Abstract: A cell for a motor control center (MCC) includes an isolation switch configured to receive power from a power source and a contactor configured to receive power from the isolation switch and to selectively provide power to a load. The isolation switch may include a first and second contacts that are configured to engage and disengage from one another and at least one insulating barrier surrounding the first and second contacts and configured to maintain insulation around the first and second contacts when engaging and disengaging the first and second contacts. The at least one insulating barrier may include a first insulating barrier surrounding the first contact and a second insulating barrier surrounding the second contact and configured to be inserted into the first insulating barrier such that the first insulating barrier at least partially overlaps the second insulating barrier when the first and second contacts are engaged.