dpc - Thanks for your comments.
We can apply the NESC 2012 option in SKM and EasyPower; however, there are differences between NESC 2012 and OSHA's 1910.269 Minimum Approach Distances (MAD) and arc flash calculation methods. Since OSHA will only accept ARCPRO results for arc flash hazard...
My company is beginning to receive requests from utility companies and co-generators to conduct studies that comply with OSHA's CFR 1910.269 January 1, 2015 deadline for completion of arc flash hazard estimates. Having trouble getting my head around the process and implementation.
For past...
On a grounded wye primary, delta connected secondary step down transformer, could a secondary X1-X2 fault be cleared by the transformer primary H3 bayonet fuse or would the H1 fuse respond first?
Cut me some slack because I'm an EE, but in Hawaii, when specifying outdoor equipment enclosures for DoD land-based projects, we call for 304L or, preferably, 316 stainless steel. High humidity and chlorides quickly corrode other steels, supposedly 304 stainless too.
Three issues:
[1]...
