upgrade exsisting sub panel in garage questions ???
#1
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upgrade exsisting sub panel in garage questions ???
I have a existing subpanel in garage with 10/2 ufb with ground from a 30 amp breaker in house to two 15 amp in garage and need 60 amp. could i run another 10/2 out to garage hook the the 2 feeders to one 60 amp in the house and be able to supply 60 amp sub panel in garage. i guess the big question is two 10 gauge wires equal to one 5 gauge.
any ideas
Trying to do this on the cheep but safe at the most i would have powered at one time out there would be a 2.5 hp air compressor, stereo and 6 or so shop lights.. is this possible?
any ideas
Trying to do this on the cheep but safe at the most i would have powered at one time out there would be a 2.5 hp air compressor, stereo and 6 or so shop lights.. is this possible?
Last edited by Jeff Dang; 12-17-16 at 04:49 AM. Reason: forgot spell check
#2
Welcome to the forums! Is the garage detached or attached? You can't double up any of the wiring in order to achieve proper size. It would be best to abandon the 10-2 and run a new 6 AWG in 4 wire (for less than 75') to the panel with breakers on both ends. Does your subpanel have accommodations for a main breaker? Is there conduit between the panels?
#4
I should have incorporated a sub question. What is the diameter of the conduit?
Good load center. Check with local authorities to make sure you can use a main lug center. Murray 60 Amp 2-Space 4-Circuit Surface Mount Main Lug Load Center-LC002GSU - The Home Depot
You will need to run 4 wires, and I suggest using #6 THHN. 100 ft of each (RGBW) will run about $65. UF cable is a bear to run in conduit.
You will also need a separate grounding bar to be attached to the panel, and 2 grounding rods and #6 bare copper to run from the panel continuously to the grounding rods.
Use your 10-2, but not here, as it doesn't have the ampacity you need with the 60 amp circuit.
Good load center. Check with local authorities to make sure you can use a main lug center. Murray 60 Amp 2-Space 4-Circuit Surface Mount Main Lug Load Center-LC002GSU - The Home Depot
You will need to run 4 wires, and I suggest using #6 THHN. 100 ft of each (RGBW) will run about $65. UF cable is a bear to run in conduit.
You will also need a separate grounding bar to be attached to the panel, and 2 grounding rods and #6 bare copper to run from the panel continuously to the grounding rods.
Use your 10-2, but not here, as it doesn't have the ampacity you need with the 60 amp circuit.
#5
I would go with a main breaker panel kit such as:
Eaton 100 Amp 10-Space 20-Circuit Type BR Main Breaker Renovation Panel Load Center Value Pack (Includes 2-BR115 and 1-BR230)-BR1020B100SRNV - The Home Depot
or
Eaton Cutler-Hammer 100 Amp 20-Space 20-Circuit Indoor Main Circuit Breaker Panel Value Pack-BR2020B100V4 - The Home Depot
They cost a little more but not that much more since they include some branch circuit breakers and they are good future proofing should you ever need more breakers.
Eaton 100 Amp 10-Space 20-Circuit Type BR Main Breaker Renovation Panel Load Center Value Pack (Includes 2-BR115 and 1-BR230)-BR1020B100SRNV - The Home Depot
or
Eaton Cutler-Hammer 100 Amp 20-Space 20-Circuit Indoor Main Circuit Breaker Panel Value Pack-BR2020B100V4 - The Home Depot
They cost a little more but not that much more since they include some branch circuit breakers and they are good future proofing should you ever need more breakers.
#6
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First things first. As asked what is the size of the existing conduit between the house and garage? You may not even be able to install larger wire. Code limits wire size to a percentage of conduit fill.
#8
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If you do have large enough conduit to handle larger wire use the existing #10 to pull in the new wire as you pull out the #10. Or pull in a pull rope when pulling out the #10. Just one of those things that will make you cuss if you forget to use the old wire to pull in a rope or the new wire.
#10
I have a existing subpanel in garage with 10/2 ufb with ground from a 30 amp breaker in house to two 15 amp in garage and need 60 amp.
#11
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The 10-2 UF-B cable was never code compliant to feed a subpanel where you are using single pole breakers for 120 volt lights and receptacles.