Wharf Road in St Ives will be closed to traffic from Sunday, 21st February, until Friday, 26th February.
The closure will allow Western Power to carry out essential maintenance on its systems.
Vehicles will be diverted along Fore Street, reversing the normal flow of traffic. There will be traffic marshals in place during the day.
Western Power has given assurances that any noisy work will cease by 10.30pm each evening.