I haven't yet charged my Bolt, but my i-MiEVs both came with 8 amp cords. Painfully slow, even with the small battery. I had one cord upgraded to do 12 amps and either 120 or 240 volt charging. What a difference! 12 amps, even at 120 volts, charges considerably faster, almost 2x faster on the i-MiEV.
You want to be on a dedicated circuit, or at least make sure that no other major loads are on the same circuit as the car (no plug-in power tools, coffee makers, toasters, etc.) when charging the car. 12 amps will warm the plug a bit, but if anything gets hot, dial it back down to 8 amps.
Ultimately, if you plan on driving more than 60 miles a day, you'll want to invest in 240 volt charging. This can be as inexpensive as utilizing an existing welder or dryer outlet and having your cord upgraded (
http://evseupgrade.com/?main_page=produ ... ucts_id=31) or as expensive as getting a fancy pedestal charging station installed.
(I have no affiliation to EVSEUpgrade outside of being a customer. My i-MiEV cord has their upgrade and it works well, so I recommend it.)