National Grid customers in Weston-super-Mare will be visited as part of a safety inspection programme.
Next month, National Grid Electricity Distribution (NGED) will visit domestic and small business customers in the Bournville and Worle areas to check service termination points.
These points, also known as cut-outs, are the indoor locations where the main incoming electricity service cable and fuse are situated.
They are usually found near the electricity meter.
The inspectors will visually examine NGED and energy suppliers' equipment and record basic details.
No disassembly work will be carried out, and customers' power supplies will not be interrupted during the inspections.
NGED aims to complete 400,000 inspections of cut-outs in homes and small businesses across the South West, South Wales, and the Midlands every year as part of a rolling programme over the next 20 years.
Richard Brady, NGED's policy engineer heading the inspection programme, said: "The UK is recognised internationally as having one of the most resilient and safe energy systems, and this inspection programme underlines our commitment to the highest safety standards.
"Inspectors will visually examine cut-outs to check they are working as they should, taking photos and notes for our records.
"In the unlikely event of a defective cut-out being found, NGED engineers will be sent to carry out repairs at no cost to the customer.
"Visits will also be an opportunity to confirm what types of low-carbon technologies (LCT) are connected to our network, for example, electric vehicle chargers and solar panels, to help our planning for future load growth on the network, and enable LCT items to be connected quicker in the future as we will have records of the cut-out asset on site and its condition.
"These are important safety visits but we understand they could be inconvenient for customers and apologise in advance if this is the case."
Inspectors will be clearly identifiable as working for NGED and will be able to present ID and authorisation to enter properties.
Customers will have the option of taking their own photographs of their cut-out and meter and sending them to NGED, who will decide if a follow-up visit is needed.
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