Roof Top Units

[Ampacity]

A roof top unit(combination AC and gas heat) has a full load of 29 amps. Would a 30 amp fusible disconnect with time delay 30 amp fuses and # 10 wire be acceptable or would the 115% of 28-714 apply?

[bigrockk]

Hello Ampacity,

Yes 28-714 does apply !

Also #10 wire is not large enough as 28-106 & 28-706 requires the conductors to have an ampacity not less than 125% of the motor FLA.

Also check out 28-708 for overcurrent device sizing.

Hope this helps..

<font color="#a62a2a" size="1">[ May 15, 2003 06:52 PM: Message edited by: bigrockk ]</font>