lonewolf454
Member
I have two cooling fan units that someone else wired up that is definitely not code. There is one disconnect in sight of the units disconnecting all three. The MCC is not nearby, which contains the starter (and breaker)
Unit 1, 1.5HP and a 2HP 3PH motor
Unit 2, 2 HP Motor These are all 1800 RPM.
I need to set a box and it be code. So... I plan on
2 size 0 AB 509 starters
1 equivalent overload relay for second motor of unit 1 (the 1.5HP)
1 500VA control xfmr 480/120
2 3 pole fuse blocks
1 2 pole fuse block for xfmr
1 Hoffman style enclosure
But, to be code I think I will still need a disconnecting means (breaker) inside the panel. I think the primary of xfmr will need to be fused.
Questions,
1. Must I have a disconnecting means inside the panel or can I use the existing external 30A disconnect to feed the enclosed panel
2. I have used overloads to protect second motors on same piece of machinery without a seperate starter, coming off bottom of contactor to feed the second overload. Is this code or must I have a complete separate controller (starter)?
3. I considered AB supplementary breakers to protect the two motor starter circuits, but with the xfmr needing fuses and the disconnect inside the panel (?) and since whatever disconnects line from starters must disconnect xfmr I think fuseholders and one breaker(as disconnect) would be better looking and code?
Unit 1, 1.5HP and a 2HP 3PH motor
Unit 2, 2 HP Motor These are all 1800 RPM.
I need to set a box and it be code. So... I plan on
2 size 0 AB 509 starters
1 equivalent overload relay for second motor of unit 1 (the 1.5HP)
1 500VA control xfmr 480/120
2 3 pole fuse blocks
1 2 pole fuse block for xfmr
1 Hoffman style enclosure
But, to be code I think I will still need a disconnecting means (breaker) inside the panel. I think the primary of xfmr will need to be fused.
Questions,
1. Must I have a disconnecting means inside the panel or can I use the existing external 30A disconnect to feed the enclosed panel
2. I have used overloads to protect second motors on same piece of machinery without a seperate starter, coming off bottom of contactor to feed the second overload. Is this code or must I have a complete separate controller (starter)?
3. I considered AB supplementary breakers to protect the two motor starter circuits, but with the xfmr needing fuses and the disconnect inside the panel (?) and since whatever disconnects line from starters must disconnect xfmr I think fuseholders and one breaker(as disconnect) would be better looking and code?