Here it's just the plug that has to be to code.
When you sell your house, and have the buyer's home inspection, unplug the power strip and put it in the drawer until after the inspection, if you are concerned.
Home inspector will inspect all plugs, and if they aren't up to your local codes, you will have to upgrade them if buyer's loan is FHA or VA. If it's a FHA or VA loan, anything that is code will have to be fixed PRIOR to closing. Home inspector will come back and reinspect prior to closing.
I don't know what your FHA or VA loan limits are in your area, they are different all over the country based on median incomes. Most likely your house would qualify.
If you don't want to fix anything.... have your agent change your listing to "selling as is".
FHA and VA "fixes" can be costly and stuff you wouldn't think was an issue. I had one listing that had a 10' wide planting bed between the front walk and a brick retaining wall with a 5' drop to driveway. Because it was over 30 inches, seller had to put up a fence from edge of house to where drop was less than 30". Seller was not happy with me.... house was 40 yrs old!! It had to be done and inspected prior to closing. Should have seen me scrambling to find someone that could put up a fence, at reasonable cost within a week.