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This circuit breaker disconnect with undervoltage release mechanism for a piece of critical cancer treatment equipment was furnished by the equipment vendor. (See attached .jpg photo file.) The equipment can be damaged by low voltage. There was apparently problems with undervoltage mechanism, so the vendor opened up the molded case circuit breaker and inserted a tie wrap to prevent the breaker from opening. A definite NEC violation. (And this obviously must be something that the vendor's technician has done before, I bet.) One of our physical plant electricians discovered this "fix." He will be replacing the breaker tomorrow!

This "fix" is also a Life Safety Code violation, as it prevents the emergency power off pushbuttons for the equipment from working.


David
Submitted by Joe Tedesco