Splice an equipment grounding conductor?

[Machiavelli999]

I am working on an installation of a tool that an AC Rack. It's basically a power distribution board. The AC Rack required a 300 amp feed, which I provided as 3 #350KCM & #4 GND.

When the tool arrived it had four lugs all sized for #350 KCM. The manufacturer admits their mistake, however we now have to deal with this.

The ground lug is too large to hold down the #4 GND conductor. The lug can hold down #1/0 AWG. Can I provide #1/0 from the ground lug to a nearby location where I would splice the #1/0 AWG conductor with the #4 GND conductor from the panelboard?

Looking through Article 250, 250.124 talks about Equipment Grounding Conductor Continuity, but it seems to only prohibit switching of the grounding conductor. Also, taps are permitted as discussed in 250.122(G). So, I do not see why this would not be allowed. It's obviously a sloppy solution, so if anyone has a more elegant way to solve this please let me know.

Thanks!

 

[augie47]

No problem

 

[eric9822]

Is there a reason you can't install a properly sized lug?

 

[hurk27]

I used many of those butt splice terminals that have the setscrews to install to a larger conductor to fit into a larger terminal, and visa versa when you do a tap from a 200 amp service to a 150 amp main breaker same problem, you can get what is called "pin reducers" but for the cost of them I would do just what your doing.

Take a look at this photo at the bottom right and you will see exactly what your wanting to do: