Ovens in courts and reputed places should be safe I guess.
Please see below. I come from the perspective that the buyer is not necessarily the user thus as a buyer,
I will feel safer and have less concerns if the SAFETY MARK is there.
A long time back, I purchased a home appliance that has a SAFETY MARK but it was actually not registered with SPRING.
There are many places, including reputed ones, selling dry cabinets and AFAIK, models which has external AC Adaptor requires
the SAFETY MARK. The ones I saw, I did not managed to find the SAFETY MARK.
A dry cabinet runs 24/7/365. How important is the SAFETY MARK is one's choice - legal or not.
Consumers
To safeguard consumers’ interest, consumers are strongly advised to purchase controlled goods that are
registered with the Safety Authority and are affixed with the SAFETY Mark. Registered controlled goods that
have met the specified safety requirements help to prevent fire, electric shock, explosion, radiation and other
hazards that could result in injuries or deaths to humans and/ or damages to private properties.
Source : http://www.spring.gov.sg/QualityStandards/CPS/Documents/CPS_InfoBooklet.pdf