Refer to the diagram. Each of the supply side EMT conduits contain three 500 KMIL (MCM) copper THW service conductors. One conductor in each conduit in is connected parallel for each of three phases. As shown, a seprate bonding jumper is installed from each conduit to the grounded bus terminal. Each bonding jumper must be a minimum size ____ AWG copper.

Refer to the diagram. Each of the supply side EMT conduits contain three 500 KMIL (MCM) copper THW service conductors. One conductor in each conduit in is connected parallel for each of three phases. As shown, a seprate bonding jumper is installed from each conduit to the grounded bus terminal. Each bonding jumper must be a minimum size ____ AWG copper.