Pro Installer 400A Dual Bank Control Switch - MC10. Another addition to our multi award winning Pro Installer EZ Mount range, the innovative Dual Bank Control switch is like 3 switches in one, House, Start, and Emergency Parallel. Offering easy intuitive control for the boater, the Dual Bank Control switch features a unique isolated-On position which allows use of house loads and VHF radio if the engine needs to be electrically isolated, or allows the engine to be isolated during servicing while