Safety when experimenting with large currents

I am experimenting with large currents from ultra capacitor discharge.

For example with 500 A (at 2.8 V) you get a very impressive demonstration of the magnetic field of a straight conductor using compass needles or iron chips (compare: http://iopscience.iop.org/article/10.1088/0143-0807/31/1/L03/pdf).

Another example is the Thomson ring experiment http://www.rose-hulman.edu/~moloney/Ph425/0143-0807_33_6_1625JumpingRing.pdf where you may get up to 9000 A for a very short time.

Suppose all voltages used are below 60 V. What do you need to consider about safety in this case?

Here is what I think:

• Since the voltage is too low, there should be no danger from current through the human body.


• There might be a danger from sparks and lightening when if there are contact problems.
  
  
  
  • This may be dangerous because of UV light
  
  
  • and because of sparks hitting directly the eye
  
  
  
  
  


• Also the there might be heat problems which makes thinks to vaporize which you may inhale


• A capacitor discharge generates an EMP which may affect pacemakers for example

I am not sure if I mentioned all possible dangers concerning this. My question is:

• Under which conditions (minimal current, discharge time...) which danger will become relevant


• What to do to make it safe