Planned outages will dot Entegrus-powered neighbourhoods throughout Chatham Saturday.
The outages will take place in five different areas between 8:30am and 3pm, lasting around two hours each.
The purpose is to update Entegrus's electrical system in these areas.
All 400 customers that will lose power have been notified by phone. In addition to the affected areas shown above, there will also be outages in the area of McNaughton Ave. and Taylor Trail.