I want to install several Arduino controlled relays which are use to turn on/off some lights, a fog machine and some door locks in a building. What do I need to do to insure that the power relays don't violate building code?
Do components need to be put in a box or can they be mounted to a 2x4? Are there requirements regarding the points were the bear wire is screwed into the relay?
I am assuming that if anyone as ever wired an Arduino into a garage door opener, these questions may have come up.