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Posted to sci.electronics.design,sci.electronics.repair,alt.engineering.electrical,alt.rec.crafts.metalworking,rec.crafts.metalworking
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Liability & responsibility of electrician?
Tim Shoppa wrote:
On Jul 5, 2:40Â*am, John E. wrote:
I have been asked to offer an opinion in a sensitive situation.
A machinist moved his shop across town and required some rewiring
(3-phase outlets, conduit, etc.) in order to locate some machines where
he wanted them.
He hires a guy who's not a pro (and later discovers is not insured) but
has done shop wiring before and had a good attitude and track record. The
guy does good work. No complaints about the quality of his work.
Owner throws the switch, all works fine.
The story continues 4 weeks later when the very expensive CNC fries its
controller PCB to the tune of $4000.
Turns out the voltage in the shop was upward of 245 and the taps in the
CNC's power supply were set for 220.
What is the legal and moral responsibility of each party?
What will not be helpful are replies about the character or intelligence
of either of the players or their actions.
From my past experience in industrial environments, it's 100%
guaranteed that the electrician will wire the 3-phase feeds wrong.
Either the phases will be out of sequence (motor spins backwards), or
it'll be Delta instead of Wye, or wrong voltages, or something. It has
absolutely nothing to do with how much specifying you try, it'll get
hooked up wrong every single time.
Tim.
You need to dump the outfit you are using and use a competent electrician.
--
Paul Hovnanian
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Have gnu, will travel.
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