Market-wide Half-Hourly Settlement - latest information.

Why preparation matters

To avoid delays, extra costs, or the need to rebook, it's essential that your site is fully prepared before our visit. The right infrastructure must be in place to allow a safe and efficient meter installation.

Before we attend your site

If your site isn’t ready, your appointment will need to be rescheduled, which may delay your wider project. Please make sure everything is in place ahead of time – take a look at our checklist below.

If you are yet to request a meter installation for your business premises, please contact our New Connections Team.

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Your metering checklist

Everything that needs to be ready before your meter installation visit
For Distribution Network Operator (DNO)/Independent Distribution Network Operator (IDNO)/Building Network Operator (BNO) Low Voltage (LV)/High Voltage (HV) CT-operated metering new connections with a remote metering panel.

Please ensure that your Network Operator has:

  • Installed your service cable, supply cutout/supply switchgear

  • Installed your remote metering panel with a pilot cable using industry recognised metering equipment in line with Elexon Balancing and Settlement Code (BSC) metering codes of practice, and that the secondary cable identification clearly shows the current and voltage references.

  • Provided CT technical details including ratio, class, and burden volt-amperes (VA)
  • Confirmed your supply energisation status
  • Confirmed the earthing arrangement within the remote panel

For HV metering:

  • Provided CT and voltage transformer (VT) technical details
  • Provided a single line diagram

Please ensure that your electrician/Network Operator has:

  • Installed your main load isolator/switchgear and load cables in accordance with the BS 7671 wiring regulations and capacity requirements for your site
For DNO/IDNO/BNO LV CT-operated metering new connections with a combined/separate metering panel and CT chamber

Please ensure that your Network Operator has:

  • Installed your service cable, supply cutout/supply switchgear

  • Installed your combined/separate metering panel and CT chamber using nationally recognised metering equipment, and the secondary cable identification clearly shows the current and voltage references. 

  • Provided CT technical details including ratio, class, and burden volt-amperes (VA)
  • Confirmed your supply energisation status
  • Confirmed the earthing arrangement

Please ensure that your electrician/Network Operator has:

  • Installed your main load isolator/switchgear and load cables in accordance with the BS 7671 wiring regulations and capacity requirements for your site
For temporary LV CT-operated metering new connections

Please ensure that your Network Operator has:

  • Installed your service cable, supply cutout/supply switchgear
  • Installed your combined/separate metering panel and CT chamber using nationally recognised metering equipment, and the secondary cable identification clearly shows the current and voltage references.
  • Provided CT technical details including ratio, class, and burden volt-amperes (VA)
  • Confirmed your supply energisation status
  • Confirmed the earthing arrangement

Please ensure that your electrician/Network Operator has:

  • Installed your main load isolator/switchgear and load cables in accordance with the BS 7671 wiring regulations and capacity requirements for your site
  • Protected by Residual Current Device (RCD) 30ma/100ma or Residual Current Breaker with Overload protection (RCBO) covering the whole installation with an earth stake

Example meter installation diagrams

To help you better understand the setup requirements, we've included downloadable diagrams showing typical CT metering configurations. These visuals are designed to support the checklists above by illustrating how equipment should be arranged on-site.

Why use these diagrams?

  • See how a compliant installation should look
  • Double-check your site setup against industry expectations
  • Share with your electrician or site contractor for clarity

METER INSTALLATION DIAGRAMS

Technical guidance for Building Network Operators
If your electrician is unfamiliar with CTO metering, you should seek guidance from an approved CTO metering service contractor.

  • Current Transformers must be class 0.5s and appropriately sized with the correct burden for the metering installation.
    For guidance, refer to the Elexon Metering Codes of Practice: BSC

  • Secondary cable size should be a minimum of 2.5mm², single insulated.

  • Secondary cable identification must clearly indicate the current and voltage references.

  • Use only industry-recognised CTO metering equipment.

Get in touch

If you have any questions about your meter connection or need help preparing your site, our team is here to support you.

Get in touch

Contact Us

New quote or renewal please call

0330 912 7611 0330 912 7611 0330 053 3356 0330 912 1036

Existing customers please call:

0330 912 4754 0330 912 4754 0330 912 4754 0330 912 4754

We’re open:

Monday, Tuesday, Thursday 9am-5 pm
Wednesday 9am-5pm
(Customer Services 9am-12.00pm)
Friday 9am-4.30pm
Excluding public holidays.

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