Are there any regulations that would prevent a contractor doing work within a 69 kv substation from installing a mobile office trailer within the fenced area as long as all clearances are maintained?
I understand the equipment grounding conductor is sized based on NEC 250.122(A): "General. Copper, aluminum, or copper-clad aluminum equipment grounding conductors of the wire type shall not be smaller than shown in Table 250.122,…”. Table 250.122 lists the minimum size equipment grounding...
I am looking for the efficiency of a 600 HP Magnitic Drive manufactured by Electric Machinery (EM), model Ampli-Speed. Does anyone know where I can find this information or has experience comparing this technology with other variable frequency drive types in terms of efficiency?
