A power management and distribution system, comprising a master control unit configured to receive primary electrical power from a primary power source and first and second power management and distribution devices (4, 4i) for powering personal electronic devices via outlet units (6a, 6b) at passenger seats in an airplane cabin, wherein the master control unit is configured to measure electrical supply power supplied to the power management and distribution devices (4, 4i), compare this measurement with a predefined value, and to indicate via a tri-state signal a switching-off of all unused outlet units in case of higher electrical supply power drawn by the power management and distribution devices (4, 4i) compared to the predefined value of the master control unit, each power management and distribution device comprising: - a first interface for receiving electrical supply power from the master control unit; - a second interface for supplying electrical supply power received at said first interface to another power management and distribution device; - a third interface for supplying electrical supply power received at said first interface to the personal electronic devices via the outlet units (6a, 6b); - a power measurement unit configured to measure the electrical outlet power drawn by the personal electronic devices via the outlet units (6a, 6b); and - a control unit configured to limit the electrical outlet power drawn by the personal electronic devices via the outlet units (6a, 6b), which have not been switched-off by the master control unit, based on the measured electrical outlet power, the control unit being configured to limit the electrical outlet power drawn by each personal electronic device via each outlet unit (6a, 6b) to a finite number of discrete power levels, - wherein the first power management and distribution device is connected to the master control unit via its first interface and the second power management and distribution device is connected via its first interface to the second interface of the first power management and distribution device in a daisy chain fashion. a master control unit configured to receive primary electrical power from a primary power source and first and second power management and distribution devices (4, 4i) for powering personal electronic devices via outlet units (6a, 6b) at passenger seats in an airplane cabin, wherein the master control unit is configured to measure electrical supply power supplied to the power management and distribution devices (4, 4i), compare this measurement with a predefined value, and to indicate via a tri-state signal a switching-off of all unused outlet units in case of higher electrical supply power drawn by the power management and distribution devices (4, 4i) compared to the predefined value of the master control unit, each power management and distribution device comprising: - a first interface for receiving electrical supply power from the master control unit; - a second interface for supplying electrical supply power received at said first interface to another power management and distribution device; - a third interface for supplying electrical supply power received at said first interface to the personal electronic devices via the outlet units (6a, 6b); - a power measurement unit configured to measure the electrical outlet power drawn by the personal electronic devices via the outlet units (6a, 6b); and - a control unit configured to limit the electrical outlet power drawn by the personal electronic devices via the outlet units (6a, 6b), which have not been switched-off by the master control unit, based on the measured electrical outlet power, the control unit being configured to limit the electrical outlet power drawn by each personal electronic device via each outlet unit (6a, 6b) to a finite number of discrete power levels, - wherein the first power management and distribution device is connected to the master control unit via its first interface and the second power management and distribution device is connected via its first interface to the second interface of the first power management and distribution device in a daisy chain fashion. - a first interface for receiving electrical supply power from the master control unit; - a second interface for supplying electrical supply power received at said first interface to another power management and distribution device; - a third interface for supplying electrical supply power received at said first interface to the personal electronic devices via the outlet units (6a, 6b); - a power measurement unit configured to measure the electrical outlet power drawn by the personal electronic devices via the outlet units (6a, 6b); and - a control unit configured to limit the electrical outlet power drawn by the personal electronic devices via the outlet units (6a, 6b), which have not been switched-off by the master control unit, based on the measured electrical outlet power, the control unit being configured to limit the electrical outlet power drawn by each personal electronic device via each outlet unit (6a, 6b) to a finite number of discrete power levels, - wherein the first power management and distribution device is connected to the master control unit via its first interface and the second power management and distribution device is connected via its first interface to the second interface of the first power management and distribution device in a daisy chain fashion.