the psu is used as previously mentioned non limiting examples of ac plug types are shown in fig2 according to certain embodiments fig8 a c illustrate the use of multiple connectors associated with ac power cables on a psu the implementation illustrated in fig8 a c present an implementation that is backward compatible with the existing iec320 systems and also allow an option for installing a high efficiency ac power cable thus limiting the voltage drop and thereby reducing the power wasted in the interconnect according to certain embodiments fig8 a shows two dissimilar inlets 804 and 806 mounted adjacent to one another on a psu chassis 802 as a non limiting example inlet 806 may the standard iec 60320 c14 and inlet 804 is an inlet with a higher current carrying capacity e g iec 60309 c14 inlet terminal block circular panel mount connector or rectangular panel mount connector such a configuration allows a user to select between the standard iec 60320 c14 inlet 806 and the more robust inlet 804 that has a higher current carrying capacity according to certain embodiments fig8 b and 80 show a sliding door 808 sliding door 808 is configured such that either inlet 804 or inlet 806 can be exposed for use sliding door 808 is a safety feature and covers the inlet that is not in use according to certain embodiments modular cables for direct current dc output from the psu are designed with.