The ornamental design for a transferswitch for alternativepower sources to a loadcenter, as shown and described.
FIG. 1 is a front view of a transfer switch for alternative power sources to a load center, showing our new design;
FIG. 2 is a left side view thereof;
FIG. 3 is a right side view thereof;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The broken line showing of circuit breakers in FIG. 1 and load center panels in FIGS. 2 through 5 illustrates environmental detail and forms no part of the claimed design.