Hero999
Banned
It depends on where you live; where I live the IEE regulations govern what is acceptable and what isn't and it's a little bit more complected than that.
Anything below 60VDC or 25VAC in dry conditions doesn't need to be insulated from the user at all.
Voltages between 60VDC or 25VAC and 120VDC or 50VAC, only need a single layer of insulation from the metal chassis or the user and there is no need for the chasses to have an earth connection (class 3).
Voltages above 120VDC or 50VAC, either need double insulation from the metal chassis or the user (class 2) or single insulation from the chassis and an earth connection to the chassis (class 1).
Solar pannels would be class 3 if they ran at 94VDC, they'd need to be insulated from the user but you wouldn't need to worry about earthing or double insulation.
Anything below 60VDC or 25VAC in dry conditions doesn't need to be insulated from the user at all.
Voltages between 60VDC or 25VAC and 120VDC or 50VAC, only need a single layer of insulation from the metal chassis or the user and there is no need for the chasses to have an earth connection (class 3).
Voltages above 120VDC or 50VAC, either need double insulation from the metal chassis or the user (class 2) or single insulation from the chassis and an earth connection to the chassis (class 1).
Solar pannels would be class 3 if they ran at 94VDC, they'd need to be insulated from the user but you wouldn't need to worry about earthing or double insulation.