Wiring a new sub-panel to an isolation transformer is one method of wiring for balanced power. With a balanced power system, the power sent to each "hot" bus of the power panel is 50 percent per bus. This means that the total power of the system is split evenly between each side of the panel. Balanced power systems have the advantage of reduced noise generation. This characteristic makes this type of system great for audio.
1.Shut off the power feeding the isolation
mains transformer at the main power panel. Use the documentation supplied with the isolation transformer to locate the center-tap wire on the secondary side of the transformer. Connect that wire to the sub-panel's ground bus bar.
2.Route the remaining two wires from the secondary side of the isolation transformer into the sub-panel. Loosen the two "hot" wire main bus screws in the top center section of the sub-panel. Strip 1/2-inch of insulation off of the two wires.
3.Insert each wire separately into each of the wire screw terminals.Tighten the screws to hold the wire in place. Do not over-tighten these screws. If there is a neutral wire, connect it to the neutral common bar. Once these screws are tight, close the sub-panel.
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