1. Switch off the power.
  2. Disconnect the hot wire (L1) from the breaker.
  3. Insert the hot wire (L1) through the L1 hole of DDM710P. Insert the Neutral through the L2/N hole of DDM710P.
  4. Connect the hot wire (L1) back to the breaker.
  5. Drive down 2 small tap screws, penetrating the hot wire and neutral insulation, picking up the voltage reference and powering the meter.