Ontario I believe is one of the few provinces that require a sticker before it is used in a commercial setting.
A call to the local Electrical building inspector should be able to tell you who you contact.
As for conforming, I use the NFPA pub. Electrical Standards for Industrial Machinery as a guide line.
They may look for grounding, power disconnect & fusing and enclosure interlock, i.e. prevention of opening an enclosure with the power still on.
There are some relaxing of the rules I believe that may not entail a sticker if it is fed with no more than 120v 1 phase.
Also there may be other non-electrical safety issues that it may have to conform to especially in a school setting.
Al.
CNC, Mechatronics Integration and Custom Machine Design
“Logic will get you from A to B. Imagination will take you everywhere.”
Albert E.