GRAND FATHERED OVERHEAD CRANE GROUNDING

[willhendrix]

I have a customer with a facility built in 2001. The building has several overhead cranes. The company safety officer wants all their overhead cranes grounded with a forth rail. The cranes are 10 and 20 ton rated that are powered by 480 volt 3 phase. None of the cranes have a forth rail for grounding.
My question is: is this now required by OSHA or some other AHJ or not? If so, can anyone point to a specific reference or reference? I assume OSHA would refer to the General Duty Clause, which is fair, but the facility was built prior to 2005 NEC.

 

[eric9822]

I am in the process of installing a grounding rail on a crane that was installed well before 2005, it was dinged during a recent inspection for not having one. I initially argued that it was grandfathered but while researching the issue I ran across these:

http://www.industrialliftandhoist.com/blog/are-you-grounded
http://www.cranebuzz.com/planning/OSHA_Response_Letter.pdf

 

[jimC.]

We have close to 30 cranes at this facility, all three rail and just went through an extensive OSHA audit at the end of the year. Nothing was mentioned about needing a fourth rail on existing. I will keep an eye on this thread; that would be a lot of work.