Does One Fuse Cover Both Voltage Inputs?

Yes. The rating on the fuse is 1/2A, 600V, Class CC, 200KAIC, UL Listed, RoHS compliant.

If the fuse in the power meter is blown, can it be repaired?

Yes. The fuse is a repairable item by returning the meter to the factory.

Do I need fused leads when installing the power meter?

No. The power meter needs to be downstream from a UL-approved circuit breaker.