Noticed something today here at the plant. A run of 3" ridgid coming from a mcc to a 130hp motor goes through a hole in an I beam then ninetys up to the motor itself. There is a nice weld bead that circumfrences the conduit. Looks like a violation of 300.18 (B). In this paragraph though, it goes on to state the following:
"unless otherwise specifically designed to be or otherwise specifically permitted to be in this code"
Would the "specifically designed" statement be refering to an engineering design call that might have been made to allow this type of install to happen?
[This message has been edited by Luketrician (edited 11-08-2006).]
I think you're right LarryC, It seems to me that the NEC is 'trumped' by the design engineers here at the plant. Is this a good thing?? That question is debateable...
The conduit does have plenty of enamel covering the weld joint though. No rust is visible. I would snap a few pictures for the forum, BUT..I might get into some trouble if I start taking pictures of 'vital' plant equipment.
Wondering about the statement "specificaly designed by it's manufacturer for weld mounting", the hole looks to have been made with a cutting torch, not to pretty. I'll be looking into this further, any more comments would be appreciated, thanks guys & gals.