3 phase wiring question

[ActionDave]

Off subject:
Has anyone had a laugh at what the spell checker want's to change some of our user names too? Don's is Escaped
Mine is Huck:roll:

That's what mine changed you to.

 

[Smart $]

A fault could also be an "arching fault" that doesn't burn clear or trip the OCP. In a bottling plant you could expect wet (conductive) conditions that could put a person in the path between the two faults. Say one hand on a conduit and the other hand on the faulting equipment. Difference in potential.

The book also cites an intermittent arcing ground fault as being able to produce voltages 5 or 6 times normal, with enough current to cause motor failures.

While this high[er] voltage is possible, first we must consider how that it is measured. Is it referenced to the grounded side of the fault?

Next we must entertain the notion that immediate personnel safety is relative to the amount of potential between conductive materials which they can come in contact with. Assuming the fault is contained within grounded equipment, they cannot come in contact with the ungrounded side of the fault. When non-current-carrying conductive materials have been properly bonded and grounded, the risk to personnel is minimized (not to be construed as meaning without risk).

 

[acrwc10]

While this high[er] voltage is possible, first we must consider how that it is measured. Is it referenced to the grounded side of the fault?

Next we must entertain the notion that immediate personnel safety is relative to the amount of potential between conductive materials which they can come in contact with. Assuming the fault is contained within grounded equipment, they cannot come in contact with the ungrounded side of the fault. When non-current-carrying conductive materials have been properly bonded and grounded, the risk to personnel is minimized (not to be construed as meaning without risk).

Are you running for political office or something? :grin:
The point is to mitigate a hazard, this system, that this post is about, may or may not be safe. The OP has not clarified if this is an intentionally non-grounded system, accidentally non-grounded system, if it has ground detection or not. My fear is that the OP is not qualified (in this one area) to adequately trouble shoot this system, so I caution him to get someone in there that does understand un-grounded systems. There maybe no hazard here, or there maybe a real danger. I am not going to argue the "existing condition" point of view. There are too many un-knowns.

 

[dbuckley]

Has anyone had a laugh at what the spell checker want's to change some of our user names too?

WordStar reckoned my name was Devoid Booklet.

 

[hurk27]

WordStar reckoned my name was Devoid Booklet.

LMAO:grin:

The SC in here just takes the d off, and capitalizes the B "Buckley"