drilling and tapping structural steel

[mfarash1]

we do it all the time with transfomers but, i was told that according to the 2011 nec you can not drill and tap any load bearing steel. my question is what section of the code will tell me that?

 

[infinity]

I could be wrong but I don't think that you'll find that in the NEC. Who saying that it's in there?

Welcome to the Forum.

 

[mfarash1]

one of my teachers

 

[mfarash1]

thanks this is a cool website and forum

 

[ceb58]

one of my teachers

Ask the teacher to teach us all and give the code reference.

 

[John120/240]

For strucural steel use exothermic welding. It is a permanent connection.

 

[ActionDave]

For strucural steel use exothermic welding. It is a permanent connection.

For holding up a transformer???

 

[Sierrasparky]

For holding up a transformer???

It may not be in the NEC but it could be in the UBC

 

[iwire]

For holding up a transformer???

:lol::lol:

 

[jumper]

Wouldn't this an engineering spec?

 

[mfarash1]

I had class this night and as it turns out it wasn't in the NEC, it was a trick question he gave to to us to see how well we would research the answer. He was impressed that i knew about the forum and used it as a tool. Just wanted to say thanks to all the people who responded. This a great website and a great tool for learning

 

[John120/240]

For strucural steel use exothermic welding. It is a permanent connection.

Oops brain fart; In the Grounding & Bonding section of the Forum I took it to apply to

ground lug attachment.

 

[infinity]

I had class this night and as it turns out it wasn't in the NEC, it was a trick question he gave to to us to see how well we would research the answer. He was impressed that i knew about the forum and used it as a tool. Just wanted to say thanks to all the people who responded. This a great website and a great tool for learning

Since there seems to be a propagation of the many myths that we have in this industry it's always best to ask someone for a reference when they provide information. Often when in CEU classes we will hear the instructor say something that doesn't seem correct so someone (usually me) will ask for a code reference. One should always ask for a reference when in doubt. I find the worst offenders to be guys on the job. :lol: