Northern Ireland Electricity (NIE) is embarking on a programme of replacing 200,000 electricity metres over the next two years.
NIE, which is responsible for the fitting and maintenance of all electricity meters in Northern Ireland, has appointed MD Electrical and KJM Electrical to carry out the first phase of the work.
KJM has started work within the greater Belfast area, and MD will start work across the country before the end of June.
In a statement the firm said the project will replace any meter which has reached the end of its “recommended lifecycle”.
It said: “If your meter is due for replacement and is inside your property, you will be contacted by one of our contractors to arrange access for their electrician to replace the meter.
“We would greatly appreciate the assistance of customers in facilitating this important work. These contractors are working for NIE and will carry identification.
“We would ask all our customers to always ask for identification before giving access to your home.”