BRIDGTON – An estimated 4,870 Central Maine Power Co. customers in the Lakes Region will lose their electrical service early Sunday morning.

The towns of Casco, Harrison, Naples, Otisfield and Sebago will be affected while an estimated 60 workers and 30 trucks transfer customers to a new circuit. The work will take place between midnight and 6 a.m., mostly on routes 121 and 11 and their side roads.

“It’s basically creating redundancies so if we have a fault in one area, we can better reroute around it,” CMP spokeswoman Gail Rice said.

The circuits affected by the work are supplied from a Raymond substation, which earlier this year was renovated with the addition of a transformer, two new breakers, a capacitor bank, and communications equipment.

Rice said wires would be transferred to newer poles, which are taller and more closely spaced to accommodate more wires.

CMP has already been in touch with residences and businesses that require electricity for life support or other essential functions.

“We do that as far in advance as possible,” Rice said.

The early hour work will minimize inconvenience to customers, she said, adding that she does not believe noise will be an issue. Rice said the power needs to be shut off to allow workers to operate safely and efficiently, and asked any drivers to be considerate of the crews.

In case of inclement weather, the work will be delayed until Sept. 30.