Definition of user accessible per 60950-22 for exposed PCB switch node voltages

According to 60950-22 the limit for user-accessible hazardous voltage is reduced to 15VAC, 21.2V peak, 30VDC. To me that means that 24VDC supply input is safe, but not at the 5.0V DC/DC buck converter switch node, as it is 24V peak at that point. 



I had an idea to make temperature tests and following steel ball impact test not applicable if I can make the PCB without this 24Vpeak hazardous voltage to be user accessible. Either by isolating the tiny exposed areas of the switch node with silicone or find the definition "user accessible" to be in such way that is exposed area is too small (f.x. a childens finger cannot access it).

Magnus while I don't know these rules I'd say if your supply is less than 30VDC you'd be ok, but you need to stick to the letter of the law to avoid any unpleasant legal surprises.  But you have at least partially answered your own question - if you can make the device non user accessible the rules don't apply.  This is why those pesky wall warts are always ultrasonic welded together now, not like the good old days when you could unscrew them and fix them.  I'm sure there are consultants you can hire to check that you're compliant - maybe see if UL have a list of suitable people?