The ornamental design for a powersupplycase for welding, cutting, or heating power, as shown and described.
FIG. 1 is a top perspective view of an embodiment of a power supply case for welding, cutting, or heating power showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right-side elevation view thereof;
FIG. 5 is a left-side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in the figures depict the portions of the power supply case for welding, cutting, or heating power that form no part of the claimed design.