Electrical question

The micro wave is not used too often but is the long term not good?..I have a old Panamax with the tv and the modem router plugged into for convenience on the same line and has a volt meter on the face plate…it shows 120 to 122 constantly unless she turns on the microwave on for a few minutes…other wise it would be a pain to run a separate line in, there is room in my electrical panel…

‘might be putting a strain on my Dac and streamer too..

Technically the microwave should be on its own circuit. 

Ya I know, have to figure out the best route to go, put microwave on its own circuit or run plugin’s for the system…

In the meantime am i croaking my gear