Ground bus bar - Irreversible Lug?

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W@ttson

Senior Member
Location
USA
I have a situation where I have several ground electrodes of various types. Each, through and individual bonding jumper as sized per 250.66 (not table 250.66) connects to a bus bar that is mounted to the wall in my main electrical room.

My GEC which originates from the EGC terminal bar in my main disconnect, makes its way to the bus bar on the wall. (I have a wire type Main bonding jumper from the neutral terminal to the EGC in my main disconnect).

My question is, does the connection to the bus bar on the wall from my GEC need to be made by a irreversible lug or exothermic weld?

Looking at 250.64(F)(3) it just says "Connections shall be made by listed connectors or by the exothermic welding process".

When I think GEC first thing that comes to mine is continuous and exothermic welds/irreversible crimps, is that the case here?
 

augie47

Moderator
Staff member
Location
Tennessee
Occupation
State Electrical Inspector (Retired)
Most of the commonly used connectors (split bolts, crimp lugs) are "listed for grounding". You need to check your factory data sheets to assure.
 

infinity

Moderator
Staff member
Location
New Jersey
Occupation
Journeyman Electrician
When I think GEC first thing that comes to mine is continuous and exothermic welds/irreversible crimps, is that the case here?
No. As Augie stated most mechanical terminals are listed for grounding but just check to be sure.
 
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