There are numerous reasons why DNOs may need contacting before the installation of a Low Carbon Technology can take place; these include supply overload, damage to supply equipment, power quality issues or adequacy of earthing. If these issues are identified but not reported prior to installation, our customers are at risk.
Even when the cut out rating is known by the installer, the ratings and utilisation of all local distribution network assets require consideration, and cannot be ascertained without contacting the DNO in that area.
When we do not receive notification of Low Carbon Technology installations, we are unable to map the increased network load associated with the rollout of these technologies. This leads to incomplete modelling, which can in turn cause inadvertent stress on assets and ineffective and uneconomic asset replacement programmes – the cost of these programmes is passed onto UK consumers.
All parties involved in the deployment of Low Carbon Technologies have an obligation to our customers to ensure that we do our utmost to keep our customers safe.
Installers have the responsibility to inform DNOs when making modifications to a service under the following documents:
Wiring Regulations BS7671 132.16 Additions and alterations
Distribution Code DPC5.2.1
IET Electric Vehicle Code of Practice v3 Section 11
Note that the requirements under the Wiring Regulations and the Distribution Code are technology/appliance agnostic and apply to supply alterations from the installation of any appliance.
BEIS has a responsibility to ensure that Low Carbon Technology installers are informing us of installations made under its subsidies – the Renewable Heat Incentives and the Electric Vehicle Homecharge Scheme, etc.