire, WD6 1DJ. These Terms and Conditions will be the basis for any work carried out following this request.</div>

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If you need this application form in large font, EasyRead or Braille, please call <a href="tel:08001699970">0800 169 9970</a> or email us at <a href="mailto:psr@ukpowernetworks.co.uk">psr@ukpowernetworks.co.uk</a>.
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If you would like to receive a copy of our Priority Services Register application form in large font, in EasyRead, or in Braille, please call <a href="tel:08001699970">0800 169 9970</a> or email us at <a href="mailto:psr@ukpowernetworks.co.uk">psr@ukpowernetworks.co.uk</a> and we’ll be happy to arrange this for you. You can also download our EasyRead form and language forms from our <a rel="noopener" href="https://www.ukpowernetworks.co.uk/power-cut/priority-services/resources-and-downloads" target="_blank">Priority Services resources and downloads web page</a>.
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Please use the file upload section below to upload supporting documents including: Schematic diagram for the proposed scheme:*
Details of your export limiting scheme such as G100 type test reference or electricity storage manufacturer’s statement of compliance:*
<a rel="noopener" href="https://www.energynetworks.org/industry-hub/resource-library/?search=EREC+G100" target="_blank" title="Go to the Energy Networks Associations website to view more information about EREC G100" data-anchor="?search=EREC+G100">View more information regarding EREC G100</a>.
G98 type verification test report:*
Need help finding your type verification test reports? <a rel="noopener" href="https://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">Enter details here</a>.
Additional Attachments:
Computer print out (where possible) or other schedule of protection settings;
Electricity meter(s) make and model;
Datasheets of inverter and other installed equipment
* Mandatory items

Your data We are committed to protecting and respecting your privacy. The information you provide will not be used for marketing purposes but we work with two research organisations, Rant &amp; Rave and Explain Research who may contact you for feedback about our service. Your feedback is shared with us and Ofgem, our regulator. We will not sell or pass on your information to any other third party for any purpose. For more information on how we will treat your personal data, please read our <a rel="noopener" href="https://www.ukpowernetworks.co.uk/privacy-policy" target="_blank" title="View our Privacy Policy">Privacy Policy</a>.
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<div class="intro__icon-box">You should not proceed with this application. Your proposed installation falls under EREC G98. Your installer is required to advise us of the intention to use the electricity storage device no later than 28 days (inclusive of the day of commissioning), after the electricity storage device is commissioned. <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources" target="_blank" title="Go to our Distribution Energy Resources webpage">View more information</a>.</div>

<div class="intro__icon-box">You should not proceed with this application. If the rated capacity of your installation is 50kW or less (three phase) or 17kW or less (single phase) and you are using EREC G99 type tested inverters please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a>. If your installation is not eligible for the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a> please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre4">G99 standard process</a>. To determine whether your inverters are EREC G99 type tested please visit the <a rel="noopener" href="http://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">ENA Type Test Verification Report Register</a>.</div>

<div class="intro__icon-box">You should not proceed with this application. Your proposed installation falls under EREC G98. Your installer is required to advise us of the intention to use the electricity storage device no later than 28 days (inclusive of the day of commissioning), after the electricity storage device is commissioned. <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources" target="_blank" title="Go to our Distribution Energy Resources webpage">View more information</a>.</div>

<div class="intro__icon-box">You should not proceed with this application. If your Distributed Energy Resources (DER) will not be connected via EREC G98 type tested inverters please follow the relevant process as described below:</div>
<ul>
<li>If your Distributed Energy Resources (DER) will be connected via EREC G99 type tested inverters and the rated capacity of your installation is 50kW or less (three phase) or 17kW or less (single phase) please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a>. To determine whether your inverters are EREC G99 type tested please visit the <a rel="noopener" href="http://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">ENA Type Test Verification Report Register</a>.</li>
<li>For all non-type tested inverters please follow the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre4">G99 standard process</a>.</li>
</ul>

<a rel="noopener" href="https://www.energynetworks.org/industry-hub/resource-library/" target="_blank" title="View more information regarding EREC G100">View more</a> information regarding EREC G100.

<div class="intro__icon-box">You should not proceed with this application. If the export capacity of your installation will not be limited to maximum of 16A per phase you need to follow either the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre3">G99 simple process</a> or the <a rel="noopener" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" data-anchor="#pre4">G99 standard process</a> depending on the rated capacity of your installation.</div>

To determine whether your inverters are EREC G98 type tested please visit the <a rel="noopener" href="http://www.ena-eng.org/ProductTypeTestRegister/Product.aspx" target="_blank" title="Go to the Energy Networks Association's website to view the ENA Type Test Verification Report Register">ENA Type Test Verification Report Register</a>.

You should not proceed with this application. If your installation does not comply with the emission limits of Stages 1 or 2 of IEC Technical Report 61000-3-4 you will need to ensure compliance prior to being offered a connection to the distribution network.

<a rel="noopener" href="http://www.dcode.org.uk/assets/images/ENA_ER_G5_Issue_4_Amendment_1_(2005).pdf" target="_blank" title="View more information on emission limits and EREC G5/4-1">View more</a> information on emission limits and EREC G5/4-1.

<div class="p-rich_text_section intro__icon-box">You should not proceed with this application.</div>
<div class="p-rich_text_section"> Our G99 fast track process is only available for single premises connections. </div>
<div class="p-rich_text_section">For multiple premises please follow the relevant process as described below:</div>
<div class="p-rich_text_section"></div>
<ul class="p-rich_text_list p-rich_text_list__bullet" data-stringify-type="unordered-list" data-indent="0" data-border="false" data-border-radius-top-cap="false" data-border-radius-bottom-cap="false">
<li data-stringify-indent="0" data-stringify-border="0">If the rated capacity of your installation is 11.04kW or less (three phase) at 400V or 3.68kW or less (single phase) at 230V please follow the <a rel="noopener" tabindex="-1" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre2" target="_blank" title="Go to our Distribution Energy Resources webpage" class="c-link" data-stringify-link="https://www.ukpowernetworks.co.uk/internet/en/our-services/list-of-services/electricity-generation/distributed-generation-connection/#pre2" data-sk="tooltip_parent" data-remove-tab-index="true" data-anchor="#pre2">G98 multiple premises connections process</a>.</li>
<li data-stringify-indent="0" data-stringify-border="0">If the rated capacity of your installation is 50kW or less (three phase) or 17kW or less (single phase) please follow the <a rel="noopener" tabindex="-1" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre3" target="_blank" title="Go to our Distribution Energy Resources webpage" class="c-link" data-stringify-link="https://www.ukpowernetworks.co.uk/internet/en/our-services/list-of-services/electricity-generation/distributed-generation-connection/#pre3" data-sk="tooltip_parent" data-remove-tab-index="true" data-anchor="#pre3">G99 simple process</a>.</li>
<li data-stringify-indent="0" data-stringify-border="0">If your installation is not eligible for either of the above please follow the <a rel="noopener" tabindex="-1" href="https://www.ukpowernetworks.co.uk/electricity/distribution-energy-resources#pre4" target="_blank" title="Go to our Distribution Energy Resources webpage" class="c-link" data-stringify-link="https://www.ukpowernetworks.co.uk/internet/en/our-services/list-of-services/electricity-generation/distributed-generation-connection/#pre4" data-sk="tooltip_parent" data-remove-tab-index="true" data-anchor="#pre4">G99 standard process</a>.</li>
</ul>

By making this application you understand and agree to the Terms and Conditions that:
<ul>
<li>You must install and operate the electricity storage and generation units exactly as described in the application form and in accordance with the EREC G98, EREC G100 and EREC G5/4-1;</li>
<li>If UK Power Networks has reason to believe that the electricity storage and generation units have been installed or are being operated otherwise than exactly as described in the application form and in accordance with the EREC G98, EREC G100 and EREC G5/4-1 it may de-energise the connection and require that witness tests are undertaken in its presence and/or that the customer undertakes such remedial works as it shall deem appropriate; and</li>
<li>The customer shall bear its own and UK Power Networks’ costs associated with any witness tests and / or remedial works that UK Power Networks may require to be carried out if it has reason to believe that the electricity storage and generation units have been installed, or are being operated, otherwise than exactly as described in the application form and in accordance with the EREC G98, EREC G100 and EREC G5/4-1.</li>
</ul>

Please be aware that you are required to provide the commissioning sheets on the day after the planned commissioning date. The contact details of the relevant team will be included in the confirmation email you will receive within 10 working days after submitting the application.
Note: Your planned commissioning date must be at least 10 working days from the date of application, but not more than 3 months in advance as our connection offers are only valid for 3 months.

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Update from the team

<div>UK Power Networks (Operations) Limited standard terms for carrying out connections work can be found at <a rel="noopener" href="https://media.umbraco.io/uk-power-networks/rclbkfju/tscsumc.pdf" target="_blank" title="Unmetered Connections Terms and Conditions">Connection and Diversionary Works Terms and Conditions</a> or obtained by request in writing to Head of Connections Services, Highway Services, Disconnections, General Enquiries and Smart Metering, UK Power Networks (Operations) Limited, 5, York Way, Borehamwood, Hertfordshire, WD6 1DJ. These Terms and Conditions will be the basis for any work carried out following this request.</div>

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