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adamie
Dec 23, 2011, 08:50 PM
Have a 26 amp motor, 6.6 hp, voltage at 208. What size fusible disconnect do I need?
For an Elevator circuit.

tkrussell
Dec 24, 2011, 04:09 AM
Something is odd, 6.6 HP is not a standard NEMA motor size.

And according to NEC Table 430.250, a 7.5 HP is rated 24.2 amps at 208 volts.

Disconnecting means needs to be rated no less than 115 % of full running load of the motor.

adamie
Dec 27, 2011, 09:05 PM
Thanks tKrussell,

I Thought the same thing a 6.6 hp wasn't in my 2008 code book so how I'm going to calculate this.
Also in the NEC 430.22(E) says that elevators have to have a duty cycle service on the nameplate,
(5)min, (15)min,(30&60)min, or continuous rated motor.So depending on the amperage and multiplying
The percentages will give me the correct amps.

Thanks once again