On 5/29/2018 8:28 AM, Jim Wilkins wrote:
I was only a few feet away from another tech when he tried to measure
an SCR trigger circuit floating on 120V with a grounded scope. When he
flipped the power switch the entire probe exploded from the enormous
current in the braid, sending him to the hospital. I was facing away
and didn't see but I think his body shielded me from the fireball.

Defective breaker?