the plumbers put black on ground
Sound like the automechanic syndrome again.
Is there any 12 step programs available for this certain disorder???
Would apply to either the installer, or the person injured from the installation
***And now for something completely different***
I was at one of our Bank Branch Remodel projects this morning for Supervision of subs, plus reference sub EC's and existing for As-Builts [got to leave by 10:00 AM!! 5:00 AM to 10:00 AM = kick back day
]
Anyhow, when I was verifying the existing service[s], got to check out one of the very few, and probably last, 480 volt ungrounded Delta's that I have/will see[n]!!!
This is an old Building - most likely Circa 1945. It has two separate 400 amp 120/240 1 phase 3 wire gear sections, fed from probably two separate 1 phase transformers [not able to verify this, but that was common for the time period on these types of Commercial structures]. The "Power" stuff [ACs, Pumps, etc.] is fed from the above mentioned 480 volt 3 phase 3 wire Delta - which is also a 400 amp section.
Did some voltage tests on it [just for personal interests] and found out it was ungrounded by the way my Wiggy reacted on a L-G test. The Capacitive Coupled circuit was very apparent from the way the Wiggy "Tried" to register a reading.
So I went to the truck and brought in the Digital meter - semi-low loading effect, not a really high input Z meter].
L-L readings swayed from 475 VAC low to 493 VAC high.
L-G readings were 278 VAC low to 345 VAC high.
Wanted to share this extremely important information with all of 'ya!!!
Scott SET