FEEDER CONDUCTOR SIZING [215.2]

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CARZEP

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CYPRESS, TEXAS, HARRIS
I WAS LOOKING AT ONE OF MIKE HOLTS VIDEOS PUBLISHED JANUARY 11, 2017.
I WAS WONDERING IF THE UTILITY WEATHER HEAD BUTT CONNECTORS CAN BE USED FOR 90 DEGREE RATED WIRE SINCE IT IS NOT CONNECTED IN AN ENCLOSURE.

IF SO CAN THE 90 DEGREE WIRE BE USED TO RUN FROM THE WEATHER HEAD TO 100 FEET TO A COMMERCIAL BUILDING TO A JUNCTION BOX WITH 90 DEGREE RATED POWER DISTRIBUTION BLOCK JUST BEFORE IT ENTERS INTO THE C.T. CAN.

BY READING THE CODE IT IMPLIES ONLY JUNCTION BOX TO JUNCTION BOX WITH 90 DEGREE RATED WIRE.

JUST YOUR THOUGHTS ON THAT.

THANKS AND ALL THE BEST.

CARL Z.
 
Welcome to the forum Carl.

You can use 90C conductors in most any location the question really is can you use them at the 90C rating or do you need to back them up to the 75C rating of the equipment.

Can you describe what you want to do a bit more?
 
FEEDER CONDUCTOR SIZING [215.2]

MORE CLEARLY I WANT TO RUN 90 DEGREE WIRE FROM UTILITY BUTT SPLICE AND WEATHER HEAD TO A JUNCTION BOX ON THE SIDE OF THE BUILDING WITH 90 DEGREE TERMINAL BLOCK AND THEN FROM THERE USE THE 70 DEGREE WIRE TO GO TROUGH THE C.T. CAN AND TO THE MAIN DISTRIBUTION PANEL RATED AT 70 DEGREE TERMINAL LUGS.

CAN THIS BE DONE IS MY QUESTION.
 
CARZEP said:
MORE CLEARLY I WANT TO RUN 90 DEGREE WIRE FROM UTILITY BUTT SPLICE AND WEATHER HEAD TO A JUNCTION BOX ON THE SIDE OF THE BUILDING WITH 90 DEGREE TERMINAL BLOCK AND THEN FROM THERE USE THE 70 DEGREE WIRE TO GO TROUGH THE C.T. CAN AND TO THE MAIN DISTRIBUTION PANEL RATED AT 70 DEGREE TERMINAL LUGS.

CAN THIS BE DONE IS MY QUESTION.
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Probably. Please turn off the CAPS lock.
 
CARZEP said:
More clearly i want to run 90 degree wire from utility butt splice and weather head to a junction box on the side of the building with 90 degree terminal block and then from there use the 70 degree wire to go trough the c.t. can and to the main distribution panel rated at 70 degree terminal lugs.

Can this be done is my question.
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Yes. As long as nothing within the equipment or enclosure where the 90°C-rated conductor terminates is rated less than 90°C, you can use the 90°C ampacity rating.
 
Sounds a bit more like a Service than a Feeder. If this is in reference to an actual install, I'd check with the power company first. Some of them don't like terminal blocks prior to metering.
 
FEEDER CONDUCTOR SIZING[215.2]

FEEDER CONDUCTOR SIZING[215.2]

Sorry my bad, yes this is service not a feeder. I will take your advise and consult with the utility company to see if they alllow taps and if they do it will save me on the wire cost.

Again thanks and all the best

CARL
 
CARZEP said:
Sorry my bad, yes this is service not a feeder. I will take your advise and consult with the utility company to see if they alllow taps and if they do it will save me on the wire cost.

Again thanks and all the best

CARL
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The conductor we have been discussing is not a tap. From a weatherhead to and through the C.T cabinet to a single service disconnecting means is simply the service entrance conductor. The transition from the 90°C wiring method to 75°C wiring method is simply a splice. The POCO objection is likely but should be limited to the terminal box required to make the transition happen. Perhaps they'd approve if the box is lockable, sealable.

Anyone know of CT's rated for 90°C operation? If the CT cabinet could be upgraded to 90°C operation there'd be no need for the transition box. The POCO would have no reason to disapprove. But that's the tough, if not impossible part of the equation. :weeping:
 
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