460V 10HP 3phase motor
CEC Table 44 FLC-14Amps I went with this because I can't see the nameplate.
Supply conductor ampacity must be not less than 125% FLC of motor.
14 A x1.25= 17.5 A
I am not sure about your description of the tray “Random” so I will provide two answers.
#1-In ventilated and ladder-type cable trays, where the air space between conductors, cables, or both is maintained at not less than 25% nor more than 100% of the largest conductor or cable diameter
I will assume more than 6 cables horizontal and 2 layers.
CEC 12-2210(2) Common multiplier from Table 5D is 0.74
17.5A / 0.74 = 23.6 A
So you need a conductor that holds at least 23.6 A so #10 awg
*This does not take into account ambient temperature or voltage drop.
#2-In ventilated and ladder-type cable trays, where the air space between the conductors, cables, or both is less than 25% of the largest conductor or cable diameter
CEC 12-2210(3) Common multiplier from Table 5C is 0.50
17.5A / 0.5 = 35A
So you need a conductor that holds at least 35 A so #8 awg
*This does not take into account ambient temperature or voltage drop.
I am not sure what you mean about the conductor ampacity must be based on 75deg? These conductors in the cable tray are going to a controller for this motor I am assuming. Please explain.(give code rule) Maybe I am missing something.
Thanks
[This message has been edited by RobbieD (edited 01-05-2005).]
[This message has been edited by RobbieD (edited 01-05-2005).]
