NEC 517.13 Purpose Known?

[Macg01]

Does anyone know why 517.13 "double" or "redundant" grounding was created and became "CODE?" It must be due to a potential for shock, but I'm puzzled because an outlet is grounded or it's not grounded. If it is verified grounded, what is the worry? Are we talking about the remotest of remote possibilities, sort of 1:Billions? Are we meaning the chance of anything bad happening 1 in many billions or has anyone done an estimate or calculation or probability? Actually, start by the question, "Has anyone died or been injured due to being shocked by an outlet confirmed grounded? I just don't get it, but would be delighted to learn why this is so important and enforced ubiquitously across the country. And I hope no one replies, "because it's Code..."

 

[roger]

Read the I.N. after 517.11

Roger

 

[hbiss]

You are a property owner/landlord. You are here complaining about redundant grounding in a health care setting, of which you obviously know nothing about.

So what's the backstory here? Betcha any amount of money that some doc wants our OP to foot the bill to rewire a space the OP is renting to the doc because it doesn't comply with 517.13(A).

-Hal

 

[hhsting]

You are a property owner/landlord. You are here complaining about redundant grounding in a health care setting, of which you obviously know nothing about.

So what's the backstory here? Betcha any amount of money that some doc wants our OP to foot the bill to rewire a space the OP is renting to the doc because it doesn't comply with 517.13(A).

-Hal

 

[tom baker]

"Code is code. Its ok for someone else but we don't like the rules we don't agree with it they cost us time and money"
Mike Holt once said this.
I would suggest you direct your question on redundant grounding to the publisher of the NEC, NFPA. We don't have the resources or time to research your question.