Here's the layout: A 120/208 volt 3 phase fused disconnect feeding a 200 amp 3 phase main lug panel.
The customer has installed 2 exposed steel I-beams that support a mezzanine floor. The beams rest on steel posts bolted to concrete sds poured to grade. The remainder of the building is wood frame. My first question: is grounding required and if so, how should I bond these suckers?
My second question: A 1 1/2 HP 120/208 volt 3 phase fan motor (rated 6.6 amp per phase running current) was installed on the roof. It is rated continuous duty so I have to install a starter with heaters that limit the current to 125%. If I install 1 3 pole 20 amp breaker can I install a non-fused (as opposed to a fused) disconnect on the roof? How close to the unit does the 2002 code require it to be? Am I allowed to tap one of the phase conductors before the starter to feed a fractional HP single phase fan motor (rated at 4 amps)?
Thanks guys.
bob


[This message has been edited by elecbob (edited 05-23-2003).]