Electrical Welding Conection Code

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Dear All,I have a project about welding connected between Cu (ETP) to Cu (ETP) for eclectric connection.But i don't find any electric standard show this connection.This is welded joint with GTAW process.Any one know it, tell me about standard (or code) pls.
Reply:NEC or NESC?  UL?  I'm guessing you won't get a viable answer
Reply:Are you trying to weld two bus bars together?
Reply:Originally Posted by ironmangqAre you trying to weld two bus bars together?
Reply:It's one of those weldments where strength is not so important as the resistivity of the connection, or so I have been led to believe."USMCPOP" First-born son: KIA  Iraq 1/26/05Syncrowave 250 w/ Coolmate 3Dialarc 250, Idealarc 250SP-175 +Firepower TIG 160S (gave the TA 161 STL to the son)Lincwelder AC180C (1952)Victor & Smith O/A torchesMiller spot welder
Reply:I would suppose this is one of those where the actual application should make a really really big difference. AC or DC application, high freq or low freq, high/low amps with high/low voltage. Measuring a welded bus bar with an ohm meter isn't going to cut it for use in a power substation would be one example. My guess is that valid certification should include a host of tests pertinent to the application.  If it's for a daisey chain of 12v batteries won't matter much."The things that will destroy America are prosperity at any price, peace at any price, safety first instead of duty first, the love of soft living and the get rich quick theory of life." -Theodore Roosevelt
Reply:Originally Posted by OldendumIt's one of those weldments where strength is not so important as the resistivity of the connection, or so I have been led to believe.
Reply:I bet the standard is a mechanical fastening, or soldering. If there is a welding document, I bet it specifies the cross section of the welded area needs to be at least the same cross section as the conductor.  It might also specify the obvious of using copper filler for copper to copper. Other than that, if there is no mechanical force on it, the current carrying ability is the only thing that matters, and keeping a pure copper cross section from one end to the other would meet the electrical needs.miller syncrowave 250hobart handler 140home made 400 amp engine driven in progress...
Reply:If strength is NOT any issue, silver solder would offer (probably) the least resistance of any 'connection', less electrical resistance than gold, I've been led to believe that silver offers the least resistance of all metals.-c-
Reply:Been working in substations for 29 years.We have 831 substations. I can't think of any welded connection on the copper bus.All are bolted to my knowldge.Be thankful we're not getting all the government we're paying for